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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds2010-02-254-2/+60
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (44 commits) Add MAINTAINERS entry for virtio_console virtio: console: Fill ports' entire in_vq with buffers virtio: console: Error out if we can't allocate buffers for control queue virtio: console: Add ability to remove module virtio: console: Ensure no memleaks in case of unused buffers virtio: console: show error message if hvc_alloc fails for console ports virtio: console: Add debugfs files for each port to expose debug info virtio: console: Add ability to hot-unplug ports virtio: console: Handle port hot-plug virtio: console: Remove cached data on port close virtio: console: Register with sysfs and create a 'name' attribute for ports virtio: console: Ensure only one process can have a port open at a time virtio: console: Add file operations to ports for open/read/write/poll virtio: console: Associate each port with a char device virtio: console: Prepare for writing to userspace buffers virtio: console: Add a new MULTIPORT feature, support for generic ports virtio: console: Introduce a send_buf function for a common path for sending data to host virtio: console: Introduce function to hand off data from host to readers virtio: console: Separate out find_vqs operation into a different function virtio: console: Separate out console init into a new function ...
| * virtio: console: Add ability to hot-unplug portsAmit Shah2010-02-241-0/+1
| | | | | | | | | | | | | | Remove port data; deregister from the hvc core if it's a console port. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: console: Register with sysfs and create a 'name' attribute for portsAmit Shah2010-02-241-0/+1
| | | | | | | | | | | | | | | | | | | | The host can set a name for ports so that they're easily discoverable instead of going by the /dev/vportNpn naming. This attribute will be placed in /sys/class/virtio-ports/vportNpn/name. udev scripts can then create symlinks to the port using the name. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: console: Add file operations to ports for open/read/write/pollAmit Shah2010-02-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Allow guest userspace applications to open, read from, write to, poll the ports via the char dev interface. When a port gets opened, a notification is sent to the host via a control message indicating a connection has been established. Similarly, on closing of the port, a notification is sent indicating disconnection. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: console: Add a new MULTIPORT feature, support for generic portsAmit Shah2010-02-241-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds a new feature, MULTIPORT. If the host supports this feature as well, the config space has the number of ports defined for that device. New ports are spawned according to this information. The config space also has the maximum number of ports that can be spawned for a particular device. This is useful in initializing the appropriate number of virtqueues in advance, as ports might be hot-plugged in later. Using this feature, generic ports can be created which are not tied to hvc consoles. We also open up a private channel between the host and the guest via which some "control" messages are exchanged for the ports, like whether the port being spawned is a console port, resizing the console window, etc. Next commits will add support for hotplugging and presenting char devices in /dev/ for bi-directional guest-host communication. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: console: comment cleanupRusty Russell2010-02-241-2/+4
| | | | | | | | | | | | | | | | | | | | | | Remove old lguest-style comments. [Amit: - wingify comments acc. to kernel style - indent comments ] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Add ability to detach unused buffers from vringsShirley Ma2010-02-241-0/+4
