Joonsoo Kim d31676dfde mm/slab: alternative implementation for DEBUG_SLAB_LEAK ... DEBUG_SLAB_LEAK is a debug option. It's current implementation requires status buffer so we need more memory to use it. And, it cause kmem_cache initialization step more complex. To remove this extra memory usage and to simplify initialization step, this patch implement this feature with another way. When user requests to get slab object owner information, it marks that getting information is started. And then, all free objects in caches are flushed to corresponding slab page. Now, we can distinguish all freed object so we can know all allocated objects, too. After collecting slab object owner information on allocated objects, mark is checked that there is no free during the processing. If true, we can be sure that our information is correct so information is returned to user. Although this way is rather complex, it has two important benefits mentioned above. So, I think it is worth changing. There is one drawback that it takes more time to get slab object owner information but it is just a debug option so it doesn't matter at all. To help review, this patch implements new way only. Following patch will remove useless code. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-03-15 16:55:16 -07:00
..
kasan	kasan: add functions to clear stack poison	2016-03-09 15:43:42 -08:00
backing-dev.c	mm/backing-dev.c: fix error path in wb_init()	2016-02-11 18:35:48 -08:00
balloon_compaction.c	virtio_balloon: fix race between migration and ballooning	2016-01-12 20:47:06 +02:00
bootmem.c	x86/mm: Introduce max_possible_pfn	2015-12-06 12:46:31 +01:00
cleancache.c	cleancache: constify cleancache_ops structure	2016-01-27 09:09:57 -05:00
cma_debug.c	mm/cma_debug: correct size input to bitmap function	2015-07-17 16:39:54 -07:00
cma.c	mm/cma.c: suppress warning	2015-11-05 19:34:48 -08:00
cma.h	mm: cma: mark cma_bitmap_maxno() inline in header	2015-08-14 15:56:32 -07:00
compaction.c	mm/compaction.c: __compact_pgdat() code cleanuup	2016-01-14 16:00:49 -08:00
debug-pagealloc.c	mm/debug-pagealloc: make debug-pagealloc boottime configurable	2014-12-13 12:42:48 -08:00
debug.c	mm: rework mapcount accounting to enable 4k mapping of THPs	2016-01-15 17:56:32 -08:00
dmapool.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
early_ioremap.c	mm/early_ioremap: use offset_in_page macro	2015-11-05 19:34:48 -08:00
fadvise.c	writeback: implement and use inode_congested()	2015-06-02 08:33:35 -06:00
failslab.c	mm: fault-inject take over bootstrap kmem_cache check	2016-03-15 16:55:16 -07:00
filemap.c	mm: __delete_from_page_cache show Bad page if mapped	2016-03-09 15:43:42 -08:00
frame_vector.c	mm: fix docbook comment for get_vaddr_frames()	2015-11-05 19:34:48 -08:00
frontswap.c	frontswap: allow multiple backends	2015-06-24 17:49:45 -07:00
gup.c	mm: retire GUP WARN_ON_ONCE that outlived its usefulness	2016-02-03 08:57:14 -08:00
highmem.c	mm/highmem: make kmap cache coloring aware	2014-08-06 18:01:22 -07:00
huge_memory.c	thp: call pmdp_invalidate() with correct virtual address	2016-02-24 10:46:30 -08:00
hugetlb_cgroup.c	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
hugetlb.c	mm/hugetlb: use EOPNOTSUPP in hugetlb sysctl handlers	2016-03-09 15:43:42 -08:00
hwpoison-inject.c	hwpoison: use page_cgroup_ino for filtering by memcg	2015-09-10 13:29:01 -07:00
