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[PATCH] Manage jbd allocations from its own slabs

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JBD currently allocates commit and frozen buffers from slabs.  With
CONFIG_SLAB_DEBUG, its possible for an allocation to cross the page
boundary causing IO problems.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200127

So, instead of allocating these from regular slabs - manage allocation from
its own slabs and disable slab debug for these slabs.

[akpm@osdl.org: cleanups]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Badari Pulavarty 2006-08-27 01:23:52 -07:00 • committed by Linus Torvalds
parent 4c4d50f7b3
commit ea817398e6
4 changed files with 97 additions and 13 deletions
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3
include/linux/jbd.h
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@ -72,6 +72,9 @@ extern int journal_enable_debug;
#endif
extern void * __jbd_kmalloc (const char *where, size_t size, gfp_t flags, int retry);
extern void * jbd_slab_alloc(size_t size, gfp_t flags);
extern void jbd_slab_free(void *ptr, size_t size);
#define jbd_kmalloc(size, flags) \
__jbd_kmalloc(__FUNCTION__, (size), (flags), journal_oom_retry)
#define jbd_rep_kmalloc(size, flags) \