| | | | | | | | | | | | | | | | | | | | | | There's currently no way for a virtio driver to ask for unused buffers, so it has to keep a list itself to reclaim them at shutdown. This is redundant, since virtio_ring stores that information. So add a new hook to do this. Signed-off-by: Shirley Ma <xma@us.ibm.com> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio_blk: add block topology supportChristoph Hellwig2010-02-241-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | Allow reading various alignment values from the config page. This allows the guest to much better align I/O requests depending on the storage topology. Note that the formats for the config values appear a bit messed up, but we follow the formats used by ATA and SCSI so they are expected in the storage world. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * virtio: Add memory statistics reporting to the balloon driver (V4)Adam Litke2010-02-241-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes since V3: - Do not do endian conversions as they will be done in the host - Report stats that reference a quantity of memory in bytes - Minor coding style updates Changes since V2: - Increase stat field size to 64 bits - Report all sizes in kb (not pages) - Drop anon_pages stat and fix endianness conversion Changes since V1: - Use a virtqueue instead of the device config space When using ballooning to manage overcommitted memory on a host, a system for guests to communicate their memory usage to the host can provide information that will minimize the impact of ballooning on the guests. The current method employs a daemon running in each guest that communicates memory statistics to a host daemon at a specified time interval. The host daemon aggregates this information and inflates and/or deflates balloons according to the level of host memory pressure. This approach is effective but overly complex since a daemon must be installed inside each guest and coordinated to communicate with the host. A simpler approach is to collect memory statistics in the virtio balloon driver and communicate them directly to the hypervisor. This patch enables the guest-side support by adding stats collection and reporting to the virtio balloon driver. Signed-off-by: Adam Litke <agl@us.ibm.com> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (minor fixes)
* | Revert "block: improve queue_should_plug() by looking at IO depths"Jens Axboe2010-02-231-3/+1
|/ | | | | | | | | | | | | | | | | This reverts commit fb1e75389bd06fd5987e9cda1b4e0305c782f854. "Benjamin S." <sbenni@gmx.de> reports that the patch in question causes a big drop in sequential throughput for him, dropping from 200MB/sec down to only 70MB/sec. Needs to be investigated more fully, for now lets just revert the offending commit. Conflicts: include/linux/blkdev.h Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-02-201-1/+1
|\ | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: CacheFiles: Fix a race in cachefiles_delete_object() vs rename vfs: don't call ima_file_check() unconditionally in nfsd_open() fs: inode - remove 8 bytes of padding on 64bits allowing 1 more objects/slab under slub Switch proc/self to nd_set_link() fix LOOKUP_FOLLOW on automount "symlinks"
| * fs: inode - remove 8 bytes of padding on 64bits allowing 1 more objects/slab ↵Richard Kennedy2010-02-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | under slub This removes 8 bytes of padding from struct inode on 64bit builds, and so allows 1 more object/slab in the inode_cache when using slub. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> ---- patch against 2.6.33-rc8 compiled & tested on x86_64 AMDX2 I've been running this patch for over a week with no obvious problems regards Richard Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | ARM: 5951/1: ARM: fix documentation of the PrimeCell busLinus Walleij2010-02-201-1/+5
|/ | | | | | | | This fixes the filepath encoded in <linux/amba/bus.h> and adds some documentation as to what this bus really means. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-02-181-0/+1
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: add KEY_RFKILL Input: i8042 - fix KBC jam during hibernate
| * Input: add KEY_RFKILLMatthew Garrett2010-02-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most laptops have keys that are intended to toggle all device state, not just wifi. These are currently generally mapped to KEY_WLAN. As a result, rfkill will only kill or enable wifi in response to the key press. This confuses users and can make it difficult for them to enable bluetooth and wwan devices. This patch adds a new keycode, KEY_RFKILL. It indicates that the system should toggle the state of all rfkillable devices. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | kfifo: Don't use integer as NULL pointerAnton Vorontsov2010-02-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes following sparse warnings: include/linux/kfifo.h:127:25: warning: Using plain integer as NULL pointer kernel/kfifo.c:83:21: warning: Using plain integer as NULL pointer Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Stefani Seibold <stefani@seibold.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2010-02-152-5/+3
