Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752796Ab3DKQFN (ORCPT ); Thu, 11 Apr 2013 12:05:13 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:24111 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751099Ab3DKQFL (ORCPT ); Thu, 11 Apr 2013 12:05:11 -0400 X-Authority-Analysis: v=2.0 cv=C51rOHz+ c=1 sm=0 a=rXTBtCOcEpjy1lPqhTCpEQ==:17 a=mNMOxpOpBa8A:10 a=ZzSxI7jMevMA:10 a=5SG0PmZfjMsA:10 a=IkcTkHD0fZMA:10 a=meVymXHHAAAA:8 a=mVTtbqeYs4EA:10 a=NufY4J3AAAAA:8 a=WeUUYMpTN4unLtgyyWYA:9 a=QEXdDO2ut3YA:10 a=re9sYKne76oA:10 a=rXTBtCOcEpjy1lPqhTCpEQ==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 74.67.115.198 Message-ID: <1365696307.9609.36.camel@gandalf.local.home> Subject: Re: [RT LATENCY] 249 microsecond latency caused by slub's unfreeze_partials() code. From: Steven Rostedt To: Christoph Lameter Cc: Joonsoo Kim , LKML , RT , Thomas Gleixner , Clark Williams , Pekka Enberg Date: Thu, 11 Apr 2013 12:05:07 -0400 In-Reply-To: <0000013db20ca149-0064fbb8-2f81-4323-9095-a38f6abb79c5-000000@email.amazonses.com> References: <1364010673.6345.156.camel@gandalf.local.home> <0000013da1f93be3-c3d42ae8-ff34-4c63-8094-77a83291ea19-000000@email.amazonses.com> <1364227073.6345.182.camel@gandalf.local.home> <1364228039.6345.183.camel@gandalf.local.home> <0000013da2ace21a-9e87fe8a-75c2-4b7c-b5e1-37ad196ce012-000000@email.amazonses.com> <1364234613.6345.184.camel@gandalf.local.home> <0000013da2ce20f8-0e3a64ef-67ed-4ab4-9f20-b77980c876c3-000000@email.amazonses.com> <1364236355.6345.185.camel@gandalf.local.home> <20130327025957.GA17125@lge.com> <1364355032.6345.200.camel@gandalf.local.home> <20130327061351.GB17125@lge.com> <0000013db20ca149-0064fbb8-2f81-4323-9095-a38f6abb79c5-000000@email.amazonses.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 882 Lines: 29 On Thu, 2013-03-28 at 17:30 +0000, Christoph Lameter wrote: > This patch requires the earlier bug fix. > > > Subject: slub: Make cpu partial slab support configurable > > cpu partial support can introduce level of indeterminism that is not wanted > in certain context (like a realtime kernel). Make it configurable. > > Signed-off-by: Christoph Lameter > Hi Christoph, I was wondering if you made any more forward progress with with patch yet. When it goes into mainline, I'd like to backport it to the -rt stable trees, and will probably make it enabled by default when PREEMPT_RT is enabled. Thanks! -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/