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| author | Christoph Hellwig <hch@lst.de> | 2021-10-12 13:12:22 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-18 06:17:36 -0600 |
| commit | 1a7e76e4f130332b5d3b0c72c4f664e59deb1239 (patch) | |
| tree | 6fef50bb5656bf235482cbd0d862527515b2f045 /block/bio.c | |
| parent | 6ce913fe3eee14f40f778e85999c9e599dda8c6b (diff) | |
| download | linux-stable-1a7e76e4f130332b5d3b0c72c4f664e59deb1239.tar.gz linux-stable-1a7e76e4f130332b5d3b0c72c4f664e59deb1239.tar.bz2 linux-stable-1a7e76e4f130332b5d3b0c72c4f664e59deb1239.zip | |
block: use SLAB_TYPESAFE_BY_RCU for the bio slab
This flags ensures that the pages will not be reused for non-bio
allocations before the end of an RCU grace period. With that we can
safely use a RCU lookup for bio polling as long as we are fine with
occasionally polling the wrong device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Mark Wunderlich <mark.wunderlich@intel.com>
Link: https://lore.kernel.org/r/20211012111226.760968-13-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index d5120451c36a..df45f4b996ac 100644 --- a/block/bio.c +++ b/block/bio.c @@ -87,7 +87,8 @@ static struct bio_slab *create_bio_slab(unsigned int size) snprintf(bslab->name, sizeof(bslab->name), "bio-%d", size); bslab->slab = kmem_cache_create(bslab->name, size, - ARCH_KMALLOC_MINALIGN, SLAB_HWCACHE_ALIGN, NULL); + ARCH_KMALLOC_MINALIGN, + SLAB_HWCACHE_ALIGN | SLAB_TYPESAFE_BY_RCU, NULL); if (!bslab->slab) goto fail_alloc_slab; |