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git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing
* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
reiserfs: Safely acquire i_mutex from xattr_rmdir
reiserfs: Safely acquire i_mutex from reiserfs_for_each_xattr
reiserfs: Fix journal mutex <-> inode mutex lock inversion
reiserfs: Fix unwanted recursive reiserfs lock in reiserfs_unlink()
reiserfs: Relax lock before open xattr dir in reiserfs_xattr_set_handle()
reiserfs: Relax reiserfs lock while freeing the journal
reiserfs: Fix reiserfs lock <-> i_mutex dependency inversion on xattr
reiserfs: Warn on lock relax if taken recursively
reiserfs: Fix reiserfs lock <-> i_xattr_sem dependency inversion
reiserfs: Fix remaining in-reclaim-fs <-> reclaim-fs-on locking inversion
reiserfs: Fix reiserfs lock <-> inode mutex dependency inversion
reiserfs: Fix reiserfs lock and journal lock inversion dependency
reiserfs: Fix possible recursive lock
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When we relax the reiserfs lock to avoid creating unwanted
dependencies against others locks while grabbing these,
we want to ensure it has not been taken recursively, otherwise
the lock won't be really relaxed. Only its depth will be decreased.
The unwanted dependency would then actually happen.
To prevent from that, add a reiserfs_lock_check_recursive() call
in the places that need it.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
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i_xattr_sem depends on the reiserfs lock. But after we grab
i_xattr_sem, we may relax/relock the reiserfs lock while waiting
on a freezed filesystem, creating a dependency inversion between
the two locks.
In order to avoid the i_xattr_sem -> reiserfs lock dependency, let's
create a reiserfs_down_read_safe() that acts like
reiserfs_mutex_lock_safe(): relax the reiserfs lock while grabbing
another lock to avoid undesired dependencies induced by the
heivyweight reiserfs lock.
This fixes the following warning:
[ 990.005931] =======================================================
[ 990.012373] [ INFO: possible circular locking dependency detected ]
[ 990.013233] 2.6.33-rc1 #1
[ 990.013233] -------------------------------------------------------
[ 990.013233] dbench/1891 is trying to acquire lock:
[ 990.013233] (&REISERFS_SB(s)->lock){+.+.+.}, at: [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
[ 990.013233]
[ 990.013233] but task is already holding lock:
[ 990.013233] (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
[ 990.013233]
[ 990.013233] which lock already depends on the new lock.
[ 990.013233]
[ 990.013233]
[ 990.013233] the existing dependency chain (in reverse order) is:
[ 990.013233]
[ 990.013233] -> #1 (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}:
[ 990.013233] [<ffffffff81063afc>] __lock_acquire+0xf9c/0x1560
[ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
[ 990.013233] [<ffffffff814ac194>] down_write+0x44/0x80
[ 990.013233] [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
[ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
[ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90
[ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
[ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
[ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
[ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150
[ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
[ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
[ 990.013233]
[ 990.013233] -> #0 (&REISERFS_SB(s)->lock){+.+.+.}:
[ 990.013233] [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560
[ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
[ 990.013233] [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0
[ 990.013233] [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50
[ 990.013233] [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
[ 990.013233] [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180
[ 990.013233] [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470
[ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
[ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90
[ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
[ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
[ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
[ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150
[ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
[ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
[ 990.013233]
[ 990.013233] other info that might help us debug this:
[ 990.013233]
[ 990.013233] 2 locks held by dbench/1891:
[ 990.013233] #0: (&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<ffffffff810e2678>] vfs_setxattr+0x78/0xc0
[ 990.013233] #1: (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470
[ 990.013233]
[ 990.013233] stack backtrace:
[ 990.013233] Pid: 1891, comm: dbench Not tainted 2.6.33-rc1 #1
[ 990.013233] Call Trace:
[ 990.013233] [<ffffffff81061639>] print_circular_bug+0xe9/0xf0
[ 990.013233] [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560
[ 990.013233] [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470
[ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0
[ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
[ 990.013233] [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470
[ 990.013233] [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0
[ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
[ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50
[ 990.013233] [<ffffffff81062592>] ? mark_held_locks+0x72/0xa0
[ 990.013233] [<ffffffff814ab81d>] ? __mutex_unlock_slowpath+0xbd/0x140
[ 990.013233] [<ffffffff810628ad>] ? trace_hardirqs_on_caller+0x14d/0x1a0
[ 990.013233] [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50
[ 990.013233] [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50
[ 990.013233] [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180
[ 990.013233] [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470
[ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150
[ 990.013233] [<ffffffff814abcb4>] ? __mutex_lock_common+0x284/0x3b0
[ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90
[ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0
[ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0
[ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0
[ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150
[ 990.013233] [<ffffffff81056018>] ? sched_clock_cpu+0xb8/0x100
[ 990.013233] [<ffffffff8105eded>] ? trace_hardirqs_off+0xd/0x10
[ 990.013233] [<ffffffff810560a3>] ? cpu_clock+0x43/0x50
[ 990.013233] [<ffffffff810c6820>] ? fget+0xb0/0x110
[ 990.013233] [<ffffffff810c6770>] ? fget+0x0/0x110
[ 990.013233] [<ffffffff81002ddc>] ? sysret_check+0x27/0x62
[ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0
[ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b
Reported-and-tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
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The reiserfs lock -> inode mutex dependency gets inverted when we
relax the lock while walking to the tree.
To fix this, use a specialized version of reiserfs_mutex_lock_safe
that takes care of mutex subclasses. Then we can grab the inode
mutex with I_MUTEX_XATTR subclass without any reiserfs lock
dependency.
This fixes the following report:
[ INFO: possible circular locking dependency detected ]
2.6.32-06793-gf405425-dirty #2
-------------------------------------------------------
mv/18566 is trying to acquire lock:
(&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1110708>] reiserfs_write_lock+0x28=
/0x40
but task is already holding lock:
(&sb->s_type->i_mutex_key#5/3){+.+.+.}, at: [<c111033c>]
reiserfs_for_each_xattr+0x10c/0x380
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&sb->s_type->i_mutex_key#5/3){+.+.+.}:
[<c104f723>] validate_chain+0xa23/0xf70
[<c1050155>] __lock_acquire+0x4e5/0xa70
[<c105075a>] lock_acquire+0x7a/0xa0
[<c134c76f>] mutex_lock_nested+0x5f/0x2b0
[<c11102b4>] reiserfs_for_each_xattr+0x84/0x380
