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2013-07-15Merge branch 'slab/for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux Pull slab update from Pekka Enberg: "Highlights: - Fix for boot-time problems on some architectures due to init_lock_keys() not respecting kmalloc_caches boundaries (Christoph Lameter) - CONFIG_SLUB_CPU_PARTIAL requested by RT folks (Joonsoo Kim) - Fix for excessive slab freelist draining (Wanpeng Li) - SLUB and SLOB cleanups and fixes (various people)" I ended up editing the branch, and this avoids two commits at the end that were immediately reverted, and I instead just applied the oneliner fix in between myself. * 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux slub: Check for page NULL before doing the node_match check mm/slab: Give s_next and s_stop slab-specific names slob: Check for NULL pointer before calling ctor() slub: Make cpu partial slab support configurable slab: add kmalloc() to kernel API documentation slab: fix init_lock_keys slob: use DIV_ROUND_UP where possible slub: do not put a slab to cpu partial list when cpu_partial is 0 mm/slub: Use node_nr_slabs and node_nr_objs in get_slabinfo mm/slub: Drop unnecessary nr_partials mm/slab: Fix /proc/slabinfo unwriteable for slab mm/slab: Sharing s_next and s_stop between slab and slub mm/slab: Fix drain freelist excessively slob: Rework #ifdeffery in slab.h mm, slab: moved kmem_cache_alloc_node comment to correct place
2013-07-07slob: Check for NULL pointer before calling ctor()Steven Rostedt1-1/+1
While doing some code inspection, I noticed that the slob constructor method can be called with a NULL pointer. If memory is tight and slob fails to allocate with slob_alloc() or slob_new_pages() it still calls the ctor() method with a NULL pointer. Looking at the first ctor() method I found, I noticed that it can not handle a NULL pointer (I'm sure others probably can't either): static void sighand_ctor(void *data) { struct sighand_struct *sighand = data; spin_lock_init(&sighand->siglock); init_waitqueue_head(&sighand->signalfd_wqh); } The solution is to only call the ctor() method if allocation succeeded. Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2013-07-07slob: use DIV_ROUND_UP where possibleSasha Levin1-1/+1
Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2013-02-24mm: rename page struct field helpersMel Gorman1-1/+1
The function names page_xchg_last_nid(), page_last_nid() and reset_page_last_nid() were judged to be inconsistent so rename them to a struct_field_op style pattern. As it looked jarring to have reset_page_mapcount() and page_nid_reset_last() beside each other in memmap_init_zone(), this patch also renames reset_page_mapcount() to page_mapcount_reset(). There are others like init_page_count() but as it is used throughout the arch code a rename would likely cause more conflicts than it is worth. [akpm@linux-foundation.org: fix zcache] Signed-off-by: Mel Gorman <mgorman@suse.de> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-19sl[au]b: always get the cache from its page in kmem_cache_free()Glauber Costa1-1/+1
struct page already has this information. If we start chaining caches, this information will always be more trustworthy than whatever is passed into the function. Signed-off-by: Glauber Costa <glommer@parallels.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: JoonSoo Kim <js1304@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Michal Hocko <mhocko@suse.cz> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Rik van Riel <riel@redhat.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-11mm/sl[aou]b: Common alignment codeChristoph Lameter1-10/+0
Extract the code to do object alignment from the allocators. Do the alignment calculations in slab_common so that the __kmem_cache_create functions of the allocators do not have to deal with alignment. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-31mm/slob: use min_t() to compare ARCH_SLAB_MINALIGNArnd Bergmann1-3/+3
