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| author | Anna Leuschner <anna.m.leuschner@gmail.com> | 2012-10-22 21:53:36 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-10-22 22:00:26 +0200 |
| commit | 386bc35a2d548c28a5083b2e162a20251b37cab5 (patch) | |
| tree | 14d3f0ac36cd9b56b535c3e5aa3c6ed152d6cf6b | |
| parent | 65c77fd9e8a1c8c3da0bbbea6b7efa3d6ef265f8 (diff) | |
| download | linux-386bc35a2d548c28a5083b2e162a20251b37cab5.tar.gz linux-386bc35a2d548c28a5083b2e162a20251b37cab5.tar.bz2 linux-386bc35a2d548c28a5083b2e162a20251b37cab5.zip | |
vfs: fix: don't increase bio_slab_max if krealloc() fails
Without the patch, bio_slab_max, representing bio_slabs capacity, is increased before krealloc() of bio_slabs. If krealloc() fails, bio_slab_max is too high. Fix that by only updating bio_slab_max if krealloc() is successful.
Signed-off-by: Anna Leuschner <anna.m.leuschner@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/bio.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -75,6 +75,7 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size) unsigned int sz = sizeof(struct bio) + extra_size; struct kmem_cache *slab = NULL; struct bio_slab *bslab, *new_bio_slabs; + unsigned int new_bio_slab_max; unsigned int i, entry = -1; mutex_lock(&bio_slab_lock); @@ -97,12 +98,13 @@ static struct kmem_cache *bio_find_or_create_slab(unsigned int extra_size) goto out_unlock; if (bio_slab_nr == bio_slab_max && entry == -1) { - bio_slab_max <<= 1; + new_bio_slab_max = bio_slab_max << 1; new_bio_slabs = krealloc(bio_slabs, - bio_slab_max * sizeof(struct bio_slab), + new_bio_slab_max * sizeof(struct bio_slab), GFP_KERNEL); if (!new_bio_slabs) goto out_unlock; + bio_slab_max = new_bio_slab_max; bio_slabs = new_bio_slabs; } if (entry == -1) |