[<c1110615>] reiserfs_delete_xattrs+0x15/0x50
[<c10ef57f>] reiserfs_delete_inode+0x8f/0x140
[<c10a565c>] generic_delete_inode+0x9c/0x150
[<c10a574d>] generic_drop_inode+0x3d/0x60
[<c10a4667>] iput+0x47/0x50
[<c109cc0b>] do_unlinkat+0xdb/0x160
[<c109cca0>] sys_unlink+0x10/0x20
[<c1002c50>] sysenter_do_call+0x12/0x36
-> #0 (&REISERFS_SB(s)->lock){+.+.+.}:
[<c104fc68>] validate_chain+0xf68/0xf70
[<c1050155>] __lock_acquire+0x4e5/0xa70
[<c105075a>] lock_acquire+0x7a/0xa0
[<c134c76f>] mutex_lock_nested+0x5f/0x2b0
[<c1110708>] reiserfs_write_lock+0x28/0x40
[<c1103d6b>] search_by_key+0x1f7b/0x21b0
[<c10e73ef>] search_by_entry_key+0x1f/0x3b0
[<c10e77f7>] reiserfs_find_entry+0x77/0x400
[<c10e81e5>] reiserfs_lookup+0x85/0x130
[<c109a144>] __lookup_hash+0xb4/0x110
[<c109b763>] lookup_one_len+0xb3/0x100
[<c1110350>] reiserfs_for_each_xattr+0x120/0x380
[<c1110615>] reiserfs_delete_xattrs+0x15/0x50
[<c10ef57f>] reiserfs_delete_inode+0x8f/0x140
[<c10a565c>] generic_delete_inode+0x9c/0x150
[<c10a574d>] generic_drop_inode+0x3d/0x60
[<c10a4667>] iput+0x47/0x50
[<c10a1c4f>] dentry_iput+0x6f/0xf0
[<c10a1d74>] d_kill+0x24/0x50
[<c10a396b>] dput+0x5b/0x120
[<c109ca89>] sys_renameat+0x1b9/0x230
[<c109cb28>] sys_rename+0x28/0x30
[<c1002c50>] sysenter_do_call+0x12/0x36
other info that might help us debug this:
2 locks held by mv/18566:
#0: (&sb->s_type->i_mutex_key#5/1){+.+.+.}, at: [<c109b6ac>]
lock_rename+0xcc/0xd0
#1: (&sb->s_type->i_mutex_key#5/3){+.+.+.}, at: [<c111033c>]
reiserfs_for_each_xattr+0x10c/0x380
stack backtrace:
Pid: 18566, comm: mv Tainted: G C 2.6.32-06793-gf405425-dirty #2
Call Trace:
[<c134b252>] ? printk+0x18/0x1e
[<c104e790>] print_circular_bug+0xc0/0xd0
[<c104fc68>] validate_chain+0xf68/0xf70
[<c104c8cb>] ? trace_hardirqs_off+0xb/0x10
[<c1050155>] __lock_acquire+0x4e5/0xa70
[<c105075a>] lock_acquire+0x7a/0xa0
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c134c76f>] mutex_lock_nested+0x5f/0x2b0
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c134b60a>] ? schedule+0x27a/0x440
[<c1110708>] reiserfs_write_lock+0x28/0x40
[<c1103d6b>] search_by_key+0x1f7b/0x21b0
[<c1050176>] ? __lock_acquire+0x506/0xa70
[<c1051267>] ? lock_release_non_nested+0x1e7/0x340
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c104e354>] ? trace_hardirqs_on_caller+0x124/0x170
[<c104e3ab>] ? trace_hardirqs_on+0xb/0x10
[<c1042a55>] ? T.316+0x15/0x1a0
[<c1042d2d>] ? sched_clock_cpu+0x9d/0x100
[<c10e73ef>] search_by_entry_key+0x1f/0x3b0
[<c134bf2a>] ? __mutex_unlock_slowpath+0x9a/0x120
[<c104e354>] ? trace_hardirqs_on_caller+0x124/0x170
[<c10e77f7>] reiserfs_find_entry+0x77/0x400
[<c10e81e5>] reiserfs_lookup+0x85/0x130
[<c1042d2d>] ? sched_clock_cpu+0x9d/0x100
[<c109a144>] __lookup_hash+0xb4/0x110
[<c109b763>] lookup_one_len+0xb3/0x100
[<c1110350>] reiserfs_for_each_xattr+0x120/0x380
[<c110ffe0>] ? delete_one_xattr+0x0/0x1c0
[<c1003342>] ? math_error+0x22/0x150
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c1110615>] reiserfs_delete_xattrs+0x15/0x50
[<c1110708>] ? reiserfs_write_lock+0x28/0x40
[<c10ef57f>] reiserfs_delete_inode+0x8f/0x140
[<c10a561f>] ? generic_delete_inode+0x5f/0x150
[<c10ef4f0>] ? reiserfs_delete_inode+0x0/0x140
[<c10a565c>] generic_delete_inode+0x9c/0x150
[<c10a574d>] generic_drop_inode+0x3d/0x60
[<c10a4667>] iput+0x47/0x50
[<c10a1c4f>] dentry_iput+0x6f/0xf0
[<c10a1d74>] d_kill+0x24/0x50
[<c10a396b>] dput+0x5b/0x120
[<c109ca89>] sys_renameat+0x1b9/0x230
[<c1042d2d>] ? sched_clock_cpu+0x9d/0x100
[<c104c8cb>] ? trace_hardirqs_off+0xb/0x10
[<c1042dde>] ? cpu_clock+0x4e/0x60
[<c1350825>] ? do_page_fault+0x155/0x370
[<c1041816>] ? up_read+0x16/0x30
[<c1350825>] ? do_page_fault+0x155/0x370
[<c109cb28>] sys_rename+0x28/0x30
[<c1002c50>] sysenter_do_call+0x12/0x36
Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
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Merge-reason: The tree was based 2.6.31. It's better to be up to date
with 2.6.32. Although no conflicting changes were made in between,
it gives benchmarking results closer to the lastest kernel behaviour.
