diff mbox series

[11/16] block: use SLAB_TYPESAFE_BY_RCU for the bio slab

Message ID 20210615131034.752623-12-hch@lst.de (mailing list archive)
State New
Headers show
Series [01/16] direct-io: remove blk_poll support | expand

Commit Message

Christoph Hellwig June 15, 2021, 1:10 p.m. UTC
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>
---
 block/bio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/block/bio.c b/block/bio.c
index 44205dfb6b60..de5505d7018e 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -82,7 +82,8 @@  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;