From: Ming Lei ming.lei@redhat.com
[ Upstream commit b654f7a51ffb386131de42aa98ed831f8c126546 ]
Device mapper bioset often has big bio_slab size, which can be more than 1000, then 8byte can't hold the slab name any more, cause the kmem_cache allocation warning of 'kmem_cache of name 'bio-108' already exists'.
Fix the warning by extending bio_slab->name to 12 bytes, but fix output of /proc/slabinfo
Reported-by: Guangwu Zhang guazhang@redhat.com Signed-off-by: Ming Lei ming.lei@redhat.com Link: https://lore.kernel.org/r/20250228132656.2838008-1-ming.lei@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/bio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/bio.c b/block/bio.c index ac4d77c889322..43d4ae26f4758 100644 --- a/block/bio.c +++ b/block/bio.c @@ -77,7 +77,7 @@ struct bio_slab { struct kmem_cache *slab; unsigned int slab_ref; unsigned int slab_size; - char name[8]; + char name[12]; }; static DEFINE_MUTEX(bio_slab_lock); static DEFINE_XARRAY(bio_slabs);