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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, ieee1394: update Kconfig help
firewire, ieee1394: update MAINTAINERS entries
firewire: ohci: always use packet-per-buffer mode for isochronous reception
firewire: cdev: fix another memory leak in an error path
firewire: fix use of multiple AV/C devices, allow multiple FCP listeners
Comments from Stefan:
Distributors who still ship the old stack (ieee1394, ohci1394,
raw1394, sbp2, eth1394 and more) should now switch to the new one
(firewire-core, firewire-ohci, firewire-sbp2, firewire-net). In the
first iteration, those distributors might want to ship the old stack
also (but blacklisted) as a fallback for their users if unforeseen
problems with the newer replacement drivers are encountered.
The older FireWire stack contains several known problems which are
not going to be fixed; instead, those issues are addressed by the new
stack. An incomplete list of these issues is kept in bugzilla:
http://bugzilla.kernel.org/show_bug.cgi?id=10046
We have a guide on migration from the older to the newer stack:
http://ieee1394.wiki.kernel.org/index.php/Juju_Migration
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Control of more than one AV/C device at once --- e.g. camcorders, tape
decks, audio devices, TV tuners --- failed or worked only unreliably,
depending on driver implementation. This affected kernelspace and
userspace drivers alike and was caused by firewire-core's inability to
accept multiple registrations of FCP listeners.
The fix allows multiple address handlers to be registered for the FCP
command and response registers. When a request for these registers is
received, all handlers are invoked, and the Firewire response is
generated by the core and not by any handler.
The cdev API does not change, i.e., userspace is still expected to send
a response for FCP requests; this response is silently ignored.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (changelog, rebased, whitespace)
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Fix sign fields in ftrace_define_fields_##call()
tracing/syscalls: Fix typo in SYSCALL_DEFINE0
tracing/kprobe: Show sign of fields in trace_kprobe format files
ksym_tracer: Remove trace_stat
ksym_tracer: Fix race when incrementing count
ksym_tracer: Fix to allow writing newline to ksym_trace_filter
ksym_tracer: Fix to make the tracer work
tracing: Kconfig spelling fixes and cleanups
tracing: Fix setting tracer specific options
Documentation: Update ftrace-design.txt
Documentation: Update tracepoint-analysis.txt
Documentation: Update mmiotrace.txt
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Add is_signed_type() call to trace_define_field() in ftrace macros.
The code previously just passed in 0 (false), disregarding whether
or not the field was actually a signed type.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D3A.6020007@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The struct syscall_metadata variable name in SYSCALL_DEFINE0
should be __syscall_meta__##sname instead of __syscall_meta_##sname
to match the name that is in SYSCALL_DEFINE1/2/3/4/5/6.
This error causes event_enter_##sname->data to point to the wrong
location, which causes syscalls which are defined by SYSCALL_DEFINE0()
not to be traced.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D2E.1010807@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: introduce kernel parameter acpi_sleep=sci_force_enable
ACPI: WMI: Survive BIOS with duplicate GUIDs
dell-wmi - fix condition to abort driver loading
wmi: check find_guid() return value to prevent oops
dell-wmi, hp-wmi, msi-wmi: check wmi_get_event_data() return value
ACPI: hp-wmi, msi-wmi: clarify that wmi_install_notify_handler() returns an acpi_status
dell-wmi: sys_init_module: 'dell_wmi'->init suspiciously returned 21, it should
ACPI video: correct error-handling code
ACPI video: no warning message if "acpi_backlight=vendor" is used
ACPI: fix ACPI=n allmodconfig build
thinkpad-acpi: improve Kconfig help text
thinkpad-acpi: update volume subdriver documentation
thinkpad-acpi: make volume subdriver optional
thinkpad-acpi: don't fail to load the entire module due to ALSA problems
thinkpad-acpi: don't take the first ALSA slot by default
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Introduce kernel parameter acpi_sleep=sci_force_enable
some laptop requires SCI_EN being set directly on resume,
or else they hung somewhere in the resume code path.