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf top: Fix help text alignment perf: Fix hypervisor sample reporting perf: Make bp_len type to u64 generic across the arch
| * | perf: Make bp_len type to u64 generic across the archMahesh Salgaonkar2010-02-042-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change 'bp_len' type to __u64 to make it work across archs as the s390 architecture watch point length can be upto 2^64. reference: http://lkml.org/lkml/2010/1/25/212 This is an ABI change that is not backward compatible with the previous hardware breakpoint info layout integrated in this development cycle, a rebuilt of perf tools is necessary for versions based on 2.6.33-rc1 - 2.6.33-rc6 to work with a kernel based on this patch. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin <schwidefsky@de.ibm.com> LKML-Reference: <20100130045518.GA20776@in.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
* | | Merge remote branch 'nouveau/for-airlied' of nouveau-2.6Dave Airlie2010-02-111-0/+1
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'nouveau/for-airlied' of /home/airlied/kernel/drm-next: nouveau: fix state detection with switchable graphics drm/nouveau: move dereferences after null checks drm/nv50: make the pgraph irq handler loop like the pre-nv50 version drm/nv50: delete ramfc object after disabling fifo, not before drm/nv50: avoid unloading pgraph context when ctxprog is running drm/nv50: align size of buffer object to the right boundaries. drm/nv50: disregard dac outputs in nv50_sor_dpms() drm/nv50: prevent multiple init tables being parsed at the same time drm/nouveau: make dp auxch xfer len check for reads only drm/nv40: make INIT_COMPUTE_MEM a NOP, just like nv50 drm/nouveau: Add proper vgaarb support. drm/nouveau: Fix fbcon on mixed pre-NV50 + NV50 multicard. drivers/gpu/drm/nouveau/nouveau_grctx.c: correct NULL test drm/nouveau: call ttm_bo_wait with the bo lock held to prevent hang drm/nouveau: Fixup semaphores on pre-nv50 cards. drm/nouveau: Add getparam to get available PGRAPH units. drm/nouveau: Add module options to disable acceleration. drm/nouveau: fix non-vram notifier blocks
| * | | drm/nouveau: Add getparam to get available PGRAPH units.Marcin Kościelnicki2010-02-091-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On nv50, this will be needed by applications using CUDA to know how much stack/local memory to allocate. Signed-off-by: Marcin Kościelnicki <koriakin@0x04.net> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| * | | Merge remote branch 'korg/drm-radeon-testing' into drm-testingDave Airlie2010-01-081-0/+1
| |\ \ \
* | | | | drm/vmwgfx: Drop scanout flag compat and add execbuf ioctl parameter ↵Jakob Bornecrantz2010-02-111-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | members. Bumps major. Even if this bumps the version to 1 it does not mean the driver is out of staging. From what we know this is the last backwards incompatible change to the driver. Signed-off-by: Jakob Bornecrantz <jakob@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | | | | drm/vmwgfx: Update the user-space interface.Thomas Hellstrom2010-02-111-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When time-based throttling is implemented, we need to bump minor. When the old way of detecting scanout is removed, we need to bump major. In the meantime, this change should not break existing user-space. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Jakob Bornecrantz <jakob@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2010-02-102-0/+4
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (29 commits) drivers/net: Correct NULL test MAINTAINERS: networking drivers - Add git net-next tree net/sched: Fix module name in Kconfig cxgb3: fix GRO checksum check dst: call cond_resched() in dst_gc_task() netfilter: nf_conntrack: fix hash resizing with namespaces netfilter: xtables: compat out of scope fix netfilter: nf_conntrack: restrict runtime expect hashsize modifications netfilter: nf_conntrack: per netns nf_conntrack_cachep netfilter: nf_conntrack: fix memory corruption with multiple namespaces Bluetooth: Keep a copy of each HID device's report descriptor pktgen: Fix freezing problem igb: make certain to reassign legacy interrupt vectors after reset irda: add missing BKL in irnet_ppp ioctl irda: unbalanced lock_kernel in irnet_ppp ixgbe: Fix return of invalid txq ixgbe: Fix ixgbe_tx_map error path netxen: protect resource cleanup by rtnl lock netxen: fix tx timeout recovery for NX2031 chip Bluetooth: Enter active mode before establishing a SCO link. ...
