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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2007-05-06 14:49:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:12:55 -0700 |
| commit | 824ebef122153a03925ae0ed211b4e8568d1c8db (patch) | |
| tree | 2a9ce9acc187b6a6985064c773cbf850ad405a07 | |
| parent | f0f3980b21508bd573eff1746d469436f50a903d (diff) | |
| download | linux-stable-824ebef122153a03925ae0ed211b4e8568d1c8db.tar.gz linux-stable-824ebef122153a03925ae0ed211b4e8568d1c8db.tar.bz2 linux-stable-824ebef122153a03925ae0ed211b4e8568d1c8db.zip | |
fault injection: fix failslab with CONFIG_NUMA
Currently failslab injects failures into ____cache_alloc(). But with enabling
CONFIG_NUMA it's not enough to let actual slab allocator functions (kmalloc,
kmem_cache_alloc, ...) return NULL.
This patch moves fault injection hook inside of __cache_alloc() and
__cache_alloc_node(). These are lower call path than ____cache_alloc() and
enable to inject faulures to slab allocators with CONFIG_NUMA.
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/slab.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/mm/slab.c b/mm/slab.c index 583644f6ae11..2a3cbd6e675d 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3170,7 +3170,7 @@ static int __init failslab_debugfs(void) struct dentry *dir; int err; - err = init_fault_attr_dentries(&failslab.attr, "failslab"); + err = init_fault_attr_dentries(&failslab.attr, "failslab"); if (err) return err; dir = failslab.attr.dentries.dir; @@ -3208,9 +3208,6 @@ static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags) check_irq_off(); - if (should_failslab(cachep, flags)) - return NULL; - ac = cpu_cache_get(cachep); if (likely(ac->avail)) { STATS_INC_ALLOCHIT(cachep); @@ -3402,6 +3399,9 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, unsigned long save_flags; void *ptr; + if (should_failslab(cachep, flags)) + return NULL; + cache_alloc_debugcheck_before(cachep, flags); local_irq_save(save_flags); @@ -3472,6 +3472,9 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller) unsigned long save_flags; void *objp; + if (should_failslab(cachep, flags)) + return NULL; + cache_alloc_debugcheck_before(cachep, flags); local_irq_save(save_flags); objp = __do_cache_alloc(cachep, flags); |