The definition of ARCH_SLAB_MINALIGN is architecture dependent and can be either of type size_t or int. Comparing that value with ARCH_KMALLOC_MINALIGN can cause harmless warnings on platforms where they are different. Since both are always small positive integer numbers, using the size_t type to compare them is safe and gets rid of the warning. Without this patch, building ARM collie_defconfig results in: mm/slob.c: In function '__kmalloc_node': mm/slob.c:431:152: warning: comparison of distinct pointer types lacks a cast [enabled by default] mm/slob.c: In function 'kfree': mm/slob.c:484:153: warning: comparison of distinct pointer types lacks a cast [enabled by default] mm/slob.c: In function 'ksize': mm/slob.c:503:153: warning: comparison of distinct pointer types lacks a cast [enabled by default] Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> [ penberg@kernel.org: updates for master ] Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-31mm/slob: Use free_page instead of put_page for page-size kmalloc allocationsEzequiel Garcia1-1/+1
When freeing objects, the slob allocator currently free empty pages calling __free_pages(). However, page-size kmallocs are disposed using put_page() instead. It makes no sense to call put_page() for kernel pages that are provided by the object allocator, so we shouldn't be doing this ourselves. This is based on: commit d9b7f22623b5fa9cc189581dcdfb2ac605933bf4 Author: Glauber Costa <glommer@parallels.com> slub: use free_page instead of put_page for freeing kmalloc allocation Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Acked-by: Glauber Costa <glommer@parallels.com> Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-31mm/sl[aou]b: Move common kmem_cache_size() to slab.hEzequiel Garcia1-6/+0
This function is identically defined in all three allocators and it's trivial to move it to slab.h Since now it's static, inline, header-defined function this patch also drops the EXPORT_SYMBOL tag. Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-31mm/slob: Use object_size field in kmem_cache_size()Ezequiel Garcia1-3/+3
Fields object_size and size are not the same: the latter might include slab metadata. Return object_size field in kmem_cache_size(). Also, improve trace accuracy by correctly tracing reported size. Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Acked-by: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-31mm/slob: Drop usage of page->private for storing page-sized allocationsEzequiel Garcia1-14/+10
This field was being used to store size allocation so it could be retrieved by ksize(). However, it is a bad practice to not mark a page as a slab page and then use fields for special purposes. There is no need to store the allocated size and ksize() can simply return PAGE_SIZE << compound_order(page). Cc: Pekka Enberg <penberg@kernel.org> Cc: Matt Mackall <mpm@selenic.com> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-10-03Merge branch 'slab/tracing' into slab/for-linusPekka Enberg1-1/+1
2012-10-03Merge branch 'slab/common-for-cgroups' into slab/for-linusPekka Enberg1-33/+27
Fix up a trivial conflict with NUMA_NO_NODE cleanups. Conflicts: mm/slob.c Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-26mm, slob: fix build breakage in __kmalloc_node_track_callerDavid Rientjes1-1/+1
On Sat, 8 Sep 2012, Ezequiel Garcia wrote: > @@ -454,15 +455,35 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node) > gfp |= __GFP_COMP; > ret = slob_new_pages(gfp, order, node); > > - trace_kmalloc_node(_RET_IP_, ret, > + trace_kmalloc_node(caller, ret, > size, PAGE_SIZE << order, gfp, node); > } > > kmemleak_alloc(ret, size, 1, gfp); > return ret; > } > + > +void *__kmalloc_node(size_t size, gfp_t gfp, int node) > +{ > + return __do_kmalloc_node(size, gfp, node, _RET_IP_); > +} > EXPORT_SYMBOL(__kmalloc_node); > > +#ifdef CONFIG_TRACING > +void *__kmalloc_track_caller(size_t size, gfp_t gfp, unsigned long caller) > +{ > + return __do_kmalloc_node(size, gfp, NUMA_NO_NODE, caller); > +} > + > +#ifdef CONFIG_NUMA > +void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags, > + int node, unsigned long caller) > +{ > + return __do_kmalloc_node(size, gfp, node, caller); > +} > +#endif This breaks Pekka's slab/next tree with this: mm/slob.c: In function '__kmalloc_node_track_caller': mm/slob.c:488: error: 'gfp' undeclared (first use in this function) mm/slob.c:488: error: (Each undeclared identifier is reported only once mm/slob.c:488: error: for each function it appears in.) mm, slob: fix build breakage in __kmalloc_node_track_caller "mm, slob: Add support for kmalloc_track_caller()" breaks the build because gfp is undeclared. Fix it. Acked-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-25mm, slob: Add support for kmalloc_track_caller()Ezequiel Garcia1-3/+24