| * | | | | netfilter: nf_conntrack: fix hash resizing with namespacesPatrick McHardy2010-02-082-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As noticed by Jon Masters <jonathan@jonmasters.org>, the conntrack hash size is global and not per namespace, but modifiable at runtime through /sys/module/nf_conntrack/hashsize. Changing the hash size will only resize the hash in the current namespace however, so other namespaces will use an invalid hash size. This can cause crashes when enlarging the hashsize, or false negative lookups when shrinking it. Move the hash size into the per-namespace data and only use the global hash size to initialize the per-namespace value when instanciating a new namespace. Additionally restrict hash resizing to init_net for now as other namespaces are not handled currently. Cc: stable@kernel.org Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | netfilter: nf_conntrack: per netns nf_conntrack_cachepEric Dumazet2010-02-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | nf_conntrack_cachep is currently shared by all netns instances, but because of SLAB_DESTROY_BY_RCU special semantics, this is wrong. If we use a shared slab cache, one object can instantly flight between one hash table (netns ONE) to another one (netns TWO), and concurrent reader (doing a lookup in netns ONE, 'finding' an object of netns TWO) can be fooled without notice, because no RCU grace period has to be observed between object freeing and its reuse. We dont have this problem with UDP/TCP slab caches because TCP/UDP hashtables are global to the machine (and each object has a pointer to its netns). If we use per netns conntrack hash tables, we also *must* use per netns conntrack slab caches, to guarantee an object can not escape from one namespace to another one. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> [Patrick: added unique slab name allocation] Cc: stable@kernel.org Signed-off-by: Patrick McHardy <kaber@trash.net>
* | | | | | ima: rename ima_path_check to ima_file_checkMimi Zohar2010-02-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ima_path_check actually deals with files! call it ima_file_check instead. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | | | | fix ima breakageMimi Zohar2010-02-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "Untangling ima mess, part 2 with counters" patch messed up the counters. Based on conversations with Al Viro, this patch streamlines ima_path_check() by removing the counter maintaince. The counters are now updated independently, from measuring the file, in __dentry_open() and alloc_file() by calling ima_counts_get(). ima_path_check() is called from nfsd and do_filp_open(). It also did not measure all files that should have been measured. Reason: ima_path_check() got bogus value passed as mask. [AV: mea culpa] [AV: add missing nfsd bits] Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | | | | Merge branch 'upstream-linus' of ↵Linus Torvalds2010-02-051-2/+2
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: [libata] Call flush_dcache_page after PIO data transfers in libata-sff.c ahci: add Acer G725 to broken suspend list libata: fix ata_id_logical_per_physical_sectors libata-scsi passthru: fix bug which truncated LBA48 return values
| * | | | | | libata: fix ata_id_logical_per_physical_sectorsChristoph Hellwig2010-02-041-2/+2
| | |_|_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The value we get from the low byte of the ATA_ID_SECTOR_SIZE word is not not a plain multiple, but the log of it, so fix the helper to give the correct answer. Without this we'll get an incorrect minimal I/O size in the block limits VPD page for 4k sector drives. Also change the return value of ata_id_logical_per_physical_sectors to u16 for the unlikely case of very large logical sectors. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* | | | | | percpu: add __percpu for sparseStephen Rothwell2010-02-051-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is to make the annotation of percpu variables during the next merge window less painfull. Extracted from a patch by Rusty Russell. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | Merge branch 'core-fixes-for-linus' of ↵Linus Torvalds2010-02-041-0/+4
