Christoph Lameter 2ed3a4ef95 [PATCH] slab: do not panic when alloc_kmemlist fails and slab is up ...

It is fairly easy to get a system to oops by simply sizing a cache via
/proc in such a way that one of the chaches (shared is easiest) becomes
bigger than the maximum allowed slab allocation size.  This occurs because
enable_cpucache() fails if it cannot reallocate some caches.

However, enable_cpucache() is used for multiple purposes: resizing caches,
cache creation and bootstrap.

If the slab is already up then we already have working caches.  The resize
can fail without a problem.  We just need to return the proper error code.
F.e.  after this patch:

# echo "size-64 10000 50 1000" >/proc/slabinfo
-bash: echo: write error: Cannot allocate memory

notice no OOPS.

If we are doing a kmem_cache_create() then we also should not panic but
return -ENOMEM.

If on the other hand we do not have a fully bootstrapped slab allocator yet
then we should indeed panic since we are unable to bring up the slab to its
full functionality.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-09-26 08:48:50 -07:00

..

bootmem.c

[PATCH] bootmem: use MAX_DMA_ADDRESS instead of LOW32LIMIT

2006-09-26 08:48:49 -07:00

fadvise.c

[PATCH] fadvise() make POSIX_FADV_NOREUSE a no-op

2006-08-06 08:57:47 -07:00

filemap_xip.c

[PATCH] mark address_space_operations const

2006-06-28 14:59:04 -07:00

filemap.c

[PATCH] update some mm/ comments

2006-09-26 08:48:49 -07:00

filemap.h

[PATCH] generic_file_buffered_write(): handle zero-length iovec segments

2006-06-29 10:26:20 -07:00

fremap.c

[PATCH] mm: small cleanup of install_page()

2006-09-26 08:48:44 -07:00

highmem.c

[PATCH] reduce MAX_NR_ZONES: move HIGHMEM counters into highmem.c/.h

2006-09-26 08:48:46 -07:00

hugetlb.c

[PATCH] tightening hugetlb strict accounting

2006-06-23 07:42:48 -07:00

internal.h

[PATCH] mm: VM_BUG_ON

2006-09-26 08:48:44 -07:00

Kconfig

Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6

2006-06-29 10:49:17 -07:00

madvise.c

[PATCH] Fix MADV_REMOVE protection checking

2006-04-17 18:22:18 -07:00

Makefile

[PATCH] zoned vm counters: create vmstat.c/.h from page_alloc.c/.h

2006-06-30 11:25:34 -07:00

memory_hotplug.c

[PATCH] memory hotadd fixes: enhance collision check

2006-08-06 08:57:49 -07:00

memory.c

[PATCH] Add kerneldocs for some functions in mm/memory.c

2006-09-26 08:48:47 -07:00

mempolicy.c

[PATCH] linearly index zone->node_zonelists[]

2006-09-26 08:48:47 -07:00

mempool.c

[PATCH] dm: work around mempool_alloc, bio_alloc_bioset deadlocks

2006-09-01 11:39:09 -07:00

migrate.c

[PATCH] Allow migration of mlocked pages

2006-06-25 10:00:55 -07:00

mincore.c

[PATCH] freepgt: sys_mincore ignore FIRST_USER_PGD_NR

2005-04-19 13:29:20 -07:00

mlock.c

[PATCH] move capable() to capability.h

2006-01-11 18:42:13 -08:00

mmap.c

[PATCH] mm: tracking shared dirty pages

2006-09-26 08:48:44 -07:00

mmzone.c

[PATCH] mm/mmzone.c: EXPORT_UNUSED_SYMBOL

2006-07-10 13:24:17 -07:00

mprotect.c

[PATCH] mm: optimize the new mprotect() code a bit

2006-09-26 08:48:44 -07:00

mremap.c

[PATCH] lockdep: annotate mm

2006-07-03 15:27:07 -07:00

msync.c

[PATCH] mm: msync() cleanup

2006-09-26 08:48:45 -07:00

nommu.c

[PATCH] nommu: export two symbols for drivers to use

2006-07-14 21:53:53 -07:00

oom_kill.c

[PATCH] oom: more printk

2006-09-26 08:48:49 -07:00

page_alloc.c

[PATCH] linearly index zone->node_zonelists[]

2006-09-26 08:48:47 -07:00

page_io.c

[PATCH] mm: swap write failure fixup

2006-09-26 08:48:48 -07:00

page-writeback.c

[PATCH] mm: non syncing lock_page()

2006-09-26 08:48:48 -07:00

pdflush.c

[PATCH] pdflush: handle resume wakeups

2006-06-25 10:01:06 -07:00

prio_tree.c

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

readahead.c

spelling fixes

2006-06-26 18:35:02 +02:00

rmap.c

[PATCH] mm: tracking shared dirty pages

2006-09-26 08:48:44 -07:00

shmem.c

[PATCH] reduce MAX_NR_ZONES: move HIGHMEM counters into highmem.c/.h

2006-09-26 08:48:46 -07:00

slab.c

[PATCH] slab: do not panic when alloc_kmemlist fails and slab is up

2006-09-26 08:48:50 -07:00

slob.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

sparse.c

Remove obsolete #include <linux/config.h>

2006-06-30 19:25:36 +02:00

swap_state.c

[PATCH] lockdep: locking init debugging improvement

2006-07-03 15:27:02 -07:00

swap.c

[PATCH] mm/: make functions static

2006-09-26 08:48:45 -07:00

swapfile.c

[PATCH] swsusp: Fix swap_type_of

2006-08-27 11:01:28 -07:00

thrash.c

[PATCH] temporarily disable swap token on memory pressure

2005-11-28 14:42:25 -08:00

tiny-shmem.c

[PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree

2006-06-26 12:25:08 -07:00

truncate.c

[PATCH] invalidate_complete_page() race fix

2006-09-08 10:22:50 -07:00

util.c

[PATCH] slab: optimize constant-size kzalloc calls

2006-03-25 08:22:49 -08:00

vmalloc.c

[PATCH] mm/: make functions static

2006-09-26 08:48:45 -07:00

vmscan.c

[PATCH] oom: reclaim_mapped on oom

2006-09-26 08:48:48 -07:00

vmstat.c

[PATCH] reduce MAX_NR_ZONES: remove display of counters for unconfigured zones

2006-09-26 08:48:47 -07:00