We already have a blacklist for these laptops but we still need
this option, especially when debugging some suspend/resume problems,
in case there are systems that need this workaround and are not yet
in the blacklist.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Patch up how we claim metadata blocks for quota purposes
ext4: Ensure zeroout blocks have no dirty metadata
ext4: return correct wbc.nr_to_write in ext4_da_writepages
ext4: Update documentation to correct the inode_readahead_blks option name
jbd2: don't use __GFP_NOFAIL in journal_init_common()
ext4: flush delalloc blocks when space is low
fs-writeback: Add helper function to start writeback if idle
ext4: Eliminate potential double free on error path
ext4: fix unsigned long long printk warning in super.c
ext4, jbd2: Add barriers for file systems with exernal journals
ext4: replace BUG() with return -EIO in ext4_ext_get_blocks
ext4: add module aliases for ext2 and ext3
ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured
ext4: remove unused #include <linux/version.h>
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ext4, at least, would like to start pushing on writeback if it starts
to get close to ENOSPC when reserving worst-case blocks for delalloc
writes. Writing out delalloc data will convert those worst-case
predictions into usually smaller actual usage, freeing up space
before we hit ENOSPC based on this speculation.
Thanks to Jens for the suggestion for the helper function,
& the naming help.
I've made the helper return status on whether writeback was
started even though I don't plan to use it in the ext4 patch;
it seems like it would be potentially useful to test this
in some cases.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Jan Kara <jack@suse.cz>
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This is a bit complicated because we are trying to optimize when we
send barriers to the fs data disk. We could just throw in an extra
barrier to the data disk whenever we send a barrier to the journal
disk, but that's not always strictly necessary.
We only need to send a barrier during a commit when there are data
blocks which are must be written out due to an inode written in
ordered mode, or if fsync() depends on the commit to force data blocks
to disk. Finally, before we drop transactions from the beginning of
the journal during a checkpoint operation, we need to guarantee that
any blocks that were flushed out to the data disk are firmly on the
rust platter before we drop the transaction from the journal.
Thanks to Oleg Drokin for pointing out this flaw in ext3/ext4.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI/cardbus: Add a fixup hook and fix powerpc
PCI: change PCI nomenclature in drivers/pci/ (non-comment changes)
PCI: change PCI nomenclature in drivers/pci/ (comment changes)
PCI: fix section mismatch on update_res()
PCI: add Intel 82599 Virtual Function specific reset method
PCI: add Intel USB specific reset method
PCI: support device-specific reset methods
PCI: Handle case when no pci device can provide cache line size hint
PCI/PM: Propagate wake-up enable for PCIe devices too
vgaarbiter: fix a typo in the vgaarbiter Documentation
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The cardbus code creates PCI devices without ever going through the
necessary fixup bits and pieces that normal PCI devices go through.
There's in fact a commented out call to pcibios_fixup_bus() in there,
it's commented because ... it doesn't work.
I could make pcibios_fixup_bus() do the right thing on powerpc easily
but I felt it cleaner instead to provide a specific hook pci_fixup_cardbus
for which a weak empty implementation is provided by the PCI core.
This fixes cardbus on powerbooks and probably all other PowerPC
platforms which was broken completely for ever on some platforms and
since 2.6.31 on others such as PowerBooks when we made the DMA ops
mandatory (since those are setup by the fixups).
Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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It's DECLARE_KFIFO, not DECLARED_KFIFO.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
block: blk_rq_err_sectors cleanup
block: Honor the gfp_mask for alloc_page() in blkdev_issue_discard()
block: Fix incorrect alignment offset reporting and update documentation
cfq-iosched: don't regard requests with long distance as close
aoe: switch to the new bio_flush_dcache_pages() interface
drivers/block/mg_disk.c: use resource_size()
drivers/block/DAC960.c: use DAC960_V2_Controller
block: Fix topology stacking for data and discard alignment
drbd: remove unused #include <linux/version.h>
drbd: remove duplicated #include
drbd: Fix test of unsigned in _drbd_fault_random()
drbd: Constify struct file_operations
cfq-iosched: Remove prio_change logic for workload selection
cfq-iosched: Get rid of nr_groups
cfq-iosched: Remove the check for same cfq group from allow_merge
drbd: fix test of unsigned in _drbd_fault_random()
block: remove Documentation/block/as-iosched.txt
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blk_rq_err_sectors() seems useless, get rid of it.
Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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queue_sector_alignment_offset returned the wrong value which caused
partitions to report an incorrect alignment_offset. Since offset
alignment calculation is needed several places it has been split into a
separate helper function. The topology stacking function has been
updated accordingly.
Furthermore, comments have been added to clarify how the stacking
function works.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Tested-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (74 commits)
Revert "b43: Enforce DMA descriptor memory constraints"
iwmc3200wifi: fix array out-of-boundary access
wl1251: timeout one too soon in wl1251_boot_run_firmware()
mac80211: fix propagation of failed hardware reconfigurations
mac80211: fix race with suspend and dynamic_ps_disable_work
ath9k: fix missed error codes in the tx status check
ath9k: wake hardware during AMPDU TX actions
ath9k: wake hardware for interface IBSS/AP/Mesh removal
ath9k: fix suspend by waking device prior to stop
cfg80211: fix error path in cfg80211_wext_siwscan
wl1271_cmd.c: cleanup char => u8
iwlwifi: Storage class should be before const qualifier
ath9k: Storage class should be before const qualifier
cfg80211: fix race between deauth and assoc response
wireless: remove remaining qual code
rt2x00: Add USB ID for Linksys WUSB 600N rev 2.
ath5k: fix SWI calibration interrupt storm
mac80211: fix ibss join with fixed-bssid
libertas: Remove carrier signaling from the scan code
orinoco: fix GFP_KERNEL in orinoco_set_key with interrupts disabled
...
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
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This removes the remaining users of the rx status
'qual' field and the field itself.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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when using policy routing and the skb mark:
there are cases where a back path validation requires us
to use a different routing table for src ip validation than
the one used for mapping ingress dst ip.
One such a case is transparent proxying where we pretend to be
the destination system and therefore the local table
is used for incoming packets but possibly a main table would
be used on outbound.
Make the default behavior to allow the above and if users
need to turn on the symmetry via sysctl src_valid_mark
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
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I noticed yesterday, because Jeff had noticed
a speed regression, cf. bug
http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2138
that the SM PS settings for peers were wrong.
Instead of overwriting the SM PS settings with
the local bits, we need to keep the remote bits.
The bug was part of the original HT code from
over two years ago, but unfortunately nobody
noticed that it makes no sense -- we shouldn't
be overwriting the peer's setting with our own
but rather keep it intact when masking the peer
capabilities with our own.
While fixing that, I noticed that the masking of
capabilities is completely useless for most of
the bits, so also fix those other bits.
Finally, I also noticed that PSMP_SUPPORT no
longer exists in the final 802.11n version, so
also remove that.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Add a definition of the amount of TX headroom reserved by mac80211 itself
for its own purposes. Also add BUILD_BUG_ON to validate the value.
This define can then be used by drivers to request additional TX headroom
in the most efficient manner.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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commit 45465487897a1c6d508b14b904dc5777f7ec7e04 ("kfifo: move struct
kfifo in place") caused a compile failure in ibmvscsitgt.c because it
changed a pointer to kfifo in the libsrp.h structure to a direct
inclusion without including <linux/kfifo.h>.
The fix is simple, just add the include, but how did this happen? This
change, introduced at -rc2, hardly looks like a bug fix, and it clearly
didn't go through linux-next, which would have picked up this compile
failure (it only occurs on ppc because of the ibm virtual scsi target).
