From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\)) Subject: Re: [PATCH BUGFIX] block, bfq: postpone rq preparation to insert or merge From: Paolo Valente In-Reply-To: <1525508378.5406.6.camel@gmx.de> Date: Sat, 5 May 2018 12:39:44 +0200 Cc: Jens Axboe , linux-block , LKML , Ulf Hansson , Mark Brown , linus.walleij@linaro.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name Message-Id: <9F155F9F-F6B2-465A-BA4D-A86FF6825071@linaro.org> References: <20180504171701.6876-1-paolo.valente@linaro.org> <1525463210.622.1.camel@gmx.de> <1525508378.5406.6.camel@gmx.de> To: Mike Galbraith List-ID: > Il giorno 05 mag 2018, alle ore 10:19, Mike Galbraith = ha scritto: >=20 > On Fri, 2018-05-04 at 21:46 +0200, Mike Galbraith wrote: >> Tentatively, I suspect you've just fixed the nasty stalls I reported = a >> while back. >=20 > Oh well, so much for optimism. It took a lot, but just hung. Yep, it'd have been a lot of luck, being your hang related to different operations from those touched by this fix. Maybe time-before-failure stretched because your system suffered from the illness cured by this fix too. BTW, if you didn't run out of patience with this permanent issue yet, I was thinking of two o three changes to retry to trigger your failure reliably. In case of success, I could restart racking my brains from there. Thanks, Paolo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751270AbeEEKjt (ORCPT ); Sat, 5 May 2018 06:39:49 -0400 Received: from mail-wm0-f50.google.com ([74.125.82.50]:51585 "EHLO mail-wm0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750830AbeEEKjs (ORCPT ); Sat, 5 May 2018 06:39:48 -0400 X-Google-Smtp-Source: AB8JxZpLPzCs/90LUf4Gdv4yQcEPh7RQQ5w2D+yzc4ipV8X6gFV40dMdfXY7n9dOsgRYPtqy8Mip9w== Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\)) Subject: Re: [PATCH BUGFIX] block, bfq: postpone rq preparation to insert or merge From: Paolo Valente In-Reply-To: <1525508378.5406.6.camel@gmx.de> Date: Sat, 5 May 2018 12:39:44 +0200 Cc: Jens Axboe , linux-block , LKML , Ulf Hansson , Mark Brown , linus.walleij@linaro.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name Message-Id: <9F155F9F-F6B2-465A-BA4D-A86FF6825071@linaro.org> References: <20180504171701.6876-1-paolo.valente@linaro.org> <1525463210.622.1.camel@gmx.de> <1525508378.5406.6.camel@gmx.de> To: Mike Galbraith X-Mailer: Apple Mail (2.3445.6.18) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id w45Adtfs000887 > Il giorno 05 mag 2018, alle ore 10:19, Mike Galbraith ha scritto: > > On Fri, 2018-05-04 at 21:46 +0200, Mike Galbraith wrote: >> Tentatively, I suspect you've just fixed the nasty stalls I reported a >> while back. > > Oh well, so much for optimism. It took a lot, but just hung. Yep, it'd have been a lot of luck, being your hang related to different operations from those touched by this fix. Maybe time-before-failure stretched because your system suffered from the illness cured by this fix too. BTW, if you didn't run out of patience with this permanent issue yet, I was thinking of two o three changes to retry to trigger your failure reliably. In case of success, I could restart racking my brains from there. Thanks, Paolo