Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932533AbbHXIjX (ORCPT ); Mon, 24 Aug 2015 04:39:23 -0400 Received: from mail-la0-f43.google.com ([209.85.215.43]:33828 "EHLO mail-la0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751980AbbHXIjV (ORCPT ); Mon, 24 Aug 2015 04:39:21 -0400 From: Rasmus Villemoes To: Ingo Molnar Cc: George Spelvin , dave@sr71.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org, peterz@infradead.org, riel@redhat.com, rientjes@google.com, torvalds@linux-foundation.org Subject: Re: [PATCH 3/3 v3] mm/vmalloc: Cache the vmalloc memory info Organization: D03 References: <20150823060443.GA9882@gmail.com> <20150823064603.14050.qmail@ns.horizon.com> <20150823081750.GA28349@gmail.com> <87lhd1wwtz.fsf@rasmusvillemoes.dk> <20150824065809.GA13082@gmail.com> X-Hashcash: 1:20:150824:riel@redhat.com::TKoazI/uvXXkwUkH:000c7C X-Hashcash: 1:20:150824:mingo@kernel.org::xM/5nAsuQjqe+tIY:013eg X-Hashcash: 1:20:150824:peterz@infradead.org::vv83/oywDDIU6k8o:000000000000000000000000000000000000000000wF8 X-Hashcash: 1:20:150824:dave@sr71.net::C7ZvR+ED7fEuIjd8:000020qL X-Hashcash: 1:20:150824:linux-kernel@vger.kernel.org::vGdlX7U27rFH885r:00000000000000000000000000000000025cd X-Hashcash: 1:20:150824:linux@horizon.com::LS0/2A6MzGwku5x7:000000000000000000000000000000000000000000002WSq X-Hashcash: 1:20:150824:torvalds@linux-foundation.org::5cY2e9YobH/srMFo:000000000000000000000000000000003Lzd X-Hashcash: 1:20:150824:rientjes@google.com::wIusgJZJN9iOx3iF:0000000000000000000000000000000000000000004Xrl X-Hashcash: 1:20:150824:linux-mm@kvack.org::dbAWf+YL5as86eDj:0000000000000000000000000000000000000000000IBhO Date: Mon, 24 Aug 2015 10:39:17 +0200 In-Reply-To: <20150824065809.GA13082@gmail.com> (Ingo Molnar's message of "Mon, 24 Aug 2015 08:58:09 +0200") Message-ID: <877fol5bd6.fsf@rasmusvillemoes.dk> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 800 Lines: 23 On Mon, Aug 24 2015, Ingo Molnar wrote: > > Thanks, is the fixed up changelog below better? > Yes, though Linus specifically referred to "make test" (but I guess one could/should consider that part of the build process). Rasmus > mm/vmalloc: Cache the vmalloc memory info > > Linus reported that for scripting-intense workloads such as the > Git build, glibc's qsort will read /proc/meminfo for every process > created (by way of get_phys_pages()), which causes the Git build > to generate a surprising amount of kernel overhead. -- 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/