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=-0.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 603E8C71156 for ; Mon, 30 Nov 2020 16:29:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF1D92076E for ; Mon, 30 Nov 2020 16:29:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="cb8lgFKs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728885AbgK3Q3Y (ORCPT ); Mon, 30 Nov 2020 11:29:24 -0500 Received: from mout.gmx.net ([212.227.15.19]:43335 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728863AbgK3Q3Y (ORCPT ); Mon, 30 Nov 2020 11:29:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1606753639; bh=g7gIuzXdJkNWVgDL+psau+dbSeSo+v1g6CMrN/YRsHc=; h=X-UI-Sender-Class:Subject:From:To:Cc:Date:In-Reply-To:References; b=cb8lgFKsWvlHg9BxwLAsvwUNmGGb7b/UPHsZB9g3WOSf7FL7epADsDhM6gv8/BayY /mk/w09tpYqvjbdsHVQRr7lCCy60MduiNGyC5nstJGRHX9zYBX0CPjeByB0rscfx0R XSCzGn/eiRuvMJh8fYTd4Ws7o07NRkLfc9y5+S7Q= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from homer.fritz.box ([185.221.151.20]) by mail.gmx.com (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M3lY1-1kk38O0J2x-000tvU; Mon, 30 Nov 2020 17:27:19 +0100 Message-ID: <2658a2a26e53826687cd7b22f424e2d3319423dd.camel@gmx.de> Subject: Re: scheduling while atomic in z3fold From: Mike Galbraith To: Sebastian Andrzej Siewior Cc: Oleksandr Natalenko , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Steven Rostedt , Thomas Gleixner , linux-rt-users@vger.kernel.org Date: Mon, 30 Nov 2020 17:27:17 +0100 In-Reply-To: <20201130160327.ov32m4rapk4h432a@linutronix.de> References: <15171df044b167351e7f6a688aabd71bade9ae2a.camel@gmx.de> <79ee43026efe5aaa560953ea8fe29a826ac4e855.camel@gmx.de> <20201129112922.db53kmtpu76xxukj@spock.localdomain> <90c4857c53b657147bfb71a281ece9839b0373c2.camel@gmx.de> <20201130132014.mlvxeyiub3fpwyw7@linutronix.de> <856b5cc2a3d4eb673743b52956bf1e60dcdf87a1.camel@gmx.de> <20201130145229.mhbkrfuvyctniaxi@linutronix.de> <05121515e73891ceb9e5caf64b6111fc8ff43fab.camel@gmx.de> <20201130160327.ov32m4rapk4h432a@linutronix.de> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.4 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:WHhCmV7H4GPew09tvTHmBnfaIWrnHFSbzOsPB0lILlwf3Jfpx1r ocXOPwkliheZ8aw5NcPkvOMVbLmTkuY76gQ+V/yObwxT6eCCPSY3CZ8cOcZZ+eL3yGvKu0g 1emKxA3izcLeeu/+18kCgu8MqQzhejmonMOOO/PkYYXjjR5gfe83hfFN/+XiaHrTBjqHrEp DWj/nzVhwS1sfRq8G7HCQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:vDsTuF1V16c=:qw+O0BalqIzFaPuITU06gb yjDxB+Ac2G7zYpuqm46uBDQwtN2glSWtQWeUBG2FU3nDHxLBRyQPM5kGSGHU+/IDeSd4BYTvH ufmQcUu7Sl2hDA5102IPAnzb5hNRY7dut6L/oUTdpaBsdf0WPth04XDuOb7aygIMbZRk0kbBx K9c7KWt8ksFLwq4PGUbSZCqNC/EnHndOtpLoQ7SQbRKwd76MdqevaUaMwOcgtFRPY5lLeItZt 6UxYujwOjOEajJU7ngMeA8dgXxc/sw+09m5Zfpru9jz7hr7L7PkXeLu6wWHUpId2GSvwwKUYc EKsSDPEsH80myjkStNA75h+TFM84vFXs27c5y5AOh7uWIIPoNSgkNscTnYCe3QjvgeN/0GAUG 