Commit ddaab3ec authored by Yu Kuai's avatar Yu Kuai Committed by openeuler-sync-bot
Browse files

blk-iocost: track whether iocg is still online 

hulk inclusion
category: bugfix
bugzilla: 188107, https://gitee.com/openeuler/kernel/issues/I665S2


CVE: NA

--------------------------------

blkcg_gq->online can't be used in iocost because it get cleared only after
all policies are offlined. This patch add a new field 'online' in iocg.

Signed-off-by: default avatarYu Kuai <yukuai3@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
(cherry picked from commit 3fcd5793)
parent b7d83471

block/blk-iocost.c

+4 −0
Original line number Diff line number Diff line
@@ -486,6 +486,7 @@ struct ioc_gq { 
	u32				inuse;



	u32				last_inuse;

	bool				online;

	s64				saved_margin;



	sector_t			cursor;		/* to detect randio */
@@ -2939,6 +2940,7 @@ static void ioc_pd_init(struct blkg_policy_data *pd) 
	ioc_now(ioc, &now);



	iocg->ioc = ioc;

	iocg->online = true;

	atomic64_set(&iocg->vtime, now.vnow);

	atomic64_set(&iocg->done_vtime, now.vnow);

	atomic64_set(&iocg->active_period, atomic64_read(&ioc->cur_period));
@@ -2973,6 +2975,8 @@ static void ioc_pd_offline(struct blkg_policy_data *pd) 
	if (ioc) {

		spin_lock_irqsave(&ioc->lock, flags);



		iocg->online = false;



		if (!list_empty(&iocg->active_list)) {

			struct ioc_now now;