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* [PATCH] mm/msync.c cleanupOGAWA Hirofumi2005-10-291-14/+14
| | | | | | | | | | | | This is not problem actually, but sync_page_range() is using for exported function to filesystems. The msync_xxx is more readable at least to me. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Remove near all BUGs in mm/mempolicy.cAndi Kleen2005-10-291-7/+2
| | | | | | | | Most of them can never be triggered and were only for development. Signed-off-by: "Andi Kleen" <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Convert mempolicies to nodemask_tAndi Kleen2005-10-291-67/+53
| | | | | | | | | | | The NUMA policy code predated nodemask_t so it used open coded bitmaps. Convert everything to nodemask_t. Big patch, but shouldn't have any actual behaviour changes (except I removed one unnecessary check against node_online_map and one unnecessary BUG_ON) Signed-off-by: "Andi Kleen" <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: set per-cpu-pages lower threshold to zeroSeth, Rohit2005-10-291-2/+2
| | | | | | | | | | | | | | Set the low water mark for hot pages in pcp to zero. (akpm: for the life of me I cannot remember why we created pcp->low. Neither can Martin and the changelog is silent. Maybe it was just a brainfart, but I have this feeling that there was a reason. If not, we should remove the fields completely. We'll see.) Signed-off-by: Rohit Seth <rohit.seth@intel.com> Cc: <linux-mm@kvack.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: page_alloc: increase size of per-cpu-pagesSeth, Rohit2005-10-291-12/+12
| | | | | | | | | | | | Increase the page allocator's per-cpu magazines from 1/4MB to 1/2MB. Over 100+ runs for a workload, the difference in mean is about 2%. The best results for both are almost same. Though the max variation in results with 1/2MB is only 2.2%, whereas with 1/4MB it is 12%. Signed-off-by: Rohit Seth <rohit.seth@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] swaptoken tuningRik Van Riel2005-10-292-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that the original swap token implementation, by Song Jiang, only enforced the swap token while the task holding the token is handling a page fault. This patch approximates that, without adding an additional flag to the mm_struct, by checking whether the mm->mmap_sem is held for reading, like the page fault code does. This patch has the effect of automatically, and gradually, disabling the enforcement of the swap token when there is little or no paging going on, and "turning up" the intensity of the swap token code the more the task holding the token is thrashing. Thanks to Song Jiang for pointing out this aspect of the token based thrashing control concept. The new code shows a slight degradation over the old swap token code, but still a big win over running without the swap token. 2.6.12+ swap token disabled $ for i in `seq 10` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done 101.74user 23.13system 8:26.91elapsed 24%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (38597major+430315minor)pagefaults 0swaps 101.98user 24.91system 8:03.06elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (33939major+430457minor)pagefaults 0swaps 101.93user 22.12system 7:34.90elapsed 27%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (33166major+421267minor)pagefaults 0swaps 101.82user 22.38system 8:31.40elapsed 24%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (39338major+433262minor)pagefaults 0swaps 2.6.12+ swap token enabled, timeout 300 seconds $ for i in `seq 4` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done 102.58user 16.08system 3:41.44elapsed 53%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (19707major+285786minor)pagefaults 0swaps 102.07user 19.56system 4:00.64elapsed 50%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (19012major+299259minor)pagefaults 0swaps 102.64user 18.25system 4:07.31elapsed 48%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (21990major+304831minor)pagefaults 0swaps 101.39user 19.41system 5:15.81elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (24850major+323321minor)pagefaults 0swaps 2.6.12+ with new swap token code, timeout 300 seconds $ for i in `seq 4` ; do /usr/bin/time ./qsbench -n 30000000 -p 3 ; done 101.87user 24.66system 5:53.20elapsed 35%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (26848major+363497minor)pagefaults 0swaps 102.83user 19.95system 4:17.25elapsed 47%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (19946major+305722minor)pagefaults 0swaps 102.09user 19.46system 5:12.57elapsed 38%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (25461major+334994minor)pagefaults 0swaps 101.67user 20.61system 4:52.97elapsed 41%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (22190major+329508minor)pagefaults 0swaps Signed-off-by: Rik Van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] vmalloc_nodeChristoph Lameter2005-10-291-16/+57
