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| author | Christoph Lameter | 2007-05-06 23:49:38 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2007-05-07 21:12:53 +0200 |
| commit | 614410d5892af5f86d0ec14e28f9f6d5f4ac9e9b (patch) | |
| tree | 616c8437f45590a0ca6e2efdc2a5dfb61799d0ec /include | |
| parent | SLUB: change default alignments (diff) | |
| download | kernel-qcow2-linux-614410d5892af5f86d0ec14e28f9f6d5f4ac9e9b.tar.gz kernel-qcow2-linux-614410d5892af5f86d0ec14e28f9f6d5f4ac9e9b.tar.xz kernel-qcow2-linux-614410d5892af5f86d0ec14e28f9f6d5f4ac9e9b.zip | |
SLUB: allocate smallest object size if the user asks for 0 bytes
Makes SLUB behave like SLAB in this area to avoid issues....
Throw a stack dump to alert people.
At some point the behavior should be switched back. NULL is no memory as
far as I can tell and if the use asked for 0 bytes then he need to get no
memory.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/slub_def.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index 30b154ce7289..f8e0c86c48a9 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -80,8 +80,12 @@ extern struct kmem_cache kmalloc_caches[KMALLOC_SHIFT_HIGH + 1]; */ static inline int kmalloc_index(int size) { - if (size == 0) - return 0; + /* + * We should return 0 if size == 0 but we use the smallest object + * here for SLAB legacy reasons. + */ + WARN_ON_ONCE(size == 0); + if (size > 64 && size <= 96) return 1; if (size > 128 && size <= 192) |