|\ \ \ \ \ \ | |/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: futex: Handle futex value corruption gracefully futex: Handle user space corruption gracefully futex_lock_pi() key refcnt fix softlockup: Add sched_clock_tick() to avoid kernel warning on kgdb resume
| * | | | | softlockup: Add sched_clock_tick() to avoid kernel warning on kgdb resumeJason Wessel2010-02-011-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_HAVE_UNSTABLE_SCHED_CLOCK is set, sched_clock() gets the time from hardware such as the TSC on x86. In this configuration kgdb will report a softlock warning message on resuming or detaching from a debug session. Sequence of events in the problem case: 1) "cpu sched clock" and "hardware time" are at 100 sec prior to a call to kgdb_handle_exception() 2) Debugger waits in kgdb_handle_exception() for 80 sec and on exit the following is called ... touch_softlockup_watchdog() --> __raw_get_cpu_var(touch_timestamp) = 0; 3) "cpu sched clock" = 100s (it was not updated, because the interrupt was disabled in kgdb) but the "hardware time" = 180 sec 4) The first timer interrupt after resuming from kgdb_handle_exception updates the watchdog from the "cpu sched clock" update_process_times() { ... run_local_timers() --> softlockup_tick() --> check (touch_timestamp == 0) (it is "YES" here, we have set "touch_timestamp = 0" at kgdb) --> __touch_softlockup_watchdog() ***(A)--> reset "touch_timestamp" to "get_timestamp()" (Here, the "touch_timestamp" will still be set to 100s.) ... scheduler_tick() ***(B)--> sched_clock_tick() (update "cpu sched clock" to "hardware time" = 180s) ... } 5) The Second timer interrupt handler appears to have a large jump and trips the softlockup warning. update_process_times() { ... run_local_timers() --> softlockup_tick() --> "cpu sched clock" - "touch_timestamp" = 180s-100s > 60s --> printk "soft lockup error messages" ... } note: ***(A) reset "touch_timestamp" to "get_timestamp(this_cpu)" Why is "touch_timestamp" 100 sec, instead of 180 sec? When CONFIG_HAVE_UNSTABLE_SCHED_CLOCK is set, the call trace of get_timestamp() is: get_timestamp(this_cpu) -->cpu_clock(this_cpu) -->sched_clock_cpu(this_cpu) -->__update_sched_clock(sched_clock_data, now) The __update_sched_clock() function uses the GTOD tick value to create a window to normalize the "now" values. So if "now" value is too big for sched_clock_data, it will be ignored. The fix is to invoke sched_clock_tick() to update "cpu sched clock" in order to recover from this state. This is done by introducing the function touch_softlockup_watchdog_sync(). This allows kgdb to request that the sched clock is updated when the watchdog thread runs the first time after a resume from kgdb. [yong.zhang0@gmail.com: Use per cpu instead of an array] Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Dongdong Deng <Dongdong.Deng@windriver.com> Cc: kgdb-bugreport@lists.sourceforge.net Cc: peterz@infradead.org LKML-Reference: <1264631124-4837-2-git-send-email-jason.wessel@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2010-02-021-32/+0
|\ \ \ \ \ \ | | |/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (23 commits) connector: Delete buggy notification code. be2net: use eq-id to calculate cev-isr reg offset Bluetooth: Use the control channel for raw HID reports Bluetooth: Add DFU driver for Atheros Bluetooth chipset AR3011 Bluetooth: Redo checks in IRQ handler for shared IRQ support Bluetooth: Fix memory leak in L2CAP Bluetooth: Remove double free of SKB pointer in L2CAP cdc_ether: Partially revert "usbnet: Set link down initially ..." be2net: Fix memset() arg ordering. bonding: bond_open error return value ixgbe: if ixgbe_copy_dcb_cfg is going to fail learn about it early ixgbe: set the correct DCB bit for pg tx settings igbvf: fix issue w/ mapped_as_page being left set after unmap drivers/net: ks8851_mll ethernet network driver be2net: Bug fix to support newer generation of BE ASIC starfire: clean up properly if firmware loading fails mac80211: fix NULL pointer dereference when ftrace is enabled netfilter: ctnetlink: fix expectation mask dump ipv6: conntrack: Add member of user to nf_ct_frag6_queue structure ath9k: fix eeprom INI values override for 2GHz-only cards ...
