From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f51.google.com (mail-wg0-f51.google.com [74.125.82.51]) by kanga.kvack.org (Postfix) with ESMTP id 05A536B0080 for ; Fri, 24 Oct 2014 03:54:28 -0400 (EDT) Received: by mail-wg0-f51.google.com with SMTP id b13so487494wgh.34 for ; Fri, 24 Oct 2014 00:54:28 -0700 (PDT) Received: from mail-wg0-x230.google.com (mail-wg0-x230.google.com. [2a00:1450:400c:c00::230]) by mx.google.com with ESMTPS id 8si4430015wju.88.2014.10.24.00.54.26 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 24 Oct 2014 00:54:27 -0700 (PDT) Received: by mail-wg0-f48.google.com with SMTP id k14so504258wgh.19 for ; Fri, 24 Oct 2014 00:54:26 -0700 (PDT) Date: Fri, 24 Oct 2014 09:54:23 +0200 From: Ingo Molnar Subject: Re: [RFC][PATCH 0/6] Another go at speculative page faults Message-ID: <20141024075423.GA24479@gmail.com> References: <20141020215633.717315139@infradead.org> <20141021162340.GA5508@gmail.com> <20141021170948.GA25964@node.dhcp.inet.fi> <20141021175603.GI3219@twins.programming.kicks-ass.net> <5448DB05.5050803@cn.fujitsu.com> <20141023110438.GQ21513@worktop.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141023110438.GQ21513@worktop.programming.kicks-ass.net> Sender: owner-linux-mm@kvack.org List-ID: To: Peter Zijlstra Cc: Lai Jiangshan , "Kirill A. Shutemov" , torvalds@linux-foundation.org, paulmck@linux.vnet.ibm.com, tglx@linutronix.de, akpm@linux-foundation.org, riel@redhat.com, mgorman@suse.de, oleg@redhat.com, mingo@redhat.com, minchan@kernel.org, kamezawa.hiroyu@jp.fujitsu.com, viro@zeniv.linux.org.uk, dave@stgolabs.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org * Peter Zijlstra wrote: > On Thu, Oct 23, 2014 at 06:40:05PM +0800, Lai Jiangshan wrote: > > On 10/22/2014 01:56 AM, Peter Zijlstra wrote: > > > On Tue, Oct 21, 2014 at 08:09:48PM +0300, Kirill A. Shutemov wrote: > > >> It would be interesting to see if the patchset affects non-condended case. > > >> Like a one-threaded workload. > > > > > > It does, and not in a good way, I'll have to look at that... :/ > > > > Maybe it is blamed to find_vma_srcu() that it doesn't take the advantage of > > the vmacache_find() and cause more cache-misses. > > Its what I thought initially, I tried doing perf record with and > without, but then I ran into perf diff not quite working for me and I've > yet to find time to kick that thing into shape. Might be the 'perf diff' regression fixed by this: 9ab1f50876db perf diff: Add missing hists__init() call at tool start I just pushed it out into tip:master. Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org