| | | | | | | | | | | | | | | This patch adds vmalloc_node(size, node) -> Allocate necessary memory on the specified node and get_vm_area_node(size, flags, node) and the other functions that it depends on. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] gfp_t: the restAl Viro2005-10-282-19/+24
| | | | | | | zone handling, mapping->flags handling Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] gfp_t: mm/* (easy parts)Al Viro2005-10-285-15/+15
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] gfp_t: infrastructureAl Viro2005-10-282-5/+5
| | | | | | | | | | | | | | | | Beginning of gfp_t annotations: - -Wbitwise added to CHECKFLAGS - old __bitwise renamed to __bitwise__ - __bitwise defined to either __bitwise__ or nothing, depending on __CHECK_ENDIAN__ being defined - gfp_t switched from __nocast to __bitwise__ - force cast to gfp_t added to __GFP_... constants - new helper - gfp_zone(); extracts zone bits out of gfp_t value and casts the result to int Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] NUMA: broken per cpu pageset countersMagnus Damm2005-10-261-0/+2
| | | | | | | | | | | The NUMA counters in struct per_cpu_pageset (linux/mmzone.h) are never cleared today. This works ok for CPU 0 on NUMA machines because boot_pageset[] is already zero, but for other CPU:s this results in uninitialized counters. Signed-off-by: Magnus Damm <magnus@valinux.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix handling spurious page fault for hugetlb regionHugh Dickins2005-10-202-12/+24
| | | | | | | | | | This reverts commit 3359b54c8c07338f3a863d1109b42eebccdcf379 and replaces it with a cleaner version that is purely based on page table operations, so that the synchronization between inode size and hugetlb mappings becomes moot. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] swiotlb: make sure initial DMA allocations really are in DMA memoryYasunori Goto2005-10-191-10/+21
| | | | | | | | | | | | | | | | | | | | | | | This introduces a limit parameter to the core bootmem allocator; The new parameter indicates that physical memory allocated by the bootmem allocator should be within the requested limit. We also introduce alloc_bootmem_low_pages_limit, alloc_bootmem_node_limit, alloc_bootmem_low_pages_node_limit apis, but alloc_bootmem_low_pages_limit is the only api used for swiotlb. The existing alloc_bootmem_low_pages() api could instead have been changed and made to pass right limit to the core allocator. But that would make the patch more intrusive for 2.6.14, as other arches use alloc_bootmem_low_pages(). We may be done that post 2.6.14 as a cleanup. With this, swiotlb gets memory within 4G for both x86_64 and ia64 arches. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Ravikiran G Thirumalai <kiran@scalex86.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: hugetlb truncation fixesHugh Dickins2005-10-191-14/+21
| | | | | | | | | | | | | | | | hugetlbfs allows truncation of its files (should it?), but hugetlb.c often forgets that: crashes and misaccounting ensue. copy_hugetlb_page_range better grab the src page_table_lock since we don't want to guess what happens if concurrently truncated. unmap_hugepage_range rss accounting must not assume the full range was mapped. follow_hugetlb_page must guard with page_table_lock and be prepared to exit early. Restyle copy_hugetlb_page_range with a for loop like the others there. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Handle spurious page fault for hugetlb regionSeth, Rohit2005-10-191-2/+12
