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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-15 02:38:52 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-15 02:38:52 +0200 |
| commit | bb193c986a7104f718c1b92709e1e6e22ac3f864 (patch) | |
| tree | 1d5a1b08e31a8e39ec4688afd24695c0c6a113ae /Documentation | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp (diff) | |
| parent | Merge branches 'slab/cleanups' and 'slab/fixes' into for-linus (diff) | |
| download | linux-bb193c986a7104f718c1b92709e1e6e22ac3f864.tar.xz linux-bb193c986a7104f718c1b92709e1e6e22ac3f864.zip | |
Merge branch 'for-linus' of 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: fix slab_pad_check()
slub: release kobject if sysfs_create_group failed in sysfs_slab_add
SLUB: fix ARCH_KMALLOC_MINALIGN cases 64 and 256
SLUB: Fix some coding style issues
SLUB: Drop write permission to /proc/slabinfo
slab: remove duplicate kmem_cache_init_late() declarations
slub: change kmem_cache->align to record the real alignment
slub: use size and objsize orders to disable debug flags
slub: add option to disable higher order debugging slabs
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/vm/slub.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/vm/slub.txt b/Documentation/vm/slub.txt index bb1f5c6e28b3..510917ff59ed 100644 --- a/Documentation/vm/slub.txt +++ b/Documentation/vm/slub.txt @@ -41,6 +41,8 @@ Possible debug options are P Poisoning (object and padding) U User tracking (free and alloc) T Trace (please only use on single slabs) + O Switch debugging off for caches that would have + caused higher minimum slab orders - Switch all debugging off (useful if the kernel is configured with CONFIG_SLUB_DEBUG_ON) @@ -59,6 +61,14 @@ to the dentry cache with slub_debug=F,dentry +Debugging options may require the minimum possible slab order to increase as +a result of storing the metadata (for example, caches with PAGE_SIZE object +sizes). This has a higher liklihood of resulting in slab allocation errors +in low memory situations or if there's high fragmentation of memory. To +switch off debugging for such caches by default, use + + slub_debug=O + In case you forgot to enable debugging on the kernel command line: It is possible to enable debugging manually when the kernel is up. Look at the contents of: |