Return-Path: linux-kernel-owner@vger.kernel.org Date: Tue, 2 Dec 2014 14:29:20 -0500 From: Tejun Heo To: Jeff Layton Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, Al Viro Subject: Re: [RFC PATCH 00/14] nfsd/sunrpc: add support for a workqueue-based nfsd Message-ID: <20141202192920.GM10918@htj.dyndns.org> References: <1417544663-13299-1-git-send-email-jlayton@primarydata.com> <20141202191814.GK10918@htj.dyndns.org> <20141202142627.6f59f693@tlielax.poochiereds.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20141202142627.6f59f693@tlielax.poochiereds.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: Hello, Jeff. On Tue, Dec 02, 2014 at 02:26:27PM -0500, Jeff Layton wrote: > I'm already using WQ_UNBOUND workqueues. If that exempts this code from > the concurrency management, then that's probably not the problem. The > jobs here aren't terribly CPU intensive, but they can sleep for a long > time while waiting on I/O, etc... Yeap, noticed that. Replied in another message. > I don't think we necessarily need CPU locality (though that's nice to > have of course), but NUMA affinity will likely be important. It looked > like you had done some work a year or so ago to make unbound workqueues > prefer to queue work on the same NUMA node which meshes nicely with > what I think we want for this. Yeap, unbound workqueues are NUMA-affine by default. Thanks. -- tejun