| | | | | | | | | | | | | | | | | | | | The hugetlb pages are currently pre-faulted. At the time of mmap of hugepages, we populate the new PTEs. It is possible that HW has already cached some of the unused PTEs internally. These stale entries never get a chance to be purged in existing control flow. This patch extends the check in page fault code for hugepages. Check if a faulted address falls with in size for the hugetlb file backing it. We return VM_FAULT_MINOR for these cases (assuming that the arch specific page-faulting code purges the stale entry for the archs that need it). Signed-off-by: Rohit Seth <rohit.seth@intel.com> [ This is apparently arguably an ia64 port bug. But the code won't hurt, and for now it fixes a real problem on some ia64 machines ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Fix memory ordering bug in page reclaimLinus Torvalds2005-10-161-4/+9
| | | | | | | | | | | | | | As noticed by Nick Piggin, we need to make sure that we check the page count before we check for PageDirty, since the dirty check is only valid if the count implies that we're the only possible ones holding the page. We always did do this, but the code needs a read-memory-barrier to make sure that the orderign is also honored by the CPU. (The writer side is ordered due to the atomic decrement and test on the page count, see the discussion on linux-kernel) Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Don't map the same page too muchHugh Dickins2005-10-111-0/+3
| | | | | | | | | | | Refuse to install a page into a mapping if the mapping count is already ridiculously large. You probably cannot trigger this on 32-bit architectures, but on a 64-bit setup we should protect against it. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] madvise: Avoid returning error code -EBADF for anonymous mappingsSuzuki2005-10-111-7/+4
| | | | | | | | | | | | | | Revert this recent correctness change: Douglas Crosher <dcrosher@scieneer.com> reported that it broke an existing application, and that madvise() works without error on anonymous mappings on Solaris. This means that madvise() will remain non-standards-compliant: we should return -EBADF for all requests against non-file-backed vma's, but Linux only does this for MADV_WILLNEED requests. Signed-off-by: Suzuki K P <suzuki@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] gfp flags annotations - part 1Al Viro2005-10-0811-41/+37
| | | | | | | | | | | | - added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Revert "x86-64: Reverse order of bootmem lists"Linus Torvalds2005-09-301-11/+3
| | | | | | | | | | | | | As requested by Thomas Gleixner <tglx@linutronix.de>: "5d3d0f7704ed0bc7eaca0501eeae3e5da1ea6c87 breaks a couple of ARM boards, which depend on the historical bootmem allocation order. There is a cleaner solution around to remove the pgdat list completely, but this is a topic for post 2.6.14 Andi signalled ACK already." Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kmalloc_node IRQ safety fixAlok N Kataria2005-09-281-7/+18
| | | | | | | | | | | | | | In kmalloc_node we are checking if the allocation is for the same node when interrupts are "on". This may lead to an allocation on another node than intended. This patch just shifts the check for the current node in __cache_alloc_node when interrupts are disabled. Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: move_pte to remap ZERO_PAGENick Piggin2005-09-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | Move the ZERO_PAGE remapping complexity to the move_pte macro in asm-generic, have it conditionally depend on __HAVE_ARCH_MULTIPLE_ZERO_PAGE, which gets defined for MIPS. For architectures without __HAVE_ARCH_MULTIPLE_ZERO_PAGE, move_pte becomes a noop. From: Hugh Dickins <hugh@veritas.com> Fix nasty little bug we've missed in Nick's mremap move ZERO_PAGE patch. The "pte" at that point may be a swap entry or a pte_file entry: we must check pte_present before perhaps corrupting such an entry. Patch below against 2.6.14-rc2-mm1, but the same bug is in 2.6.14-rc2's mm/mremap.c, and more dangerous there since it's affecting all arches: I think the safest course is to send Nick's patch and Yoichi's build fix and this fix (build tested) on to Linus - so only MIPS can be affected. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] revert oversized kmalloc checkAndrew Morton2005-09-231-1/+2
