From: Christoph Hellwig <hch@infradead.org>
To: Ming Lei <ming.lei@canonical.com>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-kernel@vger.kernel.org,
"Justin M. Forbes" <jforbes@fedoraproject.org>,
Jeff Moyer <jmoyer@redhat.com>, "v4.0" <stable@vger.kernel.org>,
Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH v6] block: loop: avoiding too many pending per work I/O
Date: Fri, 1 May 2015 03:17:37 -0700 [thread overview]
Message-ID: <20150501101737.GA18577@infradead.org> (raw)
In-Reply-To: <1430450881-10881-1-git-send-email-ming.lei@canonical.com>
On Fri, May 01, 2015 at 11:28:01AM +0800, Ming Lei wrote:
> If there are too many pending per work I/O, too many
> high priority work thread can be generated so that
> system performance can be effected.
>
> This patch limits the max pending per work I/O as 16,
> and will fackback to single queue mode when the max
> number is reached.
Why would you do this fall back? Shouldn't we just communicate
a concurrency limit to the workqueue code?
next prev parent reply other threads:[~2015-05-01 10:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-01 3:28 [PATCH v6] block: loop: avoiding too many pending per work I/O Ming Lei
2015-05-01 10:17 ` Christoph Hellwig [this message]
2015-05-01 13:36 ` Ming Lei
2015-05-01 14:22 ` Tejun Heo
2015-05-01 15:05 ` Christoph Hellwig
2015-05-01 15:47 ` Tejun Heo
2015-05-02 15:09 ` Ming Lei
2015-05-02 14:56 ` Ming Lei
2015-05-03 1:52 ` Tejun Heo
2015-05-04 12:54 ` Ming Lei
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