Currently slob falls back to regular kmalloc for this case. With this patch kmalloc_track_caller() is correctly implemented, thus tracing the specified caller. This is important to trace accurately allocations performed by krealloc, kstrdup, kmemdup, etc. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-25mm, slob: Use NUMA_NO_NODE instead of -1Ezequiel Garcia1-3/+3
Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Move kmem_cache refcounting to common codeChristoph Lameter1-1/+0
Get rid of the refcount stuff in the allocators and do that part of kmem_cache management in the common code. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Shrink __kmem_cache_create() parameter listsChristoph Lameter1-5/+3
Do the initial settings of the fields in common code. This will allow us to push more processing into common code later and improve readability. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Move kmem_cache allocations into common codeChristoph Lameter1-25/+17
Shift the allocations to common code. That way the allocation and freeing of the kmem_cache structures is handled by common code. Reviewed-by: Glauber Costa <glommer@parallels.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Get rid of __kmem_cache_destroyChristoph Lameter1-4/+0
What is done there can be done in __kmem_cache_shutdown. This affects RCU handling somewhat. On rcu free all slab allocators do not refer to other management structures than the kmem_cache structure. Therefore these other structures can be freed before the rcu deferred free to the page allocator occurs. Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Move freeing of kmem_cache structure to common codeChristoph Lameter1-2/+0
The freeing action is basically the same in all slab allocators. Move to the common kmem_cache_destroy() function. Reviewed-by: Glauber Costa <glommer@parallels.com> Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Use "kmem_cache" name for slab cache with kmem_cache structChristoph Lameter1-0/+8
Make all allocators use the "kmem_cache" slabname for the "kmem_cache" structure. Reviewed-by: Glauber Costa <glommer@parallels.com> Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Extract a common function for kmem_cache_destroyChristoph Lameter1-8/+7
kmem_cache_destroy does basically the same in all allocators. Extract common code which is easy since we already have common mutex handling. Reviewed-by: Glauber Costa <glommer@parallels.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-09-05mm/sl[aou]b: Move list_add() to slab_common.cChristoph Lameter1-0/+4
Move the code to append the new kmem_cache to the list of slab caches to the kmem_cache_create code in the shared code. This is possible now since the acquisition of the mutex was moved into kmem_cache_create(). Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Glauber Costa <glommer@parallels.com> Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-07-12slob: Fix early boot kernel crashChristoph Lameter1-1/+1
Commit fd3142a59af2012a7c5dc72ec97a4935ff1c5fc6 broke slob since a piece of a change for a later patch slipped into it. Fengguang Wu writes: The commit crashes the kernel w/o any dmesg output (the attached one is created by the script as a summary for that run). This is very reproducible in kvm for the attached config. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-07-09mm, sl[aou]b: Common definition for boot state of the slab allocatorsChristoph Lameter1-9/+5
All allocators have some sort of support for the bootstrap status. Setup a common definition for the boot states and make all slab allocators use that definition. Reviewed-by: Glauber Costa <glommer@parallels.com> Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-07-09mm, sl[aou]b: Extract common code for kmem_cache_create()Christoph Lameter1-5/+3