| | | | | | | | | | | | | | | | As davem points out, this wasn't such a great idea. There may be some code which does: size = 1024*1024; while (kmalloc(size, ...) == 0) size /= 2; which will now explode. Cc: "David S. Miller" <davem@davemloft.net> Cc: Christoph Lameter <christoph@lameter.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix bd_claim() error code.Rob Landley2005-09-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | Problem: In some circumstances, bd_claim() is returning the wrong error code. If we try to swapon an unused block device that isn't swap formatted, we get -EINVAL. But if that same block device is already mounted, we instead get -EBUSY, even though it still isn't a valid swap device. This issue came up on the busybox list trying to get the error message from "swapon -a" right. If a swap device is already enabled, we get -EBUSY, and we shouldn't report this as an error. But we can't distinguish the two -EBUSY conditions, which are very different errors. In the code, bd_claim() returns either 0 or -EBUSY, but in this case busy means "somebody other than sys_swapon has already claimed this", and _that_ means this block device can't be a valid swap device. So return -EINVAL there. Signed-off-by: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] __kmalloc: Generate BUG if size requested is too large.Christoph Lameter2005-09-221-2/+1
| | | | | | | | | | | | | | | | I had an issue on ia64 where I got a bug in kernel/workqueue because kzalloc returned a NULL pointer due to the task structure getting too big for the slab allocator. Usually these cases are caught by the kmalloc macro in include/linux/slab.h. Compilation will fail if a too big value is passed to kmalloc. However, kzalloc uses __kmalloc which has no check for that. This patch makes __kmalloc bug if a too large entity is requested. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: fix handling of pages from foreign NUMA nodesChristoph Lameter2005-09-221-19/+19
| | | | | | | | | | | | | | | | | | The numa slab allocator may allocate pages from foreign nodes onto the lists for a particular node if a node runs out of memory. Inspecting the slab->nodeid field will not reflect that the page is now in use for the slabs of another node. This patch fixes that issue by adding a node field to free_block so that the caller can indicate which node currently uses a slab. Also removes the check for the current node from kmalloc_cache_node since the process may shift later to another node which may lead to an allocation on another node than intended. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] slab: alpha inlining fixIvan Kokshaysky2005-09-221-3/+4
| | | | | | | | | | It is essential that index_of() be inlined. But alpha undoes the gcc inlining hackery and index_of() ends up out-of-line. So fiddle with things to make that function inline again. Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: add a note about partially hardcoded VM_* flagsPaolo 'Blaisorblade' Giarrusso2005-09-211-1/+2
| | | | | | | | | | | | | | | | | Hugh made me note this line for permission checking in mprotect(): if ((newflags & ~(newflags >> 4)) & 0xf) { after figuring out what's that about, I decided it's nasty enough. Btw Hugh itself didn't like the 0xf. We can safely change it to VM_READ|VM_WRITE|VM_EXEC because we never change VM_SHARED, so no need to check that. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix locking comment in unmap_region()Paolo 'Blaisorblade' Giarrusso2005-09-211-1/+1
| | | | | | | | | | That comment is plain wrong (we even take the pagetable lock inside unmap_region()). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fix mm/Kconfig spellingDave Hansen2005-09-171-2/+2
| | | | | | Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix slab BUG_ON() triggered by change in array cache sizeAlok Kataria2005-09-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the new changes that we made in the initialization of the slab allocator, we first setup the cache from which array caches are allocated, and then the cache, from which kmem_list3's are allocated. Now if the array cache comes from a cache in which objsize > 32, (in this instance size-64) then, first size-64 cache will be allocated and then the size-128 (if this is the cache from which kmem_list3's are going to be allocated). So with these new changes, we are not guaranteed that we will be initializing the malloc_sizes array in a serialized order. Thus there is a bug in __find_general_cachep, as we are checking whether the first cache_sizes ptr is NULL. This is replaced by checking whether the array-cache cache is initialized. Attached is a patch which does that. Boots fine on a x86-64, with DEBUG_SPIN, DEBUG_SLAB, and preempt. Attached is a patch which does that. Boots fine on a x86-64, with DEBUG_SPIN, DEBUG_SLAB, and preempt.Thanks & Regards, Alok Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Shobhit Dayal <shobhitdayal.com> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Christoph Lameter <christoph@lameter.