All of lore.kernel.org
 help / color / mirror / Atom feed
From: Yu Kuai <yukuai1@huaweicloud.com>
To: tj@kernel.org, hch@infradead.org, josef@toxicpanda.com, axboe@kernel.dk
Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org, yukuai3@huawei.com,
	yukuai1@huaweicloud.com, yi.zhang@huawei.com
Subject: [PATCH -next 1/4] blk-iocost: track whether iocg is still online
Date: Sat, 17 Dec 2022 11:05:24 +0800	[thread overview]
Message-ID: <20221217030527.1250083-2-yukuai1@huaweicloud.com> (raw)
In-Reply-To: <20221217030527.1250083-1-yukuai1@huaweicloud.com>

From: Yu Kuai <yukuai3@huawei.com>

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

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 block/blk-iocost.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 3aeb8538f0c3..1498879c4a52 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -459,6 +459,8 @@ struct ioc_gq {
 	struct blkg_policy_data		pd;
 	struct ioc			*ioc;
 
+	bool online;
+
 	/*
 	 * A iocg can get its weight from two sources - an explicit
 	 * per-device-cgroup configuration or the default weight of the
@@ -2952,6 +2954,7 @@ 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));
@@ -2977,6 +2980,19 @@ static void ioc_pd_init(struct blkg_policy_data *pd)
 	spin_unlock_irqrestore(&ioc->lock, flags);
 }
 
+static void ioc_pd_offline(struct blkg_policy_data *pd)
+{
+	struct ioc_gq *iocg = pd_to_iocg(pd);
+	struct ioc *ioc = iocg->ioc;
+	unsigned long flags;
+
+	if (ioc) {
+		spin_lock_irqsave(&ioc->lock, flags);
+		iocg->online = false;
+		spin_unlock_irqrestore(&ioc->lock, flags);
+	}
+}
+
 static void ioc_pd_free(struct blkg_policy_data *pd)
 {
 	struct ioc_gq *iocg = pd_to_iocg(pd);
@@ -3467,6 +3483,7 @@ static struct blkcg_policy blkcg_policy_iocost = {
 	.cpd_free_fn	= ioc_cpd_free,
 	.pd_alloc_fn	= ioc_pd_alloc,
 	.pd_init_fn	= ioc_pd_init,
+	.pd_offline_fn	= ioc_pd_offline,
 	.pd_free_fn	= ioc_pd_free,
 	.pd_stat_fn	= ioc_pd_stat,
 };
-- 
2.31.1


WARNING: multiple messages have this Message-ID (diff)
From: Yu Kuai <yukuai1-XF6JlduFytWkHkcT6e4Xnw@public.gmane.org>
To: tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	josef-DigfWCa+lFGyeJad7bwFQA@public.gmane.org,
	axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	yukuai3-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
	yukuai1-XF6JlduFytWkHkcT6e4Xnw@public.gmane.org,
	yi.zhang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org
Subject: [PATCH -next 1/4] blk-iocost: track whether iocg is still online
Date: Sat, 17 Dec 2022 11:05:24 +0800	[thread overview]
Message-ID: <20221217030527.1250083-2-yukuai1@huaweicloud.com> (raw)
In-Reply-To: <20221217030527.1250083-1-yukuai1-XF6JlduFytWkHkcT6e4Xnw@public.gmane.org>

From: Yu Kuai <yukuai3-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>

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

Signed-off-by: Yu Kuai <yukuai3-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
 block/blk-iocost.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 3aeb8538f0c3..1498879c4a52 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -459,6 +459,8 @@ struct ioc_gq {
 	struct blkg_policy_data		pd;
 	struct ioc			*ioc;
 
+	bool online;
+
 	/*
 	 * A iocg can get its weight from two sources - an explicit
 	 * per-device-cgroup configuration or the default weight of the
@@ -2952,6 +2954,7 @@ 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));
@@ -2977,6 +2980,19 @@ static void ioc_pd_init(struct blkg_policy_data *pd)
 	spin_unlock_irqrestore(&ioc->lock, flags);
 }
 
+static void ioc_pd_offline(struct blkg_policy_data *pd)
+{
+	struct ioc_gq *iocg = pd_to_iocg(pd);
+	struct ioc *ioc = iocg->ioc;
+	unsigned long flags;
+
+	if (ioc) {
+		spin_lock_irqsave(&ioc->lock, flags);
+		iocg->online = false;
+		spin_unlock_irqrestore(&ioc->lock, flags);
+	}
+}
+
 static void ioc_pd_free(struct blkg_policy_data *pd)
 {
 	struct ioc_gq *iocg = pd_to_iocg(pd);
@@ -3467,6 +3483,7 @@ static struct blkcg_policy blkcg_policy_iocost = {
 	.cpd_free_fn	= ioc_cpd_free,
 	.pd_alloc_fn	= ioc_pd_alloc,
 	.pd_init_fn	= ioc_pd_init,
+	.pd_offline_fn	= ioc_pd_offline,
 	.pd_free_fn	= ioc_pd_free,
 	.pd_stat_fn	= ioc_pd_stat,
 };
-- 
2.31.1


  reply	other threads:[~2022-12-17  2:44 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-17  3:05 [PATCH -next 0/4] blk-iocost: make sure parent iocg is exited before child Yu Kuai
2022-12-17  3:05 ` Yu Kuai
2022-12-17  3:05 ` Yu Kuai [this message]
2022-12-17  3:05   ` [PATCH -next 1/4] blk-iocost: track whether iocg is still online Yu Kuai
2022-12-21 10:33   ` Christoph Hellwig
2022-12-26  1:10     ` Yu Kuai
2022-12-26  1:10       ` Yu Kuai
2022-12-17  3:05 ` [PATCH -next 2/4] blk-iocost: don't throttle bio if iocg is offlined Yu Kuai
2022-12-19 21:28   ` Tejun Heo
2022-12-20  9:38     ` Yu Kuai
2022-12-20  9:38       ` Yu Kuai
2022-12-17  3:05 ` [PATCH -next 3/4] blk-iocost: dispatch all throttled bio in ioc_pd_offline Yu Kuai
2022-12-19 21:31   ` Tejun Heo
2022-12-19 21:31     ` Tejun Heo
2022-12-17  3:05 ` [PATCH -next 4/4] blk-iocost: guarantee the exit order of iocg Yu Kuai

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20221217030527.1250083-2-yukuai1@huaweicloud.com \
    --to=yukuai1@huaweicloud.com \
    --cc=axboe@kernel.dk \
    --cc=cgroups@vger.kernel.org \
    --cc=hch@infradead.org \
    --cc=josef@toxicpanda.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tj@kernel.org \
    --cc=yi.zhang@huawei.com \
    --cc=yukuai3@huawei.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.