Received: by 2002:a25:ad19:0:0:0:0:0 with SMTP id y25csp1166037ybi; Wed, 3 Jul 2019 10:37:08 -0700 (PDT) X-Google-Smtp-Source: APXvYqzGiYJpl6rIUcKN3cX+2Ia1OLGOpumJrUsRvber5X1xKjxINFFrwsIwt93AFGPJEfcev4UI X-Received: by 2002:a17:902:a03:: with SMTP id 3mr43239391plo.302.1562175428210; Wed, 03 Jul 2019 10:37:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1562175428; cv=none; d=google.com; s=arc-20160816; b=n70WwXRhSFrQY57IHHPxOuUWW42EcB6+5qwoGmjn0AGeaRfWflMX2by2BldozJl5Rm 19/CEcFVu/DhpSUgrZBXXil9IzUoQxVEOLD9bOG0YRaJALJd2jhG0STCivkc7jaG82AO tgR4SBM0aW53NaEmCywdU7NuZ/77jYPz8aV1BFPM7wdMGvUTb3VPg+ANjw+sCi5shNUf 1Y46PLDdLW4Bh7OZkuzyGjPm1J5OugPvcSieEVyDn1lKjZbyDXIs9ckhMViJ0AWn9dRn raIp1h/2MuYo4BBe4K/rkYDNvgpj6IfycHYvh10k/AOaSRtqrD1PL+mSHt4/3iE0XpSu ACSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=v3o2J2mBzvZ4QH8AbUS/eqHi+Nl0ZZgQOQwAS1EfJp4=; b=Q4tsvikkuB4o1kCci8FyPh38RBpK57kvVpDhsgEDe4Uik0ACjvwVP6royrMyJ05Ymk jEw47AEgRzqzR45dp7fejdeqLC2Lul1M8ACg69z/mV/yZgXpYSoqwR0z+1vOLpu/Z2P7 k83dtt4ZSOn34BExne+GRh/IcSMvSRu5HfyfokYoXr7gTn+xd0o2DACjTRn0ksFmVjpT j6ydYmb1KEaK8goLL1ba51GsZokvO96KHwfg9Fx/ggv0LKZM2pywUq44lWU/KHb5YXvl mnStkwIVq4hamw8dCgBSJedxFJ5pemr4XS7yGJxgiGNE4x+ew2hM0/OLVkex0HvdfmoS FB9w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id m45si2528462pje.39.2019.07.03.10.36.51; Wed, 03 Jul 2019 10:37:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727028AbfGCRgH (ORCPT + 99 others); Wed, 3 Jul 2019 13:36:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35000 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726574AbfGCRgH (ORCPT ); Wed, 3 Jul 2019 13:36:07 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 838887FDCA; Wed, 3 Jul 2019 17:35:52 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.43.17.136]) by smtp.corp.redhat.com (Postfix) with SMTP id 8F1EC1001B35; Wed, 3 Jul 2019 17:35:47 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Wed, 3 Jul 2019 19:35:52 +0200 (CEST) Date: Wed, 3 Jul 2019 19:35:47 +0200 From: Oleg Nesterov To: Andrew Morton Cc: Jens Axboe , Hugh Dickins , Peter Zijlstra , Qian Cai , hch@lst.de, gkohli@codeaurora.org, mingo@redhat.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] block: fix a crash in do_task_dead() Message-ID: <20190703173546.GB21672@redhat.com> References: <1559161526-618-1-git-send-email-cai@lca.pw> <20190530080358.GG2623@hirez.programming.kicks-ass.net> <82e88482-1b53-9423-baad-484312957e48@kernel.dk> <20190603123705.GB3419@hirez.programming.kicks-ass.net> <97d2f5cc-fe98-f28e-86ce-6fbdeb8b67bd@kernel.dk> <20190702150615.1dfbbc2345c1c8f4d2a235c0@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190702150615.1dfbbc2345c1c8f4d2a235c0@linux-foundation.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Wed, 03 Jul 2019 17:36:07 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/02, Andrew Morton wrote: > On Mon, 1 Jul 2019 08:22:32 -0600 Jens Axboe wrote: > > > Andrew, can you queue Oleg's patch for 5.2? You can also add my: > > > > Reviewed-by: Jens Axboe > > Sure. Although things are a bit of a mess. Oleg, can we please have a > clean resend with signoffs and acks, etc? OK, will do tomorrow. This cleanup can be improved, we can avoid get/put_task_struct altogether, but need to recheck. Oleg.