| * | | | | connector: Delete buggy notification code.Evgeniy Polyakov2010-02-021-32/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Tue, Feb 02, 2010 at 02:57:14PM -0800, Greg KH (gregkh@suse.de) wrote: > > There are at least two ways to fix it: using a big cannon and a small > > one. The former way is to disable notification registration, since it is > > not used by anyone at all. Second way is to check whether calling > > process is root and its destination group is -1 (kind of priveledged > > one) before command is dispatched to workqueue. > > Well if no one is using it, removing it makes the most sense, right? > > No objection from me, care to make up a patch either way for this? Getting it is not used, let's drop support for notifications about (un)registered events from connector. Another option was to check credentials on receiving, but we can always restore it without bugs if needed, but genetlink has a wider code base and none complained, that userspace can not get notification when some other clients were (un)registered. Kudos for Sebastian Krahmer <krahmer@suse.de>, who found a bug in the code. Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | | Merge branch 'drm-linus' of ↵Linus Torvalds2010-02-011-1/+1
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/radeon/kms: Fix oops after radeon_cs_parser_init() failure. drm/radeon/kms: move radeon KMS on/off switch out of staging. drm/radeon/kms: Bailout of blit if error happen & protect with mutex V3 drm/vmwgfx: Don't send bad flags to the host drm/vmwgfx: Request SVGA version 2 and bail if not found drm/vmwgfx: Correctly detect 3D drm/ttm: remove unnecessary save_flags and ttm_flag_masked in ttm_bo_util.c drm/kms: Remove incorrect comment in struct drm_mode_modeinfo drm/ttm: remove padding from ttm_ref_object on 64bit builds drm/radeon/kms: release agp on error. drm/kms/radeon/agp: Move the check of the aper_size after drm_acp_acquire and drm_agp_info drm/kms/radeon/agp: Fix warning, format ‘%d’ expects type ‘int’, but argument 4 has type ‘size_t’ drm/ttm: Avoid conflicting reserve_memtype during ttm_tt_set_page_caching. drm/kms/radeon: pick digitial encoders smarter. (v3) drm/radeon/kms: use active device to pick connector for encoder drm/radeon/kms: fix incorrect logic in DP vs eDP connector checking.
| * | | | | | drm/kms: Remove incorrect comment in struct drm_mode_modeinfoMarcin Kościelnicki2010-02-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dave Airlie <airlied@redhat.com>
* | | | | | | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2010-02-011-0/+2
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf, hw_breakpoint, kgdb: Do not take mutex for kernel debugger x86, hw_breakpoints, kgdb: Fix kgdb to use hw_breakpoint API hw_breakpoints: Release the bp slot if arch_validate_hwbkpt_settings() fails. perf: Ignore perf.data.old perf report: Fix segmentation fault when running with '-g none'
| * | | | | | | perf, hw_breakpoint, kgdb: Do not take mutex for kernel debuggerJason Wessel2010-01-301-0/+2
| | |_|/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the regression in functionality where the kernel debugger and the perf API do not nicely share hw breakpoint reservations. The kernel debugger cannot use any mutex_lock() calls because it can start the kernel running from an invalid context. A mutex free version of the reservation API needed to get created for the kernel debugger to safely update hw breakpoint reservations. The possibility for a breakpoint reservation to be concurrently processed at the time that kgdb interrupts the system is improbable. Should this corner case occur the end user is warned, and the kernel debugger will prohibit updating the hardware breakpoint reservations. Any time the kernel debugger reserves a hardware breakpoint it will be a system wide reservation. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: kgdb-bugreport@lists.sourceforge.net Cc: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: torvalds@linux-foundation.org LKML-Reference: <1264719883-7285-3-git-send-email-jason.wessel@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | Merge branch 'merge' of ↵Linus Torvalds2010-02-011-0/+4
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: TIF_ABI_PENDING bit removal powerpc/pseries: Fix xics build without CONFIG_SMP powerpc/4xx: Add pcix type 1 transactions powerpc/pci: Add missing call to header fixup powerpc/pci: Add missing hookup to pci_slot powerpc/pci: Add calls to set_pcie_port_type() and set_pcie_hotplug_bridge() powerpc/40x: Update the PowerPC 40x board defconfigs powerpc/44x: Update PowerPC 44x board defconfigs
| * | | | | | | powerpc/pci: Add calls to set_pcie_port_type() and set_pcie_hotplug_bridge()Benjamin Herrenschmidt2010-01-291-0/+4
| |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We are missing these when building the pci_dev from scratch off the Open Firmware device-tree Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2010-01-292-4/+9
|\ \ \ \ \ \ \ | | |_|_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: update multi-touch protocol documentation Input: add the ABS_MT_PRESSURE event Input: winbond-cir - remove dmesg spam Input: lifebook - add another Lifebook DMI signature Input: ad7879 - support auxiliary GPIOs via gpiolib
