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bio: shrink max number of pcpu cached bios 

The downside of the bio pcpu cache is that bios of a cpu will be never
freed unless there is new I/O issued from that cpu. We currently keep
max 512 bios, which feels too much, half it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/bc198e8efb27d8c740d80c8ce477432729075096.1667384020.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-11-02 15:18:23 +00:00 committed by Jens Axboe
parent b99182c501
commit 42b2b2fb6e
1 changed files with 1 additions and 1 deletions
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block/bio.c
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@ -27,7 +27,7 @@
#define ALLOC_CACHE_THRESHOLD 16
#define ALLOC_CACHE_SLACK 64
#define ALLOC_CACHE_MAX 512
#define ALLOC_CACHE_MAX 256
struct bio_alloc_cache {
struct bio *free_list;