Ksawlii/kernel_samsung_a53x
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block: disable I/O stats accounting by default

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While Android userspace (e.g. storaged) does use iostats via
/proc/diskstats, init will explicitly enable iostats for the devices on
which it is primarily used - sda and sdf. Avoid the 0.5-1% overhead for
block devices that do not need it.

Co-Authored-By: kdrag0n <dragon@khronodragon.com>
This commit is contained in:
haridhayal11 2022-03-02 05:40:52 +00:00 • committed by Ksawlii
parent 84b47ecf71
commit 58d55d8296
1 changed files with 5 additions and 3 deletions
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8
include/linux/blkdev.h
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@ -642,9 +642,11 @@ struct request_queue {
#define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
#define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
#define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_SAME_COMP) | \
(1 << QUEUE_FLAG_NOWAIT))
#define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_SAME_COMP) | \
(1 << QUEUE_FLAG_ADD_RANDOM))
#define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_SAME_COMP) | \
(1 << QUEUE_FLAG_POLL))
void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);