Kmem_cache_create() does a variety of sanity checks but those vary depending on the allocator. Use the strictest tests and put them into a slab_common file. Make the tests conditional on CONFIG_DEBUG_VM. This patch has the effect of adding sanity checks for SLUB and SLOB under CONFIG_DEBUG_VM and removes the checks in SLAB for !CONFIG_DEBUG_VM. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-06-14mm, sl[aou]b: Extract common fields from struct kmem_cacheChristoph Lameter1-8/+1
Define a struct that describes common fields used in all slab allocators. A slab allocator either uses the common definition (like SLOB) or is required to provide members of kmem_cache with the definition given. After that it will be possible to share code that only operates on those fields of kmem_cache. The patch basically takes the slob definition of kmem cache and uses the field namees for the other allocators. It also standardizes the names used for basic object lengths in allocators: object_size Struct size specified at kmem_cache_create. Basically the payload expected to be used by the subsystem. size The size of memory allocator for each object. This size is larger than object_size and includes padding, alignment and extra metadata for each object (f.e. for debugging and rcu). Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-06-14slob: Remove various small accessorsChristoph Lameter1-40/+9
Those have become so simple that they are no longer needed. Reviewed-by: Joonsoo Kim <js1304@gmail.com> Acked-by: David Rientjes <rientjes@google.com> signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-06-14slob: No need to zero mapping since it is no longer in useChristoph Lameter1-1/+0
Reviewed-by: Joonsoo Kim <js1304@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2012-06-14slob: Define page struct fields used in mm_types.hChristoph Lameter1-58/+37
Define the fields used by slob in mm_types.h and use struct page instead of struct slob_page in slob. This cleans up numerous of typecasts in slob.c and makes readers aware of slob's use of page struct fields. [Also cleans up some bitrot in slob.c. The page struct field layout in slob.c is an old layout and does not match the one in mm_types.h] Reviewed-by: Glauber Costa <glommer@parallels.com> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Joonsoo Kim <js1304@gmail.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2011-10-31mm: Map most files to use export.h instead of module.hPaul Gortmaker1-1/+1
The files changed within are only using the EXPORT_SYMBOL macro variants. They are not using core modular infrastructure and hence don't need module.h but only the export.h header. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-07-27atomic: use <linux/atomic.h>Arun Sharma1-1/+1
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-07slob/lockdep: Fix gfp flags passed to lockdepSteven Rostedt1-0/+6
Doing a ktest.pl randconfig, I stumbled across the following bug on boot up: ------------[ cut here ]------------ WARNING: at /home/rostedt/work/autotest/nobackup/linux-test.git/kernel/lockdep.c:2649 lockdep_trace_alloc+0xed/0x100() Hardware name: Modules linked in: Pid: 0, comm: swapper Not tainted 3.0.0-rc1-test-00054-g1d68b67 #1 Call Trace: [<ffffffff810626ad>] warn_slowpath_common+0xad/0xf0 [<ffffffff8106270a>] warn_slowpath_null+0x1a/0x20 [<ffffffff810b537d>] lockdep_trace_alloc+0xed/0x100 [<ffffffff81182fb0>] __kmalloc_node+0x30/0x2f0 [<ffffffff81153eda>] pcpu_mem_alloc+0x13a/0x180 [<ffffffff82be022c>] percpu_init_late+0x48/0xc2 [<ffffffff82bd630c>] ? mem_init+0xd8/0xe3 [<ffffffff82bbcc73>] start_kernel+0x1c2/0x449 [<ffffffff82bbc35c>] x86_64_start_reservations+0x163/0x167 [<ffffffff82bbc493>] x86_64_start_kernel+0x133/0x142^M ---[ end trace a7919e7f17c0a725 ]--- Then I ran a ktest.pl config_bisect and it came up with this config as the problem: CONFIG_SLOB Looking at what is different between SLOB and SLAB and SLUB, I found that the gfp flags are masked against gfp_allowed_mask in SLAB and SLUB, but not SLOB. On boot up, interrupts are disabled and lockdep will warn if some flags are set in gfp and interrupts are disabled. But these flags are masked off with the gfp_allowed_mask during boot. Because SLOB does not mask the flags against gfp_allowed_mask it triggers the warn on. Adding this mask fixes the bug. I also found that kmem_cache_alloc_node() was missing both the mask and the lockdep check, and that was added too. Acked-by: Matt Mackall <mpm@selenic.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Nick Piggin <npiggin@kernel.dk> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2011-01-23mm: Remove support for kmem_cache_name()Christoph Lameter1-6/+0