| * | | | | | Input: add the ABS_MT_PRESSURE eventHenrik Rydberg2010-01-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For pressure-based multi-touch devices, a direct way to send sensor intensity data per finger is needed. This patch adds the ABS_MT_PRESSURE event to the MT protocol. Requested-by: Yoonyoung Shim <jy0922.shim@samsung.com> Requested-by: Mika Kuoppala <mika.kuoppala@nokia.com> Requested-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Henrik Rydberg <rydberg@euromail.se> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| * | | | | | Input: ad7879 - support auxiliary GPIOs via gpiolibMichael Hennerich2010-01-191-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drop the simple fancy sysfs hooks for the aux GPIOs and expose these via the gpiolib interface so that other drivers can use them. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | | | | | | Split 'flush_old_exec' into two functionsLinus Torvalds2010-01-292-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'flush_old_exec()' is the point of no return when doing an execve(), and it is pretty badly misnamed. It doesn't just flush the old executable environment, it also starts up the new one. Which is very inconvenient for things like setting up the new personality, because we want the new personality to affect the starting of the new environment, but at the same time we do _not_ want the new personality to take effect if flushing the old one fails. As a result, the x86-64 '32-bit' personality is actually done using this insane "I'm going to change the ABI, but I haven't done it yet" bit (TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the personality, but just the "pending" bit, so that "flush_thread()" can do the actual personality magic. This patch in no way changes any of that insanity, but it does split the 'flush_old_exec()' function up into a preparatory part that can fail (still called flush_old_exec()), and a new part that will actually set up the new exec environment (setup_new_exec()). All callers are changed to trivially comply with the new world order. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2010-01-281-1/+3
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: ohci: fix crashes with TSB43AB23 on 64bit systems firewire: core: fix use-after-free regression in FCP handler firewire: cdev: add_descriptor documentation fix firewire: core: add_descriptor size check
| * | | | | | | firewire: cdev: add_descriptor documentation fixStefan Richter2010-01-261-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct fw_cdev_add_descriptor.length is in quadlets, not in bytes. Also remove any doubts about the endianess of descriptor data. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* | | | | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds2010-01-271-1/+1
|\ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] aic79xx: check for non-NULL scb in ahd_handle_nonpkt_busfree [SCSI] zfcp: Set hardware timeout as requested by BSG request. [SCSI] zfcp: Introduce bsg_timeout callback. [SCSI] scsi_transport_fc: Allow LLD to reset FC BSG timeout [SCSI] zfcp: add missing compat ptr conversion [SCSI] zfcp: Fix linebreak in hba trace [SCSI] zfcp: Issue zfcp_fc_wka_port_put after FC CT BSG request [SCSI] qla2xxx: Update version number to 8.03.01-k10. [SCSI] fc-transport: Use packed modifier for fc_bsg_request structure. [SCSI] qla2xxx: Perform fast mailbox read of flash regardless of size nor address alignment. [SCSI] qla2xxx: Correct FCP2 recovery handling. [SCSI] scsi_lib: Fix bug in completion of bidi commands [SCSI] mptsas: Fix issue with chain pools allocation on katmai [SCSI] aacraid: fix File System going into read-only mode [SCSI] lpfc: fix file permissions
| * | | | | | | | [SCSI] fc-transport: Use packed modifier for fc_bsg_request structure.Harish Zunjarrao2010-01-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 32bit kernel does not add padding bytes in the fc_bsg_request structure whereas the 64bit kernel adds padding bytes in the fc_bsg_request structure. Due to this, structure elements gets mismatched with 32bit application and 64bit kernel.To resolve this, used packed modifier to avoid adding padding bytes. Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* | | | | | | | | mm: add new 'read_cache_page_gfp()' helper functionLinus Torvalds2010-01-271-0/+2
| |_|_|/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's a simplified 'read_cache_page()' which takes a page allocation flag, so that different paths can control how aggressive the memory allocations are that populate a address space. In particular, the intel GPU object mapping code wants to be able to do a certain amount of own internal memory management by automatically shrinking the address space when memory starts getting tight. This allows it to dynamically use different memory allocation policies on a per-allocation basis, rather than depend on the (static) address space gfp policy. The actual new function is a one-liner, but re-organizing the helper functions to the point where you can do this with a single line of code is what most of the patch is all about. Tested-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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