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] error path in setup_arg_pages() misses vm_unacct_memory()Hugh Dickins2005-09-141-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Pavel Emelianov and Kirill Korotaev observe that fs and arch users of security_vm_enough_memory tend to forget to vm_unacct_memory when a failure occurs further down (typically in setup_arg_pages variants). These are all users of insert_vm_struct, and that reservation will only be unaccounted on exit if the vma is marked VM_ACCOUNT: which in some cases it is (hidden inside VM_STACK_FLAGS) and in some cases it isn't. So x86_64 32-bit and ppc64 vDSO ELFs have been leaking memory into Committed_AS each time they're run. But don't add VM_ACCOUNT to them, it's inappropriate to reserve against the very unlikely case that gdb be used to COW a vDSO page - we ought to do something about that in do_wp_page, but there are yet other inconsistencies to be resolved. The safe and economical way to fix this is to let insert_vm_struct do the security_vm_enough_memory check when it finds VM_ACCOUNT is set. And the MIPS irix_brk has been calling security_vm_enough_memory before calling do_brk which repeats it, doubly accounting and so also leaking. Remove that, and all the fs and arch calls to security_vm_enough_memory: give it a less misleading name later on. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] use add_taint() for setting tainted bit flagsRandy Dunlap2005-09-131-1/+2
| | | | | | | | | Use the add_taint() interface for setting tainted bit flags instead of doing it manually. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix MPOL_F_VERIFYAndi Kleen2005-09-131-1/+6
| | | | | | | | | | | | There was a pretty bad bug in there that the code would always check the full VMA, not the range the user requested. When the VMA to be checked was merged with the previous VMA this could lead to spurious failures. Signed-off-by: "Andi Kleen" <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] vm: kswapd cleanup: use pgdatCon Kolivas2005-09-131-2/+2
| | | | | | | | Use the pgdat pointer we've already defined in wakeup_kswapd Signed-off-by: Con Kolivas <kernel@kolivas.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86-64: Reverse order of bootmem listsAndi Kleen2005-09-121-3/+11
| | | | | | | | | | | | This leads to bootmem allocating first from node 0 instead of from the last node. This avoids swiotlb allocating on the last node, which doesn't really work on a machine with >4GB. Note: there is a better patch around from someone else that gets rid of the pgdat list completely. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uclinux: add NULL check, 0 end valid check and some more exports to ↵Greg Ungerer2005-09-111-4/+13
| | | | | | | | | | | | | | | | | | | | | | nommu.c Move call to get_mm_counter() in update_mem_hiwater() to be inside the check for tsk->mm being null. Otherwise you can be following a null pointer here. This patch submitted by Javier Herrero <jherrero@hvsistemas.es>. Modify the end check for munmap regions to allow for the legacy behavior of 0 being valid. Pretty much all current uClinux system libc malloc's pass in 0 as the end point. A hard check will fail on these, so change the check so that if it is non-zero it must be valid otherwise it fails. A passed in value will always succeed (as it used too). Also export a few more mm system functions - to be consistent with the VM code exports. Signed-off-by: Greg Ungerer <gerg@uclinux.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm: fix-up schedule_timeout() usageNishanth Aravamudan2005-09-102-4/+2
| | | | | | | | | Use schedule_timeout_{,un}interruptible() instead of set_current_state()/schedule_timeout() to reduce kernel size. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] remove invalid comment in mm/page_alloc.cRenaud Lienhart2005-09-101-1/+1