init-mm.c
internal.h	mm: polish virtual memory accounting	2016-02-03 08:28:43 -08:00
interval_tree.c	mm: replace vma->sharead.linear with vma->shared	2015-02-10 14:30:31 -08:00
Kconfig	mm/Kconfig: correct description of DEFERRED_STRUCT_PAGE_INIT	2016-02-05 18:10:40 -08:00
Kconfig.debug	mm/debug_pagealloc: remove obsolete Kconfig options	2015-01-08 15:10:52 -08:00
kmemcheck.c	mm: kmemcheck skip object if slab allocation failed	2016-03-15 16:55:16 -07:00
kmemleak-test.c	mm/kmemleak-test.c: use pr_fmt for logging	2014-06-06 16:08:18 -07:00
kmemleak.c	Revert "gfp: add __GFP_NOACCOUNT"	2016-01-14 16:00:49 -08:00
ksm.c	mm/ksm.c: mark stable page dirty	2016-01-15 17:56:32 -08:00
list_lru.c	mm: memcontrol: move kmem accounting code to CONFIG_MEMCG	2016-01-20 17:09:18 -08:00
maccess.c	mm/maccess.c: actually return -EFAULT from strncpy_from_unsafe	2015-11-05 19:34:48 -08:00
madvise.c	mm/huge_memory.c: don't split THP page when MADV_FREE syscall is called	2016-01-15 17:56:32 -08:00
Makefile	media updates for v4.3-rc1	2015-09-11 16:42:39 -07:00
memblock.c	memblock: don't mark memblock_phys_mem_size() as __init	2016-02-05 18:10:40 -08:00
memcontrol.c	thp: change pmd_trans_huge_lock() interface to return ptl	2016-01-21 17:20:51 -08:00
memory_hotplug.c	xen, mm: Set IORESOURCE_SYSTEM_RAM to System RAM	2016-01-30 09:49:58 +01:00
memory-failure.c	mm: soft-offline: exit with failure for non anonymous thp	2016-01-15 17:56:32 -08:00
memory.c	mm: thp: fix SMP race condition between THP page fault and MADV_DONTNEED	2016-02-27 10:28:52 -08:00
mempolicy.c	mm, thp: fix migration of PTE-mapped transparent huge pages	2016-03-09 15:43:42 -08:00
mempool.c	mm/mempool: avoid KASAN marking mempool poison checks as use-after-free	2016-03-11 16:17:47 -08:00
memtest.c	memtest: remove unused header files	2015-09-08 15:35:28 -07:00
migrate.c	mm: numa: quickly fail allocations for NUMA balancing on full nodes	2016-02-27 10:28:52 -08:00
mincore.c	thp: change pmd_trans_huge_lock() interface to return ptl	2016-01-21 17:20:51 -08:00
mlock.c	mm: fix mlock accouting	2016-01-21 17:20:51 -08:00
mm_init.c	mm: meminit: remove mminit_verify_page_links	2015-06-30 19:44:56 -07:00
mmap.c	mm: fix regression in remap_file_pages() emulation	2016-02-18 16:23:24 -08:00
mmu_context.c	sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm	2014-02-21 08:50:17 +01:00
mmu_notifier.c	mmu-notifier: add clear_young callback	2015-09-10 13:29:01 -07:00
mmzone.c	mm/mmzone.c: memmap_valid_within() can be boolean	2016-01-14 16:00:49 -08:00
mprotect.c	mm, dax: check for pmd_none() after split_huge_pmd()	2016-02-11 18:35:48 -08:00
mremap.c	mm, dax: check for pmd_none() after split_huge_pmd()	2016-02-11 18:35:48 -08:00
msync.c	mm/msync: use offset_in_page macro	2015-11-05 19:34:48 -08:00
nobootmem.c	x86/mm: Introduce max_possible_pfn	2015-12-06 12:46:31 +01:00
nommu.c	kmemcg: account certain kmem allocations to memcg	2016-01-14 16:00:49 -08:00
oom_kill.c	mm, shmem: add internal shmem resident memory accounting	2016-01-14 16:00:49 -08:00
page_alloc.c	mm, hugetlb: don't require CMA for runtime gigantic pages	2016-02-05 18:10:40 -08:00
page_counter.c	mm: page_counter: let page_counter_try_charge() return bool	2015-11-05 19:34:48 -08:00
page_ext.c	mm: introduce idle page tracking	2015-09-10 13:29:01 -07:00