The last user was ext4 and Eric Sandeen removed the call in a recent patch. See the following URL for the discussion: http://marc.info/?l=linux-ext4&m=129546975702198&w=2 Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2011-01-07kernel: kmem_ptr_validate considered harmfulNick Piggin1-5/+0
This is a nasty and error prone API. It is no longer used, remove it. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2010-10-02slob: fix gfp flags for order-0 page allocationsDavid Rientjes1-1/+3
kmalloc_node() may allocate higher order slob pages, but the __GFP_COMP bit is only passed to the page allocator and not represented in the tracepoint event. The bit should be passed to trace_kmalloc_node() as well. Acked-by: Matt Mackall <mpm@selenic.com> Reviewed-by: Christoph Lameter <cl@linux.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
2010-08-06Merge branch 'for-linus' of ↵Linus Torvalds1-1/+8
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: slub: Allow removal of slab caches during boot Revert "slub: Allow removal of slab caches during boot" slub numa: Fix rare allocation from unexpected node slab: use deferable timers for its periodic housekeeping slub: Use kmem_cache flags to detect if slab is in debugging mode. slub: Allow removal of slab caches during boot slub: Check kasprintf results in kmem_cache_init() SLUB: Constants need UL slub: Use a constant for a unspecified node. SLOB: Free objects to their own list slab: fix caller tracking on !CONFIG_DEBUG_SLAB && CONFIG_TRACING
2010-08-06Merge branch 'perf-core-for-linus' of ↵Linus Torvalds1-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (162 commits) tracing/kprobes: unregister_trace_probe needs to be called under mutex perf: expose event__process function perf events: Fix mmap offset determination perf, powerpc: fsl_emb: Restore setting perf_sample_data.period perf, powerpc: Convert the FSL driver to use local64_t perf tools: Don't keep unreferenced maps when unmaps are detected perf session: Invalidate last_match when removing threads from rb_tree perf session: Free the ref_reloc_sym memory at the right place x86,mmiotrace: Add support for tracing STOS instruction perf, sched migration: Librarize task states and event headers helpers perf, sched migration: Librarize the GUI class perf, sched migration: Make the GUI class client agnostic perf, sched migration: Make it vertically scrollable perf, sched migration: Parameterize cpu height and spacing perf, sched migration: Fix key bindings perf, sched migration: Ignore unhandled task states perf, sched migration: Handle ignored migrate out events perf: New migration tool overview tracing: Drop cpparg() macro perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call ... Fix up trivial conflicts in Makefile and drivers/cpufreq/cpufreq.c
2010-07-16SLOB: Free objects to their own listBob Liu1-1/+8
SLOB has alloced smaller objects from their own list in reduce overall external fragmentation and increase repeatability, free to their own list also. This is /proc/meminfo result in my test machine: without this patch: === MemTotal: 1030720 kB MemFree: 750012 kB Buffers: 15496 kB Cached: 160396 kB SwapCached: 0 kB Active: 105024 kB Inactive: 145604 kB Active(anon): 74816 kB Inactive(anon): 2180 kB Active(file): 30208 kB Inactive(file): 143424 kB Unevictable: 16 kB .... with this patch: === MemTotal: 1030720 kB MemFree: 751908 kB Buffers: 15492 kB Cached: 160280 kB SwapCached: 0 kB Active: 102720 kB Inactive: 146140 kB Active(anon): 73168 kB Inactive(anon): 2180 kB Active(file): 29552 kB Inactive(file): 143960 kB Unevictable: 16 kB ... The result shows an improvement of 1 MB! And when I tested it on a embeded system with 64 MB, I found this path is never called during kernel bootup. Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2010-06-15mm: remove all rcu head initializationsPaul E. McKenney1-1/+0
