From: Bart Van Assche <Bart.VanAssche@wdc.com>
To: "ming.lei@redhat.com" <ming.lei@redhat.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"jianchao.w.wang@oracle.com" <jianchao.w.wang@oracle.com>,
"axboe@kernel.dk" <axboe@kernel.dk>
Subject: Re: [RFC] blk-mq: clean up the hctx restart
Date: Thu, 2 Aug 2018 17:24:15 +0000 [thread overview]
Message-ID: <4868e0b82ac6e87aede7fc52da67d3a7913d680b.camel@wdc.com> (raw)
In-Reply-To: <20180802171723.GD8928@ming.t460p>
On Fri, 2018-08-03 at 01:17 +0800, Ming Lei wrote:
> Not mentioning big CPU utilization is consumed unnecessarily for iterating
> over all queues even though there is only one active queue, is this fair from
> system view?
I hope that someone will come up some day with a better solution than the
list_for_each_entry_rcu_rr() loop. But as long as such a solution has not yet
been found that loop should stay in order to preserve fair handling of large
numbers of LUNs.
Bart.
next prev parent reply other threads:[~2018-08-02 17:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 4:02 Jianchao Wang
2018-07-31 4:58 ` Ming Lei
2018-07-31 5:19 ` jianchao.wang
2018-07-31 6:16 ` Ming Lei
2018-08-01 2:17 ` jianchao.wang
2018-08-01 8:58 ` Ming Lei
2018-08-01 13:37 ` jianchao.wang
2018-08-02 10:39 ` Ming Lei
2018-08-02 15:52 ` Bart Van Assche
2018-08-02 16:58 ` Ming Lei
2018-08-02 17:08 ` Bart Van Assche
2018-08-02 17:17 ` Ming Lei
2018-08-02 17:24 ` Bart Van Assche [this message]
2018-08-03 0:35 ` Ming Lei
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=4868e0b82ac6e87aede7fc52da67d3a7913d680b.camel@wdc.com \
--to=bart.vanassche@wdc.com \
--cc=axboe@kernel.dk \
--cc=jianchao.w.wang@oracle.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=ming.lei@redhat.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®