1WqtJ+EmelcRTmvRkwVo17bTEgKBHk40j+0OL2vXnAXYlMWO06T3sTE54oVp7OE4ayWj6cdAO urmcxHiUK6RCw3Ia5Z1dG6EfCLgN7v1X9rqZqN13nBRDomRtyEIBh14dfLIJ8yWD0pBm9gCbk J7j7SowppVAFD9CUaPCVHax9B+S8OHfTs+A6fYlPC8dGkxeD9mgjyVE35dXUylrvTdJfoHj7K H8kJqOvOUDC7wjX+yYf5f8T0R1eUG9DoSyna4gEYd/fPW/LCqvrS5EI+th8A4Fk3PB7420i8Q 56eZ6TxmRp8wTweKgMJwXNV7xzocHp2HDqFWZSC5Zz8b1CJGVR1ml+AoDd/i+/nF/o+yhYAe0 2DHXrlFXXVnZOnn72CmJD0w4vIIu2zGpcG/QHHi1Ho+a33F+0XTzk7De2XvyZ71hAV6oSruBw XwwvkADrkMOtKM3nhhmm38UCIGnahySGXKB9VZrpUqdubWOveNAlT/h2ojLkUpedyl9gGelHZ 2vMjAMS4aJFvOQHi4VnQ== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2020-11-30 at 17:03 +0100, Sebastian Andrzej Siewior wrote: > On 2020-11-30 16:01:11 [+0100], Mike Galbraith wrote: > > On Mon, 2020-11-30 at 15:52 +0100, Sebastian Andrzej Siewior wrote: > > > How do you test this? I triggered a few oom-killer and I have here g= it > > > gc running for a few hours now=E2=80=A6 Everything is fine. > > > > In an LTP install, ./runltp -f mm. Shortly after box starts swapping > > insanely, it explodes quite reliably here with either z3fold or > > zsmalloc.. but not with zbud. > > This just passed. It however killed my git-gc task which wasn't done. > Let me try tomorrow with your config. FYI, I tried 5.9-rt (after fixing 5.9.11), it exploded in the same way, so (as expected) it's not some devel tree oopsie. -Mike 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=-0.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 57952C63777 for ; Mon, 30 Nov 2020 16:27:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B6F36206E3 for ; Mon, 30 Nov 2020 16:27:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="cb8lgFKs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6F36206E3 Authentication-Results: mail.kernel.org; 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Mon, 30 Nov 2020 16:27:50 +0000 (UTC) X-HE-Tag: earth74_0606d2b273a3 X-Filterd-Recvd-Size: 4226 Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Mon, 30 Nov 2020 16:27:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1606753639; bh=g7gIuzXdJkNWVgDL+psau+dbSeSo+v1g6CMrN/YRsHc=; h=X-UI-Sender-Class:Subject:From:To:Cc:Date:In-Reply-To:References; b=cb8lgFKsWvlHg9BxwLAsvwUNmGGb7b/UPHsZB9g3WOSf7FL7epADsDhM6gv8/BayY /mk/w09tpYqvjbdsHVQRr7lCCy60MduiNGyC5nstJGRHX9zYBX0CPjeByB0rscfx0R XSCzGn/eiRuvMJh8fYTd4Ws7o07NRkLfc9y5+S7Q= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from homer.fritz.box ([185.221.151.20]) by mail.gmx.com (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M3lY1-1kk38O0J2x-000tvU; Mon, 30 Nov 2020 17:27:19 +0100 Message-ID: <2658a2a26e53826687cd7b22f424e2d3319423dd.camel@gmx.de> Subject: Re: scheduling while atomic in z3fold From: Mike Galbraith To: Sebastian Andrzej Siewior Cc: Oleksandr Natalenko , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Steven Rostedt , Thomas Gleixner , linux-rt-users@vger.kernel.org Date: Mon, 30 Nov 2020 17:27:17 +0100 In-Reply-To: <20201130160327.ov32m4rapk4h432a@linutronix.de> References: <15171df044b167351e7f6a688aabd71bade9ae2a.camel@gmx.de> <79ee43026efe5aaa560953ea8fe29a826ac4e855.camel@gmx.de> <20201129112922.db53kmtpu76xxukj@spock.localdomain> <90c4857c53b657147bfb71a281ece9839b0373c2.camel@gmx.de> <20201130132014.mlvxeyiub3fpwyw7@linutronix.de> <856b5cc2a3d4eb673743b52956bf1e60dcdf87a1.camel@gmx.de> <20201130145229.mhbkrfuvyctniaxi@linutronix.de> <05121515e73891ceb9e5caf64b6111fc8ff43fab.camel@gmx.de> <20201130160327.ov32m4rapk4h432a@linutronix.de> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.4 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:WHhCmV7H4GPew09tvTHmBnfaIWrnHFSbzOsPB0lILlwf3Jfpx1r ocXOPwkliheZ8aw5NcPkvOMVbLmTkuY76gQ+V/yObwxT6eCCPSY3CZ8cOcZZ+eL3yGvKu0g 1emKxA3izcLeeu/+18kCgu8MqQzhejmonMOOO/PkYYXjjR5gfe83hfFN/+XiaHrTBjqHrEp DWj/nzVhwS1sfRq8G7HCQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:vDsTuF1V16c=:qw+O0BalqIzFaPuITU06gb yjDxB+Ac2G7zYpuqm46uBDQwtN2glSWtQWeUBG2FU3nDHxLBRyQPM5kGSGHU+/IDeSd4BYTvH ufmQcUu7Sl2hDA5102IPAnzb5hNRY7dut6L/oUTdpaBsdf0WPth04XDuOb7aygIMbZRk0kbBx K9c7KWt8ksFLwq4PGUbSZCqNC/EnHndOtpLoQ7SQbRKwd76MdqevaUaMwOcgtFRPY5lLeItZt 6UxYujwOjOEajJU7ngMeA8dgXxc/sw+09m5Zfpru9jz7hr7L7PkXeLu6wWHUpId2GSvwwKUYc EKsSDPEsH80myjkStNA75h+TFM84vFXs27c5y5AOh7uWIIPoNSgkNscTnYCe3QjvgeN/0GAUG 1WqtJ+EmelcRTmvRkwVo17bTEgKBHk40j+0OL2vXnAXYlMWO06T3sTE54oVp7OE4ayWj6cdAO urmcxHiUK6RCw3Ia5Z1dG6EfCLgN7v1X9rqZqN13nBRDomRtyEIBh14dfLIJ8yWD0pBm9gCbk J7j7SowppVAFD9CUaPCVHax9B+S8OHfTs+A6fYlPC8dGkxeD9mgjyVE35dXUylrvTdJfoHj7K H8kJqOvOUDC7wjX+yYf5f8T0R1eUG9DoSyna4gEYd/fPW/LCqvrS5EI+th8A4Fk3PB7420i8Q 56eZ6TxmRp8wTweKgMJwXNV7xzocHp2HDqFWZSC5Zz8b1CJGVR1ml+AoDd/i+/nF/o+yhYAe0 2DHXrlFXXVnZOnn72CmJD0w4vIIu2zGpcG/QHHi1Ho+a33F+0XTzk7De2XvyZ71hAV6oSruBw XwwvkADrkMOtKM3nhhmm38UCIGnahySGXKB9VZrpUqdubWOveNAlT/h2ojLkUpedyl9gGelHZ 2vMjAMS4aJFvOQHi4VnQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.015702, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 2020-11-30 at 17:03 +0100, Sebastian Andrzej Siewior wrote: > On 2020-11-30 16:01:11 [+0100], Mike Galbraith wrote: > > On Mon, 2020-11-30 at 15:52 +0100, Sebastian Andrzej Siewior wrote: > > > How do you test this? I triggered a few oom-killer and I have here g= it > > > gc running for a few hours now=E2=80=A6 Everything is fine. > > > > In an LTP install, ./runltp -f mm. Shortly after box starts swapping > > insanely, it explodes quite reliably here with either z3fold or > > zsmalloc.. but not with zbud. > > This just passed. It however killed my git-gc task which wasn't done. > Let me try tomorrow with your config. FYI, I tried 5.9-rt (after fixing 5.9.11), it exploded in the same way, so (as expected) it's not some devel tree oopsie. -Mike