From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 1679F6B01BC for ; Tue, 23 Mar 2010 19:19:24 -0400 (EDT) Received: by bwz19 with SMTP id 19so5709569bwz.6 for ; Tue, 23 Mar 2010 16:19:19 -0700 (PDT) Subject: Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance Mime-Version: 1.0 (Apple Message framework v1077) Content-Type: text/plain; charset=us-ascii From: Anton Starikov In-Reply-To: Date: Wed, 24 Mar 2010 00:19:15 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20100323102208.512c16cc.akpm@linux-foundation.org> <20100323173409.GA24845@elte.hu> <9D040E9A-80F2-468F-A6CD-A4912615CD3F@gmail.com> <9FC34DA1-D6DD-41E5-8B76-0712A813C549@gmail.com> Sender: owner-linux-mm@kvack.org To: Linus Torvalds Cc: Greg KH , stable@kernel.org, Ingo Molnar , Andrew Morton , linux-mm@kvack.org, Linux Kernel Mailing List , bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org, Peter Zijlstra List-ID: Tomorrow I will try to patch and check 2.6.33 and see are this patches = enough to restore performance or not, because on 2.6.33 kernel = performance issue also used to involve somehow crgoup business (and = performance was terrible even comparing to broken 2.6.32). If it will = not fix 2.6.33, then I will ask to reopen the bug, otherwise I will post = to stable@. Thanks again for help, Anton. On Mar 24, 2010, at 12:04 AM, Linus Torvalds wrote: >=20 >=20 > On Tue, 23 Mar 2010, Anton Starikov wrote: >>=20 >> I think we got a winner! >>=20 >> Problem seems to be fixed. >>=20 >> Just for record, I used next patches: >>=20 >> 59c33fa7791e9948ba467c2b83e307a0d087ab49 >> 5d0b7235d83eefdafda300656e97d368afcafc9a >> 1838ef1d782f7527e6defe87e180598622d2d071 >> 4126faf0ab7417fbc6eb99fb0fd407e01e9e9dfe >> bafaecd11df15ad5b1e598adc7736afcd38ee13d >> 0d1622d7f526311d87d7da2ee7dd14b73e45d3fc >=20 > Ok. If you have performance numbers for before/after these patches for=20= > your actual workload, I'd suggest posting them to stable@kernel.org, = and=20 > maybe those rwsem fixes will get back-ported. >=20 > The patches are pretty small, and should be fairly safe. So they are=20= > certainly stable material. >=20 > Linus -- 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