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=-13.1 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1, USER_IN_DEF_DKIM_WL autolearn=unavailable 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 82EF3C433E2 for ; Wed, 24 Jun 2020 20:00:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6490220768 for ; Wed, 24 Jun 2020 20:00:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="uhBYvvKC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391405AbgFXUAJ (ORCPT ); Wed, 24 Jun 2020 16:00:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45390 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391221AbgFXUAI (ORCPT ); Wed, 24 Jun 2020 16:00:08 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C423BC0613ED for ; Wed, 24 Jun 2020 13:00:06 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id q17so1676841pfu.8 for ; Wed, 24 Jun 2020 13:00:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=IeM1pbX3Y/QRt8rMyrroNyrQ/gTGnkJwEnogm0dQ3GE=; b=uhBYvvKCWelTf4JenS6hYiSwgyGKBjl7XAHO+DuYLiRrdYNH1hh8a647W7MkpRc4W3 grtXLTOUfUT9eg5QiRa1Fb/bpa4JxRgaR1568VZ3Rp4Tzrkb68F99ewBKwLJE2svnato wIDa9TNmSIMZXHndufHSFI3KeZwRR31Pat1P9Ww2YAe/Blsh7+N+pV1a1TQjce7oLPl+ L9IhY2vdG5I9KUW4iS96MKRWm8TQzhkjib3ioZR2aREcTFKbAucF0gsWUdHcOivUMgTR hZV33HumrWYCIH4FW+6RBsVHhBxSKuITT9/LtRDQYcJXRJ3TafqePblA72wzwovefbeN YUow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=IeM1pbX3Y/QRt8rMyrroNyrQ/gTGnkJwEnogm0dQ3GE=; b=msXBUmx21kWY8CbQAxXovxGuzg/IjLN0ka0mnGBkrO64roADLC4/DzrOyVoeS8RHEj jLpgCAg+QCHWSQ9NC4cOsAFXuaVpy/pzwv2NrRBG1vFp5XU9rA+0k6Vtm5o0pp/6sFmX WulwVC1+AAe5nkjluncBZLpMyOT+qc2NucPl3k9XaduUpun1Kz7K2hcg3Xi0V88UdW8n s9QxEuvJeToxVrMN0pBhnuzulF8vxNptZxow519VL+MmQBWrqBs5FHSXKD3gOqii+TRu ZEU2qpXUpqcj/gM1DP0e3kDMk1fAEGhd/LY2s46C6TzMYd3/eRLPwlqOvH/qinlpSBi0 qR+g== X-Gm-Message-State: AOAM533XqbqkSmSqLx4k715G41Z/BgcGxE8WeJt4nB722120GIbV/tKa n91BuqVxhhW2aQcF8tol2piq1w== X-Google-Smtp-Source: ABdhPJwi+ep/yhnadV35mqvrBbBtsDSgiibwsNhPmy0Eh7KnXNpc3Qxvv8zxkmDoRNCdHSdO5Af54A== X-Received: by 2002:aa7:924c:: with SMTP id 12mr30224767pfp.225.1593028805959; Wed, 24 Jun 2020 13:00:05 -0700 (PDT) Received: from [2620:15c:17:3:3a5:23a7:5e32:4598] ([2620:15c:17:3:3a5:23a7:5e32:4598]) by smtp.gmail.com with ESMTPSA id h30sm3090949pfr.89.2020.06.24.13.00.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jun 2020 13:00:05 -0700 (PDT) Date: Wed, 24 Jun 2020 13:00:04 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Minchan Kim cc: Andrew Morton , LKML , Christian Brauner , linux-mm , linux-api@vger.kernel.org, oleksandr@redhat.com, Suren Baghdasaryan , Tim Murray , Sandeep Patil , Sonny Rao , Brian Geffon , Michal Hocko , Johannes Weiner , Shakeel Butt , John Dias , Joel Fernandes , Jann Horn , alexander.h.duyck@linux.intel.com, sj38.park@gmail.com, Arjun Roy , Vlastimil Babka , Christian Brauner , Daniel Colascione , Jens Axboe , Kirill Tkhai , SeongJae Park , linux-man@vger.kernel.org Subject: Re: [PATCH v8 4/4] mm/madvise: check fatal signal pending of target process In-Reply-To: <20200622192900.22757-5-minchan@kernel.org> Message-ID: References: <20200622192900.22757-1-minchan@kernel.org> <20200622192900.22757-5-minchan@kernel.org> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 22 Jun 2020, Minchan Kim wrote: > Bail out to prevent unnecessary CPU overhead if target process has pending > fatal signal during (MADV_COLD|MADV_PAGEOUT) operation. > > Link: http://lkml.kernel.org/r/20200302193630.68771-4-minchan@kernel.org > Signed-off-by: Minchan Kim > Reviewed-by: Suren Baghdasaryan > Reviewed-by: Vlastimil Babka > Cc: Alexander Duyck > Cc: Brian Geffon > Cc: Christian Brauner > Cc: Daniel Colascione > Cc: Jann Horn > Cc: Jens Axboe > Cc: Joel Fernandes > Cc: Johannes Weiner > Cc: John Dias > Cc: Kirill Tkhai > Cc: Michal Hocko > Cc: Oleksandr Natalenko > Cc: Sandeep Patil > Cc: SeongJae Park > Cc: SeongJae Park > Cc: Shakeel Butt > Cc: Sonny Rao > Cc: Tim Murray > Cc: Christian Brauner > Cc: Acked-by: David Rientjes 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=-13.1 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1, USER_IN_DEF_DKIM_WL autolearn=unavailable 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 6806DC433E1 for ; Wed, 24 Jun 2020 20:00:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2D11E20768 for ; Wed, 24 Jun 2020 20:00:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="uhBYvvKC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D11E20768 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A72936B0002; Wed, 24 Jun 2020 16:00:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A2D566B0008; Wed, 24 Jun 2020 16:00:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8E9E36B000A; Wed, 24 Jun 2020 16:00:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0182.hostedemail.com [216.40.44.182]) by kanga.kvack.org (Postfix) with ESMTP id 7813A6B0002 for ; Wed, 24 Jun 2020 16:00:08 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 01F472DFC for ; Wed, 24 Jun 2020 20:00:08 +0000 (UTC) X-FDA: 76965171696.10.stew75_4a0253026e46 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin10.hostedemail.com (Postfix) with ESMTP id B4CF916A4BA for ; Wed, 24 Jun 2020 20:00:07 +0000 (UTC) X-HE-Tag: stew75_4a0253026e46 X-Filterd-Recvd-Size: 5329 Received: from mail-pf1-f194.google.com (mail-pf1-f194.google.com [209.85.210.194]) by imf26.hostedemail.com (Postfix) with ESMTP for ; Wed, 24 Jun 2020 20:00:07 +0000 (UTC) Received: by mail-pf1-f194.google.com with SMTP id p11so1669535pff.11 for ; Wed, 24 Jun 2020 13:00:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=IeM1pbX3Y/QRt8rMyrroNyrQ/gTGnkJwEnogm0dQ3GE=; b=uhBYvvKCWelTf4JenS6hYiSwgyGKBjl7XAHO+DuYLiRrdYNH1hh8a647W7MkpRc4W3 grtXLTOUfUT9eg5QiRa1Fb/bpa4JxRgaR1568VZ3Rp4Tzrkb68F99ewBKwLJE2svnato wIDa9TNmSIMZXHndufHSFI3KeZwRR31Pat1P9Ww2YAe/Blsh7+N+pV1a1TQjce7oLPl+ L9IhY2vdG5I9KUW4iS96MKRWm8TQzhkjib3ioZR2aREcTFKbAucF0gsWUdHcOivUMgTR hZV33HumrWYCIH4FW+6RBsVHhBxSKuITT9/LtRDQYcJXRJ3TafqePblA72wzwovefbeN YUow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=IeM1pbX3Y/QRt8rMyrroNyrQ/gTGnkJwEnogm0dQ3GE=; b=EGR/67a7QFiLOF4aj+oPa8avrkh7LWvWhyKdb5mf2avUJqfe3Kz7Ov7ue4OSR1O72g d3kT6gT5cUwAfTTgscKkyRR7uY4XhXgkuZkA7giVvApkYqDf9zQ5Sb0YCvowAL6W4Jyl AHHxrFD0r11MrRLdAeI3+ranXIo2rb5MCGU/9xzVRWPt8IGwkvq4TI9ng5sx7BuA93J2 3/p9MKJ8zVtjuTRQyDecQcQ1/SxWPaB2ieciVNnS7RpFgQgBmVp6YGNwf0KFdcq7Kyu9 7NlNEtRTXbxGkOmzP/TL2caMzYDhS8LPnI5CTuGUYqZvws6d7jiGGmbuDUXdrdTPKXJO RoWA== X-Gm-Message-State: AOAM533wlZMgJ0jszRJZfPBE+L7zvXIOFAApIJu8Y5Cz/FYDF7Y+/VU7 /NRIm4XzU4C3k34Ooo3IosQOWQ== X-Google-Smtp-Source: ABdhPJwi+ep/yhnadV35mqvrBbBtsDSgiibwsNhPmy0Eh7KnXNpc3Qxvv8zxkmDoRNCdHSdO5Af54A== X-Received: by 2002:aa7:924c:: with SMTP id 12mr30224767pfp.225.1593028805959; Wed, 24 Jun 2020 13:00:05 -0700 (PDT) Received: from [2620:15c:17:3:3a5:23a7:5e32:4598] ([2620:15c:17:3:3a5:23a7:5e32:4598]) by smtp.gmail.com with ESMTPSA id h30sm3090949pfr.89.2020.06.24.13.00.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jun 2020 13:00:05 -0700 (PDT) Date: Wed, 24 Jun 2020 13:00:04 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Minchan Kim cc: Andrew Morton , LKML , Christian Brauner , linux-mm , linux-api@vger.kernel.org, oleksandr@redhat.com, Suren Baghdasaryan , Tim Murray , Sandeep Patil , Sonny Rao , Brian Geffon , Michal Hocko , Johannes Weiner , Shakeel Butt , John Dias , Joel Fernandes , Jann Horn , alexander.h.duyck@linux.intel.com, sj38.park@gmail.com, Arjun Roy , Vlastimil Babka , Christian Brauner , Daniel Colascione , Jens Axboe , Kirill Tkhai , SeongJae Park , linux-man@vger.kernel.org Subject: Re: [PATCH v8 4/4] mm/madvise: check fatal signal pending of target process In-Reply-To: <20200622192900.22757-5-minchan@kernel.org> Message-ID: References: <20200622192900.22757-1-minchan@kernel.org> <20200622192900.22757-5-minchan@kernel.org> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: B4CF916A4BA X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 22 Jun 2020, Minchan Kim wrote: > Bail out to prevent unnecessary CPU overhead if target process has pending > fatal signal during (MADV_COLD|MADV_PAGEOUT) operation. > > Link: http://lkml.kernel.org/r/20200302193630.68771-4-minchan@kernel.org > Signed-off-by: Minchan Kim > Reviewed-by: Suren Baghdasaryan > Reviewed-by: Vlastimil Babka > Cc: Alexander Duyck > Cc: Brian Geffon > Cc: Christian Brauner > Cc: Daniel Colascione > Cc: Jann Horn > Cc: Jens Axboe > Cc: Joel Fernandes > Cc: Johannes Weiner > Cc: John Dias > Cc: Kirill Tkhai > Cc: Michal Hocko > Cc: Oleksandr Natalenko > Cc: Sandeep Patil > Cc: SeongJae Park > Cc: SeongJae Park > Cc: Shakeel Butt > Cc: Sonny Rao > Cc: Tim Murray > Cc: Christian Brauner > Cc: Acked-by: David Rientjes