Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756124Ab1DLN7z (ORCPT ); Tue, 12 Apr 2011 09:59:55 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:51691 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755856Ab1DLN7y convert rfc822-to-8bit (ORCPT ); Tue, 12 Apr 2011 09:59:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=PDCmYrsLjBuoYOl5uV8QmDLy5YsQorWEX0stN1ZyqS9hLqZ5HrL3sqw3ziLPL/UYGb 9fUQ5ZcO4asQSYD4W0beWpHlYdEf4RX+fB7oCoUSmwVn6CF7ohEBqEgDvNxsIQfeM20p oajt9CdKMCTzvq8gZ2TKRtJtZWBjnrEtxvECY= MIME-Version: 1.0 In-Reply-To: <4DA44E8B.9040101@fusionio.com> References: <4DA44E8B.9040101@fusionio.com> Date: Tue, 12 Apr 2011 15:59:53 +0200 Message-ID: Subject: Re: regression - slow git rebase performance with 2.6.39-rcX kernel From: Zdenek Kabelac To: Jens Axboe Cc: Pekka Enberg , Linux Kernel Mailing List , Linus Torvalds , Andrew Morton , Theodore Tso Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1437 Lines: 37 2011/4/12 Jens Axboe : > On 2011-04-12 14:51, Pekka Enberg wrote: >> Hi, >> >> [ Fixed your empty CC list. ] >> >> On Tue, Apr 12, 2011 at 3:45 PM, Zdenek Kabelac >> wrote: >>> I'm noticing quite slower speed of my git rebase commands on my git >>> tree compared with 2.6.38 kernel. >>> I've ?T61 with SSD disc drive, ext4 fs, and by default deadline disk >>> io scheduler >>> The counter showing the number of 'rebased' patches on top of master >>> is going much slower. >>> When I boot 2.6.38 kernel it's much faster. >>> >>> Is it a known problem - or do I need to make a bisect ? >> >> No, I don't think it's a known problem. Git bisect would be helpful, >> obviously. > > Definitely, interesting. Bisect would help. I'll try a similar workload > here and see if I see any differences. How big is your rebase, and what > are the runtimes (approximately) on .38 vs .39-rc? > I've made just quick build with the small kernel without debug options enable - and the time is then equal with 2.6.38. So the difference is probably somewhere in debug build - I assume some debug option slowed down between 2.6.38 - 2.6.39 significantly. Zdenek -- 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/