mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
fab9963a69
Remove the SLAB specific function slab_should_failslab(), by moving the check against fault-injection for the bootstrap slab, into the shared function should_failslab() (used by both SLAB and SLUB). This is a step towards sharing alloc_hook's between SLUB and SLAB. This bootstrap slab "kmem_cache" is used for allocating struct kmem_cache objects to the allocator itself. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
#include <linux/fault-inject.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include "slab.h"
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static struct {
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struct fault_attr attr;
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bool ignore_gfp_reclaim;
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bool cache_filter;
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} failslab = {
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.attr = FAULT_ATTR_INITIALIZER,
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.ignore_gfp_reclaim = true,
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.cache_filter = false,
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};
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bool should_failslab(struct kmem_cache *s, gfp_t gfpflags)
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{
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/* No fault-injection for bootstrap cache */
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if (unlikely(s == kmem_cache))
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return false;
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if (gfpflags & __GFP_NOFAIL)
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return false;
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if (failslab.ignore_gfp_reclaim && (gfpflags & __GFP_RECLAIM))
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return false;
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if (failslab.cache_filter && !(s->flags & SLAB_FAILSLAB))
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return false;
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return should_fail(&failslab.attr, s->object_size);
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}
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static int __init setup_failslab(char *str)
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{
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return setup_fault_attr(&failslab.attr, str);
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}
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__setup("failslab=", setup_failslab);
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#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
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static int __init failslab_debugfs_init(void)
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{
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struct dentry *dir;
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umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
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dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
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if (IS_ERR(dir))
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return PTR_ERR(dir);
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if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
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&failslab.ignore_gfp_reclaim))
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goto fail;
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if (!debugfs_create_bool("cache-filter", mode, dir,
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&failslab.cache_filter))
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goto fail;
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return 0;
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fail:
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debugfs_remove_recursive(dir);
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return -ENOMEM;
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}
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late_initcall(failslab_debugfs_init);
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#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
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