From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752911AbaAGPrz (ORCPT ); Tue, 7 Jan 2014 10:47:55 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:55930 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752707AbaAGPrp (ORCPT ); Tue, 7 Jan 2014 10:47:45 -0500 Date: Tue, 7 Jan 2014 07:47:43 -0800 From: Christoph Hellwig To: Jens Axboe Cc: Jan Kara , Christoph Hellwig , LKML Subject: Re: [PATCH 0/3 v2] Use lockless lists for smp_call_function_single() Message-ID: <20140107154743.GA17462@infradead.org> References: <1387387418-10005-1-git-send-email-jack@suse.cz> <20131219153154.GI30200@kernel.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131219153154.GI30200@kernel.dk> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 19, 2013 at 08:31:54AM -0700, Jens Axboe wrote: > On Wed, Dec 18 2013, Jan Kara wrote: > > Hello, > > > > these three patches make smp_call_function_single() use lockless lists and > > cleanup abuse of csd.list in the block layer. I have some use for lockless > > smp_call_function_single() in printk code and that's why I've picked up > > Christoph's patch. Jens, can you have a look at the series please? > > > > Changes since v1: > > * Reordered patches to a more sensible order. > > Thanks Jan, I'll throw this into the testing mix for 3.14. Will be a > little delayed over christmas, with holidays and family visiting. Did you make any progress? Btw, I'd love if you could queue up the patch to use __smp_call_function_single directly in the block layer for 3.14. Independent of wether a llist using __smp_call_function_single is faster than one using the lock we get down from a list plus llist to just one of them, so I can't see how that patch will cause an issue. With all the prep patches already in it can be queue up independently of Jan's series as well.