[ Apparently all of -mm wasn't in linux-next.. ]
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (34 commits)
classmate-laptop: add support for Classmate PC ACPI devices
hp-wmi: Fix two memleaks
acer-wmi, msi-wmi: Remove needless DMI MODULE_ALIAS
dell-wmi: do not keep driver loaded on unsupported boxes
wmi: Free the allocated acpi objects through wmi_get_event_data
drivers/platform/x86/acerhdf.c: check BIOS information whether it begins with string of table
acerhdf: add new BIOS versions
acerhdf: limit modalias matching to supported
toshiba_acpi: convert to seq_file
asus_acpi: convert to seq_file
ACPI: do not select ACPI_DOCK from ATA_ACPI
sony-laptop: enumerate rfkill devices using SN06
sony-laptop: rfkill support for newer models
ACPI: fix OSC regression that caused aer and pciehp not to load
MAINTAINERS: add maintainer for msi-wmi driver
fujitu-laptop: fix tests of acpi_evaluate_integer() return value
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any()
ACPI: processor: remove _PDC object list from struct acpi_processor
ACPI: processor: change acpi_processor_set_pdc() interface
ACPI: processor: open code acpi_processor_cleanup_pdc
...
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Some models are equipped with an "AVMode" function key that sends
sony-laptop: Unknown event: 0x100 0xa1
sony-laptop: Unknown event: 0x100 0x21
for press and release respectively.
Cc: "Matthew W. S. Bell" <matthew@bells23.org.uk>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
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When we call _PDC, we get a handle to the processor, allocate the
object list buffer as needed, and free it immediately after calling
_PDC.
There's no need to drag around this object list with us everywhere
else, so let's just get rid of it.
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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When calling _PDC, we really only need the handle to the processor
to call the method; we don't look at any other parts of the
struct acpi_processor * given to us.
In the early path, when we walk the namespace, we are given the
handle directly, so just pass it through to acpi_processor_set_pdc()
without stuffing it into a wasteful struct acpi_processor allocated
on the stack each time
This saves 2834 bytes of stack.
Update the interface accordingly.
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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The x86 and ia64 implementations of the function in $subject are
exactly the same.
Also, since the arch-specific implementations of setting _PDC have
been completely hollowed out, remove the empty shells.
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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The only thing arch-specific about calling _PDC is what bits get
set in the input obj_list buffer.
There's no need for several levels of indirection to twiddle those
bits. Additionally, since we're just messing around with a buffer,
we can simplify the interface; no need to pass around the entire
struct acpi_processor * just to get at the buffer.
Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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release
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We discovered that at least one machine (HP Envy), methods in the DSDT
attempt to call external methods defined in a dynamically loaded SSDT.
Unfortunately, the DSDT methods we are trying to call are part of the
EC initialization, which happens very early, and the the dynamic SSDT
is only loaded when a processor _PDC method runs much later.
This results in namespace lookup errors for the (as of yet) undefined
methods.
Since Windows doesn't have any issues with this machine, we take it
as a hint that they must be evaluating _PDC much earlier than we are.
Thus, the proper thing for Linux to do should be to match the Windows
implementation more closely.
Provide a mechanism to call _PDC before we enable the EC. Doing so loads
the dynamic tables, and allows the EC to be enabled correctly.
The ACPI processor driver will still evaluate _PDC in its .add() method
to cover the hotplug case.
Resolves: http://bugzilla.kernel.org/show_bug.cgi?id=14824
Cc: ming.m.lin@intel.com
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2/trivial: Use le16_to_cpu for a disk value in xattr.c
ocfs2/trivial: Use proper mask for 2 places in hearbeat.c
Ocfs2: Let ocfs2 support fiemap for symlink and fast symlink.
Ocfs2: Should ocfs2 support fiemap for S_IFDIR inode?
