Commit b654f7a5 authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

block: fix 'kmem_cache of name 'bio-108' already exists' 



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: default avatarGuangwu Zhang <guazhang@redhat.com>
Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20250228132656.2838008-1-ming.lei@redhat.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a6aa36e9

block/bio.c

+1 −1
Original line number Diff line number Diff line
@@ -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);