Remove all rcu head inits. We don't care about the RCU head state before passing it to call_rcu() anyway. Only leave the "on_stack" variants so debugobjects can keep track of objects on stack. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Matt Mackall <mpm@selenic.com> Cc: Andrew Morton <akpm@linux-foundation.org>
2010-06-09tracing: Remove kmemtrace ftrace pluginLi Zefan1-1/+3
We have been resisting new ftrace plugins and removing existing ones, and kmemtrace has been superseded by kmem trace events and perf-kmem, so we remove it. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> [ remove kmemtrace from the makefile, handle slob too ] Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-05-19mm: Move ARCH_SLAB_MINALIGN and ARCH_KMALLOC_MINALIGN to <linux/slob_def.h>David Woodhouse1-8/+0
Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-08-06slab: remove duplicate kmem_cache_init_late() declarationsWu Fengguang1-0/+5
kmem_cache_init_late() has been declared in slab.h CC: Nick Piggin <npiggin@suse.de> CC: Matt Mackall <mpm@selenic.com> CC: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-26fix RCU-callback-after-kmem_cache_destroy problem in sl[aou]bPaul E. McKenney1-0/+2
Jesper noted that kmem_cache_destroy() invokes synchronize_rcu() rather than rcu_barrier() in the SLAB_DESTROY_BY_RCU case, which could result in RCU callbacks accessing a kmem_cache after it had been destroyed. Cc: <stable@kernel.org> Acked-by: Matt Mackall <mpm@selenic.com> Reported-by: Jesper Dangaard Brouer <hawk@comx.dk> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-17Merge branches 'slab/documentation', 'slab/fixes', 'slob/cleanups' and ↵Pekka Enberg1-3/+3
'slub/fixes' into for-linus
2009-06-17page allocator: do not check NUMA node ID when the caller knows the node is ↵Mel Gorman1-2/+2
valid Callers of alloc_pages_node() can optionally specify -1 as a node to mean "allocate from the current node". However, a number of the callers in fast paths know for a fact their node is valid. To avoid a comparison and branch, this patch adds alloc_pages_exact_node() that only checks the nid with VM_BUG_ON(). Callers that know their node is valid are then converted. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Paul Mundt <lethal@linux-sh.org> [for the SLOB NUMA bits] Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11kmemleak: Add the slob memory allocation/freeing hooksCatalin Marinas1-0/+7
This patch adds the callbacks to kmemleak_(alloc|free) functions from the slob allocator. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Matt Mackall <mpm@selenic.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-11Merge branch 'tracing-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (244 commits) Revert "x86, bts: reenable ptrace branch trace support" tracing: do not translate event helper macros in print format ftrace/documentation: fix typo in function grapher name tracing/events: convert block trace points to TRACE_EVENT(), fix !CONFIG_BLOCK tracing: add protection around module events unload tracing: add trace_seq_vprint interface tracing: fix the block trace points print size tracing/events: convert block trace points to TRACE_EVENT() ring-buffer: fix ret in rb_add_time_stamp ring-buffer: pass in lockdep class key for reader_lock tracing: add annotation to what type of stack trace is recorded tracing: fix multiple use of __print_flags and __print_symbolic tracing/events: fix output format of user stack tracing/events: fix output format of kernel stack tracing/trace_stack: fix the number of entries in the header ring-buffer: discard timestamps that are at the start of the buffer ring-buffer: try to discard unneeded timestamps ring-buffer: fix bug in ring_buffer_discard_commit ftrace: do not profile functions when disabled tracing: make trace pipe recognize latency format flag ...
2009-05-11slob: use PG_slab for identifying SLOB pagesWu Fengguang1-3/+3
For the sake of consistency. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Andi Kleen <andi@firstfloor.org> Acked-by: Matt Mackall <mpm@selenic.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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