diff options
| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2022-09-06 21:48:40 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-27 04:46:13 +0200 |
| commit | e73cb368be374165b531d5ab1e74596b98e766a8 (patch) | |
| tree | f205b72920319aa15708520a7715d62b5d419d63 /tools/testing/radix-tree | |
| parent | radix tree test suite: add pr_err define (diff) | |
| download | linux-e73cb368be374165b531d5ab1e74596b98e766a8.tar.xz linux-e73cb368be374165b531d5ab1e74596b98e766a8.zip | |
radix tree test suite: add kmem_cache_set_non_kernel()
kmem_cache_set_non_kernel() is a mechanism to allow a certain number of
kmem_cache_alloc requests to succeed even when GFP_KERNEL is not set in
the flags. This functionality allows for testing different paths though
the code.
Link: https://lkml.kernel.org/r/20220906194824.2110408-4-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/testing/radix-tree')
| -rw-r--r-- | tools/testing/radix-tree/linux.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c index d5c1bcba86fe..277aa8b70abc 100644 --- a/tools/testing/radix-tree/linux.c +++ b/tools/testing/radix-tree/linux.c @@ -23,15 +23,26 @@ struct kmem_cache { int nr_objs; void *objs; void (*ctor)(void *); + unsigned int non_kernel; }; +void kmem_cache_set_non_kernel(struct kmem_cache *cachep, unsigned int val) +{ + cachep->non_kernel = val; +} + void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, int gfp) + { void *p; - if (!(gfp & __GFP_DIRECT_RECLAIM)) - return NULL; + if (!(gfp & __GFP_DIRECT_RECLAIM)) { + if (!cachep->non_kernel) + return NULL; + + cachep->non_kernel--; + } pthread_mutex_lock(&cachep->lock); if (cachep->nr_objs) { @@ -90,5 +101,6 @@ kmem_cache_create(const char *name, unsigned int size, unsigned int align, ret->nr_objs = 0; ret->objs = NULL; ret->ctor = ctor; + ret->non_kernel = 0; return ret; } |