From: Mike Galbraith <efault@gmx.de>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Jeff Layton <jlayton@kernel.org>,
linux-nfs@vger.kernel.org
Subject: Re: NFS: 82ms wakeup latency 4.14-rc4
Date: Mon, 18 Dec 2017 18:00:05 +0100 [thread overview]
Message-ID: <1513616405.7113.18.camel@gmx.de> (raw)
In-Reply-To: <20171218163559.GA11829@fieldses.org>
On Mon, 2017-12-18 at 11:35 -0500, J. Bruce Fields wrote:
>
> Like I say, I don't really understand the issues here, so it's more a
> question than an objection.... (I don't know any reason a
> cond_resched() would be bad there.)
Think of it this way: what all can be queued up behind that kworker
that is hogging CPU for huge swaths of time? It's not only userspace
that suffers.
-Mike
next prev parent reply other threads:[~2017-12-18 17:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-18 15:17 NFS: 82ms wakeup latency 4.14-rc4 Mike Galbraith
2017-12-18 15:31 ` Mike Galbraith
2017-12-18 16:35 ` J. Bruce Fields
2017-12-18 16:48 ` Mike Galbraith
2017-12-18 17:00 ` Mike Galbraith [this message]
2017-12-18 17:17 ` Mike Galbraith
2017-12-18 17:27 ` J. Bruce Fields
2017-12-18 17:47 ` Mike Galbraith
2017-12-18 18:34 ` Mike Galbraith
2017-12-18 17:24 ` Trond Myklebust
2017-12-18 17:26 ` Mike Galbraith
2018-01-02 20:29 ` [patch] fs/nfs: Add a resched point to nfs_commit_release_pages() Mike Galbraith
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