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BACKPORT: FROMLIST: block/bfq: Enable I/O statistics

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BFQ uses io_start_time_ns. That member variable is only set if I/O
statistics are enabled. Hence this patch that enables I/O statistics
at the time BFQ is associated with a request queue.

Compile-tested only.

Reported-by: Cixi Geng <cixi.geng1@unisoc.com>
Cc: Cixi Geng <cixi.geng1@unisoc.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
[ bvanassche: Left out the blk_stat_disable_accounting() call since ]
[ commit 68497092bd ("block: make queue stat accounting a         ]
[ reference") from kernel v5.17 has not been backported to the      ]
[ android13-5.15 branch.                                            ]
Bug: 235453574
Link: https://lore.kernel.org/linux-block/20220613163234.3593026-1-bvanassche@acm.org/T/#u
Change-Id: I5fad0fb3c7e9c6007aadd94ebb73d91c41143549
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche
2022-06-10 14:07:56 -07:00
committed by Carlos Llamas
parent 3a6c1e3359
commit 4e2d8ca450
1 changed files with 3 additions and 0 deletions
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3
block/bfq-iosched.c
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@@ -132,6 +132,7 @@
#include "blk-mq-tag.h"
#include "blk-mq-sched.h"
#include "bfq-iosched.h"
#include "blk-stat.h"
#include "blk-wbt.h"
#define BFQ_BFQQ_FNS(name) \
@@ -7038,6 +7039,8 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_type *e)
bfq_init_entity(&bfqd->oom_bfqq.entity, bfqd->root_group);
wbt_disable_default(q);
blk_stat_enable_accounting(q);
return 0;
out_free: