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 83846C64E7B for ; Mon, 30 Nov 2020 16:56:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 135A820706 for ; Mon, 30 Nov 2020 16:56:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="axy+r6bP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728989AbgK3Q4K (ORCPT ); Mon, 30 Nov 2020 11:56:10 -0500 Received: from mout.gmx.net ([212.227.15.18]:53959 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728148AbgK3Q4K (ORCPT ); Mon, 30 Nov 2020 11:56:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1606755237; bh=aLmIcVpQyq4A09c6acl7nMq3DkN2oex3ynveIly10dY=; h=X-UI-Sender-Class:Subject:From:To:Cc:Date:In-Reply-To:References; b=axy+r6bP7rJUiQafduNXCwNKD0fXjhjbHwW+gcIBtBOog+kTWooenD2HSPwKTtS6h a8GnIf5iQKwTGD2g/FhCmTy0rbhPpaXuE2SOa2HIpMuGngOk6qGcRKkfegNNEERpb7 1RqZnseClh90OQthOeTcXVSerENPQZhnFEi6UIao= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from homer.fritz.box ([185.221.151.20]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MYNJg-1kfypL2Bow-00VRLB; Mon, 30 Nov 2020 17:53:57 +0100 Message-ID: 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 17:53:56 +0100 In-Reply-To: <2658a2a26e53826687cd7b22f424e2d3319423dd.camel@gmx.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> <2658a2a26e53826687cd7b22f424e2d3319423dd.camel@gmx.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:Ye6oh4sYteHp7jCH6ukf5CTv9Lo0c9RMuT9g9rtdV7dJNmxvMtU hPzVtx2cVk/N0+1hIdKLpCJ9AKeu9w6+MGcQQJCxrm6uYSTCRdB9TrMjxxOkbJCpWPcXf6Z eHqztkbxkr6b0RY+NjjPN7e+4tiCswdaYoNUcDLwuuN93oupAb2r28oIYhmBFA23Cl8YSQj 2u6q7ZXi3gapqMKUit7jg== X-UI-Out-Filterresults: notjunk:1;V03:K0:dRDzPF7e0Kg=:aA+ZRFGh+PkJFiS6IKqm+u fCLKf0T7HbfZNKecYkrbNSIpbQPVYsQw61mJ3H679Tiy1p+acB3SPSzSGg2ni478gLewPqtA6 xxWASBV2f5slJyVW3/2LA9y9/IuXVLyELH5HGFryFB4DM+ZuthA1D9qxsQdZwUCMq8pWOaxCH Qncs8wZpWYDIrH6MgLzqbcW8IBn7YTfuq4134hsTqhVQWEWGK1ImRUQJWf3S7j9cUori2MEBP IGNryThn+q3ZZrYUJW2QdYT3h0o3Myv7S5yuHWAKO2CQU31wj7DnMgL8jU/En5jQvfSXoNpD3 B5vTqrsqB7+5qAfCabApLxG7vBrAT9pwa4DSh58kYqKfCoKxxdxFvZmGEJFVkPPIAxI4Z5MbD jIRR8hSdPt1d0NwXU2MYOiiReMzSTmL64giG6UqYkBAGMt72xUh2gTNNdjgC0rxhiqOM8LDWf 4ZMQOZvshjfCdl/iOkevoOpuTrv9GMbyabvzinO8CDWtDXqFLqL/BvUhesJpeOxgKm3Kyy5VL W3NOGfKd3S+sK3mwBlFs3o3Kpil/DAmZzqUcAbtjiPUjgvkb13S85Y9k1w57jaSTpefRebUsX wcLx20fF9jCA2huEMOFuQtyqw24b/kFch0EeiuH0E++xP+8Vjb+fXanvFon5q5GEB0XyUHP8i 3AQejEK46h5SQErqdCOPaT64Fecal9BDYOA50Sy8QajEsw5FbAAM3i1rSUZ4R8Jk1Xl/RBJa+ xaqt+Z5MvGf8MewGeDNRIZRANFgyovMiFbBTupETft1w+J9MeGtX0s7gY2BQV6R1dHOfSUyJS cniQuHirMoWUUXN4YMffgA7hXKkE9opi+sxmECJ2WCQY/nqgt7iIAW2+vEaDgNyCtlW+G4GpF mDcHwQ2+dzHZiZXMMLtQ== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2020-11-30 at 17:27 +0100, Mike Galbraith wrote: > 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= git > > > > gc running for a few hours now=E2=80=A6 Everything is fine. > > > > > > In an LTP install, ./runltp -f mm. Shortly after box starts swappin= g > > > 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. It reproduces in full distro KVM too. -Mike