ocfs2: Use FIEMAP_EXTENT_SHARED
fiemap: Add new extent flag FIEMAP_EXTENT_SHARED
ocfs2: replace u8 by __u8 in ocfs2_fs.h
ocfs2: explicit declare uninitialized var in user_cluster_connect()
ocfs2-devel: remove redundant OCFS2_MOUNT_POSIX_ACL check in ocfs2_get_acl_nolock()
ocfs2: return -EAGAIN instead of EAGAIN in dlm
ocfs2/cluster: Make fence method configurable - v2
ocfs2: Set MS_POSIXACL on remount
ocfs2: Make acl use the default
ocfs2: Always include ACL support
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Some filesystems may allow multiple files to point to a particular
extent. This patch adds flag FIEMAP_EXTENT_SHARED to denote extents
that are shared with other inodes.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
devtmpfs: unlock mutex in case of string allocation error
Driver core: export platform_device_register_data as a GPL symbol
driver core: Prevent reference to freed memory on error path
Driver-core: Fix bogus 0 error return in device_add()
Driver core: driver_attribute parameters can often be const*
Driver core: bin_attribute parameters can often be const*
Driver core: device_attribute parameters can often be const*
Doc/stable rules: add new cherry-pick logic
vfs: get_sb_single() - do not pass options twice
devtmpfs: Convert dirlock to a mutex
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Many struct driver_attribute descriptors are purely read-only
structures, and there's no need to change them. Therefore make
the promise not to, which will let those descriptors be put in
a ro section.
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Many struct bin_attribute descriptors are purely read-only
structures, and there's no need to change them. Therefore
make the promise not to, which will let those descriptors
be put in a ro section.
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Most device_attributes are const, and are begging to be
put in a ro section. However, the create and remove
file interfaces were failing to propagate the const promise
which the only functions they call offer.
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
Staging/vt66*: kconfig, depends on WLAN
Staging: batman-adv: introduce missing kfree
Staging: batman-adv: Add Kconfig dependancies on PROC_FS and PACKET.
Staging: panel: Adjust range for PANEL_KEYPAD in Kconfig
Staging: panel: Fix compilation error with custom lcd charset
Staging: ramzswap: remove ARM specific d-cache hack
Staging: rtl8192x: fix printk formats
Staging: wlan-ng: fix Correct size given to memset
staging: rtl8192su: add USB VID/PID for HWNUm-300
staging: fix rtl8192su compilation errors with mac80211
staging: fix rtl8192e compilation errors with mac80211
Staging: fix rtl8187se compilation errors with mac80211
Staging: rtl8192su: fix test for negative error in rtl8192_rx_isr()
Staging: comedi: jr3_pci: Don't ioremap too much space. Check result.
Staging: comedi: removed "depricated" from COMEDI_CB_BLOCK
Staging: comedi: usbdux.c: fix locking up of the driver when the comedi ringbuffer runs empty
Staging: dst: remove from the tree
Staging: sm7xx: add a new framebuffer driver
Staging: batman: fix debug Kconfig option
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DST is dead, no one is using it and upstream
has abandoned it, so remove it from the tree because
it is not going anywhere.
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Fix kernel-doc errors and warnings in new header file kfifo.h.
Don't use kernel-doc "/**" for internal functions whose comments
are not in kernel-doc format.
kernel-doc section header names (like "Note:") must be unique
per function. Looks like I need to document that.
Error(include/linux/kfifo.h:76): duplicate section name 'Note'
Warning(include/linux/kfifo.h:88): Excess function parameter 'size' description in 'INIT_KFIFO'
Error(include/linux/kfifo.h:101): duplicate section name 'Note'
Warning(include/linux/kfifo.h:257): No description found for parameter 'fifo'
(many of this last type, from internal functions)
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
quota: Improve checking of quota file header
jbd: jbd-debug and jbd2-debug should be writable
ext4: fix sleep inside spinlock issue with quota and dealloc (#14739)
ext4: Fix potential quota deadlock
quota: Fix 64-bit limits setting on 32-bit archs
ext3: Replace lock/unlock_super() with an explicit lock for resizing
ext3: Replace lock/unlock_super() with an explicit lock for the orphan list
ext3: ext3_mark_recovery_complete() doesn't need to use lock_super
ext3: Remove outdated comment about lock_super()
quota: Move duplicated code to separate functions
ext4: Convert to generic reserved quota's space management.
quota: decouple fs reserved space from quota reservation
Add unlocked version of inode_add_bytes() function
ext3: quota macros cleanup [V2]
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Use a separate lock to protect s_groups_count and the other block
group descriptors which get changed via an on-line resize operation,
so we can stop overloading the use of lock_super().
Port of ext4 commit 32ed5058ce90024efcd811254b4b1de0468099df by
Theodore Ts'o <tytso@mit.edu>.
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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