| | | | | | | | free_pages_bulk() doesn't free the entire list if count == 0. Signed-off-by: Renaud Lienhart <renaud.lienhart@free.fr> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm/swap_state: Fix "nocast type" warningsVictor Fusco2005-09-101-2/+2
| | | | | | | | | Fix the sparse warning "implicit cast to nocast type" Signed-off-by: Victor Fusco <victor@cetuc.puc-rio.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm/slab: fix sparse warningsVictor Fusco2005-09-101-2/+2
| | | | | | | | | Fix the sparse warning "implicit cast to nocast type" Signed-off-by: Victor Fusco <victor@cetuc.puc-rio.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] mm/filemap.c: make two functions staticAdrian Bunk2005-09-102-8/+11
| | | | | | | | | | | With Nick Piggin <npiggin@suse.de> Give some things static scope. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] timer initialization cleanup: DEFINE_TIMERIngo Molnar2005-09-091-4/+2
| | | | | | | | | | Clean up timer initialization by introducing DEFINE_TIMER a'la DEFINE_SPINLOCK. Build and boot-tested on x86. A similar patch has been been in the -RT tree for some time. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] update kfree, vfree, and vunmap kerneldocPekka Enberg2005-09-092-3/+6
| | | | | | | | | | | This patch clarifies NULL handling of kfree() and vfree(). I addition, wording of calling context restriction for vfree() and vunmap() are changed from "may not" to "must not." Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Numa-aware slab allocator V5Christoph Lameter2005-09-091-320/+812
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NUMA API change that introduced kmalloc_node was accepted for 2.6.12-rc3. Now it is possible to do slab allocations on a node to localize memory structures. This API was used by the pageset localization patch and the block layer localization patch now in mm. The existing kmalloc_node is slow since it simply searches through all pages of the slab to find a page that is on the node requested. The two patches do a one time allocation of slab structures at initialization and therefore the speed of kmalloc node does not matter. This patch allows kmalloc_node to be as fast as kmalloc by introducing node specific page lists for partial, free and full slabs. Slab allocation improves in a NUMA system so that we are seeing a performance gain in AIM7 of about 5% with this patch alone. More NUMA localizations are possible if kmalloc_node operates in an fast way like kmalloc. Test run on a 32p systems with 32G Ram. w/o patch Tasks jobs/min jti jobs/min/task real cpu 1 485.36 100 485.3640 11.99 1.91 Sat Apr 30 14:01:51 2005 100 26582.63 88 265.8263 21.89 144.96 Sat Apr 30 14:02:14 2005 200 29866.83 81 149.3342 38.97 286.08 Sat Apr 30 14:02:53 2005 300 33127.16 78 110.4239 52.71 426.54 Sat Apr 30 14:03:46 2005 400 34889.47 80 87.2237 66.72 568.90 Sat Apr 30 14:04:53 2005 500 35654.34 76 71.3087 81.62 714.55 Sat Apr 30 14:06:15 2005 600 36460.83 75 60.7681 95.77 853.42 Sat Apr 30 14:07:51 2005 700 35957.00 75 51.3671 113.30 990.67 Sat Apr 30 14:09:45 2005 800 33380.65 73 41.7258 139.48 1140.86 Sat Apr 30 14:12:05 2005 900 35095.01 76 38.9945 149.25 1281.30 Sat Apr 30 14:14:35 2005 1000 36094.37 74 36.0944 161.24 1419.66 Sat Apr 30 14:17:17 2005 w/patch Tasks jobs/min jti jobs/min/task real cpu 1 484.27 100 484.2736 12.02 1.93 Sat Apr 30 15:59:45 2005 100 28262.03 90 282.6203 20.59 143.57 Sat Apr 30 16:00:06 2005 200 32246.45 82 161.2322 36.10 282.89 Sat Apr 30 16:00:42 2005 300 37945.80 83 126.4860 46.01 418.75 Sat Apr 30 16:01:28 2005 400 40000.69 81 100.0017 58.20 561.48 Sat Apr 30 16:02:27 2005 500 40976.10 78 81.9522 71.02 696.95 Sat Apr 30 16:03:38 2005 600 41121.54 78 68.5359 84.92 834.86 Sat Apr 30 16:05:04 2005 700 44052.77 78 62.9325 92.48 971.53 Sat Apr 30 16:06:37 2005 800 41066.89 79 51.3336 113.38 1111.15 Sat Apr 30 16:08:31 2005 900 38918.77 79 43.2431 134.59 1252.57 Sat Apr 30 16:10:46 2005 1000 41842.21 76 41.8422 139.09 1392.33 Sat Apr 30 16:13:05 2005 These are measurement taken directly after boot and show a greater improvement than 5%. However, the performance improvements become less over time if the AIM7 runs are repeated and settle down at around 5%. Links to earlier discussions: http://marc.theaimsgroup.com/?t=111094594500003&r=1&w=2 http://marc.theaimsgroup.com/?t=111603406600002&r=1&w=2 Changelog V4-V5: - alloc_arraycache and