page_idle.c	mm: add page_check_address_transhuge() helper	2016-01-15 17:56:32 -08:00
page_io.c	fs: use helper bio_add_page() instead of open coding on bi_io_vec	2015-08-13 12:32:00 -06:00
page_isolation.c	mm/page_isolation: do some cleanup in "undo_isolate_page_range"	2016-01-15 17:56:32 -08:00
page_owner.c	mm/page_owner: set correct gfp_mask on page_owner	2015-07-17 16:39:54 -07:00
page-writeback.c	mm: page_alloc: generalize the dirty balance reserve	2016-01-14 16:00:49 -08:00
pagewalk.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
percpu-km.c	percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated	2014-09-02 14:46:05 -04:00
percpu-vm.c	percpu: move region iterations out of pcpu_[de]populate_chunk()	2014-09-02 14:46:02 -04:00
percpu.c	tree wide: use kvfree() than conditional kfree()/vfree()	2016-01-22 17:02:18 -08:00
pgtable-generic.c	mm,thp: fix spellos in describing __HAVE_ARCH_FLUSH_PMD_TLB_RANGE	2016-02-11 18:35:48 -08:00
process_vm_access.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-01-20 17:09:18 -08:00
quicklist.c
readahead.c	mm: move lru_to_page to mm_inline.h	2016-01-14 16:00:49 -08:00
rmap.c	mm: fix locking order in mm_take_all_locks()	2016-01-15 17:56:32 -08:00
shmem.c	make sure that freeing shmem fast symlinks is RCU-delayed	2016-01-22 18:08:52 -05:00
slab_common.c	mm: new API kfree_bulk() for SLAB+SLUB allocators	2016-03-15 16:55:16 -07:00
slab.c	mm/slab: alternative implementation for DEBUG_SLAB_LEAK	2016-03-15 16:55:16 -07:00
slab.h	mm: fix some spelling	2016-03-15 16:55:16 -07:00
slob.c	mm: slab: free kmem_cache_node after destroy sysfs file	2016-02-18 16:23:24 -08:00
slub.c	mm: new API kfree_bulk() for SLAB+SLUB allocators	2016-03-15 16:55:16 -07:00
sparse-vmemmap.c	x86, mm: introduce vmem_altmap to augment vmemmap_populate()	2016-01-15 17:56:32 -08:00
sparse.c	x86, mm: introduce vmem_altmap to augment vmemmap_populate()	2016-01-15 17:56:32 -08:00
swap_cgroup.c	mm: page_cgroup: rename file to mm/swap_cgroup.c	2014-12-10 17:41:09 -08:00
swap_state.c	mm: memcontrol: charge swap to cgroup2	2016-01-20 17:09:18 -08:00
swap.c	mm, x86: get_user_pages() for dax mappings	2016-01-15 17:56:32 -08:00
swapfile.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
truncate.c	dax: support dirty DAX entries in radix tree	2016-01-22 17:02:18 -08:00
userfaultfd.c	memcg: adjust to support new THP refcounting	2016-01-15 17:56:32 -08:00
util.c	proc: revert /proc/<pid>/maps [stack:TID] annotation	2016-02-03 08:28:43 -08:00
vmacache.c	mm/vmacache: inline vmacache_valid_mm()	2015-11-05 19:34:48 -08:00
vmalloc.c	mm/vmalloc.c: use macro IS_ALIGNED to judge the aligment	2016-01-15 17:56:32 -08:00
vmpressure.c	mm/vmpressure.c: fix subtree pressure detection	2016-02-03 08:28:43 -08:00
vmscan.c	mm: downgrade VM_BUG in isolate_lru_page() to warning	2016-02-05 18:10:40 -08:00
vmstat.c	vmstat: make vmstat_update deferrable	2016-02-05 18:10:40 -08:00
workingset.c	dax: support dirty DAX entries in radix tree	2016-01-22 17:02:18 -08:00
zbud.c	mm/zbud.c: use list_last_entry() instead of list_tail_entry()	2016-01-15 11:40:52 -08:00
zpool.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zsmalloc.c	zsmalloc: fix migrate_zspage-zs_free race condition	2016-01-20 17:09:18 -08:00
zswap.c	mm/zswap: change incorrect strncmp use to strcmp	2015-12-18 14:25:40 -08:00