From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE39CC49EA2 for ; Tue, 22 Jun 2021 17:26:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC81F61360 for ; Tue, 22 Jun 2021 17:26:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232186AbhFVR2v (ORCPT ); Tue, 22 Jun 2021 13:28:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232225AbhFVR2u (ORCPT ); Tue, 22 Jun 2021 13:28:50 -0400 X-Greylist: delayed 77447 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 22 Jun 2021 10:26:34 PDT Received: from vulcan.natalenko.name (vulcan.natalenko.name [IPv6:2001:19f0:6c00:8846:5400:ff:fe0c:dfa0]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3683C061756; Tue, 22 Jun 2021 10:26:34 -0700 (PDT) Received: from spock.localnet (unknown [151.237.229.131]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by vulcan.natalenko.name (Postfix) with ESMTPSA id 26F85AF15BA; Tue, 22 Jun 2021 19:26:33 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=natalenko.name; s=dkim-20170712; t=1624382793; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=P/jl1lZ86jFUUXH/ABUzJSq4C2zlwk6QLR2iPXI/BnU=; b=qTB4RmxQASXEX2qWc1m2ZFYvuVScXp68rg5ykkoa08rX1UduVife2B+rgg8/OOVYjiTsXs Q6VJYMFNGssXOB1iqbDjiUmk9KeX8Ww3bBwtGsI9kLAmKRsj4aj8FsEXtts23KAx3ziYHd xYxlTflqvsSadaqWzOWAL4NjKP2fbG4= From: Oleksandr Natalenko To: Jan Kara Cc: Paolo Valente , Jens Axboe , linux-block , Linux Kernel Mailing List , Luca Mariotti , Holger =?ISO-8859-1?Q?Hoffst=E4tte?= , Pietro Pedroni , Piotr Gorski , Khazhy Kumykov , Jan Kara Subject: Re: [PATCH FIXES/IMPROVEMENTS 0/7] block, bfq: preserve control, boost throughput, fix bugs Date: Tue, 22 Jun 2021 19:26:31 +0200 Message-ID: <1829163.dQHRSAV4G1@spock> In-Reply-To: <20210622162948.GJ14261@quack2.suse.cz> References: <20210619140948.98712-1-paolo.valente@linaro.org> <8003699.Qy64SzLKsf@spock> <20210622162948.GJ14261@quack2.suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Ahoj. On =C3=BAter=C3=BD 22. =C4=8Dervna 2021 18:29:48 CEST Jan Kara wrote: > On Tue 22-06-21 09:35:05, Oleksandr Natalenko wrote: > > On =C3=BAter=C3=BD 22. =C4=8Dervna 2021 9:08:43 CEST Paolo Valente wrot= e: > > > CCing also Jan and Khazhy, because in your commit log I see also the > > > commit on bfq_requests_merged(). > > >=20 > > > Is this OOPS reproducible for you? > >=20 > > No, I haven't found a reproducer, at least yet. It took half a day of > > uptime to hit this, so might not be that easy. >=20 > Hum, if you can acquire a crash dump it would be the easiest I guess. We'd > need to find out more about the request we crash on - whether it's > otherwise valid, in what state it is etc... Yes, I understand that. Once (and if) I reproduce it reliably, of course. Thanks. =2D-=20 Oleksandr Natalenko (post-factum)