alloc_aliencache take node parameter instead of cpu - fix initialization so that nodes without cpus are properly handled. - simplify code in kmem_cache_init - patch against Andrews temp mm3 release - Add Shai to credits - fallback to __cache_alloc from __cache_alloc_node if the node's cache is not available yet. Changelog V3-V4: - Patch against 2.6.12-rc5-mm1 - Cleanup patch integrated - More and better use of for_each_node and for_each_cpu - GCC 2.95 fix (do not use [] use [0]) - Correct determination of INDEX_AC - Remove hack to cause an error on platforms that have no CONFIG_NUMA but nodes. - Remove list3_data and list3_data_ptr macros for better readability Changelog V2-V3: - Made to patch against 2.6.12-rc4-mm1 - Revised bootstrap mechanism so that larger size kmem_list3 structs can be supported. Do a generic solution so that the right slab can be found for the internal structs. - use for_each_online_node Changelog V1-V2: - Batching for freeing of wrong-node objects (alien caches) - Locking changes and NUMA #ifdefs as requested by Manfred Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Shobhit Dayal <shobhit@calsoftinc.com> Signed-off-by: Shai Fultheim <Shai@Scalex86.org> Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] tmpfs: Enable atomic inode security labelingStephen Smalley2005-09-091-1/+19
| | | | | | | | | | | | | | | | | | | | | This patch modifies tmpfs to call the inode_init_security LSM hook to set up the incore inode security state for new inodes before the inode becomes accessible via the dcache. As there is no underlying storage of security xattrs in this case, it is not necessary for the hook to return the (name, value, len) triple to the tmpfs code, so this patch also modifies the SELinux hook function to correctly handle the case where the (name, value, len) pointers are NULL. The hook call is needed in tmpfs in order to support proper security labeling of tmpfs inodes (e.g. for udev with tmpfs /dev in Fedora). With this change in place, we should then be able to remove the security_inode_post_create/mkdir/... hooks safely. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] update filesystems for new delete_inode behaviorMark Fasheh2005-09-091-0/+1
| | | | | | | | | | | | | | Update the file systems in fs/ implementing a delete_inode() callback to call truncate_inode_pages(). One implementation note: In developing this patch I put the calls to truncate_inode_pages() at the very top of those filesystems delete_inode() callbacks in order to retain the previous behavior. I'm guessing that some of those could probably be optimized. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] PCI: Run PCI driver initialization on local nodeAndi Kleen2005-09-081-1/+1
| | | | | | | | | | | | | | | Run PCI driver initialization on local node Instead of adding messy kmalloc_node()s everywhere run the PCI driver probe on the node local to the device. This would not have helped for IDE, but should for other more clean drivers that do more initialization in probe(). It won't help for drivers that do most of the work on first open (like many network drivers) Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] introduce and use kzallocPekka J Enberg2005-09-071-12/+6
| | | | | | | | | | This patch introduces a kzalloc wrapper and converts kernel/ to use it. It saves a little program text. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] cpusets: confine oom_killer to mem_exclusive cpusetPaul Jackson2005-09-071-0/+5
| | | | | | | | | | | | | | | | | | | | | Now the real motivation for this cpuset mem_exclusive patch series seems trivial. This patch keeps a task in or under one mem_exclusive cpuset from provoking an oom kill of a task under a non-overlapping mem_exclusive cpuset. Since only interrupt and GFP_ATOMIC allocations are allowed to escape mem_exclusive containment, there is little to gain from oom killing a task under a non-overlapping mem_exclusive cpuset, as almost all kernel and user memory allocation must come from disjoint memory nodes. This patch enables configuring a system so that a runaway job under one mem_exclusive cpuset cannot cause the killing of a job in another such cpuset that might be using very high compute and memory resources for a prolonged time. Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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