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[209.132.180.67]) by mx.google.com with ESMTP id g18si2862884pgk.477.2019.07.03.10.46.37; Wed, 03 Jul 2019 10:46:52 -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; dkim=pass header.i=@google.com header.s=20161025 header.b=VGm4cgty; 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=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726881AbfGCRox (ORCPT + 99 others); Wed, 3 Jul 2019 13:44:53 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:45034 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726621AbfGCRow (ORCPT ); Wed, 3 Jul 2019 13:44:52 -0400 Received: by mail-pg1-f193.google.com with SMTP id i18so1588485pgl.11 for ; Wed, 03 Jul 2019 10:44:52 -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=E+nIXNVtybGCJQ9qhR+v7ySrKVmdYkqu+JpBB3XRK44=; b=VGm4cgtyuTX82jA5Q7OkqzviUC7ZS3E1fwHKamsDm+UAbbNRF67b8ZYcwOoKfx6UvT yD5jrQPVE8fBsT1+7vjAyGEBXYa708NL3AAHTpXQubo0l2bhrBSZ871MN0nZ/AJiwdd8 xrfc7Y7NXHqF0sXfiwb+/eqvImMniB0H6K3E6+fFwnJ7JwlfEe20OqqGToK5uwTXqNq/ 4pye2K9cVhUqpj6h3YTAUMB9h4p5cICiXBCmdrbIp416i+hvmLHO+Baviv4uDez5FViF v9o1XoL+AFUzvC8K+LVa3P09MOhAkKLAup6cLLiTT5fr0x9vDqitwp12MaBNuyZM4TFU CSew== 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=E+nIXNVtybGCJQ9qhR+v7ySrKVmdYkqu+JpBB3XRK44=; b=PJS2NPICb9o2xP2wc1QUTvtsnTF9VO81BXi7lFOa567Y9KK1VbsJTsDcJqIJzdkd4z duyjoKcUru1kA8VNW2ve9BUzucBQhXrUkYf/CuM9J1twUZA3wnBTCtYl/hclJSTU6ScF 6CscusTwlEwO5W5hF6shEN+cHRzI7YU5AYexEp0af0YbqzuTouhbd62GEx9Cl28Rvi5K 2vs+DMB4Gu3dJRU3T7IIkrhR8ncWlfvoy+MBo7gkb2Qy9hNsolg+AJJ1zJ/QngCrQ2UQ L9Bn+dDNCVWS4Rtv8SMmsd/wzYCrTrWEHlCQbmHzZRO0lywWE7bRGNXyiF3Q5n0EuhRD KmVA== X-Gm-Message-State: APjAAAXTEzkhUIzkmWAZjzdnpE0jU0CgKUZnT2aJtgR1z0wUdydnrBtB c3gPWWgIhoLf7UIrF5tpc3LpxQ== X-Received: by 2002:a63:6286:: with SMTP id w128mr29708938pgb.12.1562175891115; Wed, 03 Jul 2019 10:44:51 -0700 (PDT) Received: from [100.112.64.100] ([104.133.8.100]) by smtp.gmail.com with ESMTPSA id y68sm3021050pfy.164.2019.07.03.10.44.49 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 03 Jul 2019 10:44:50 -0700 (PDT) Date: Wed, 3 Jul 2019 10:44:30 -0700 (PDT) From: Hugh Dickins X-X-Sender: hugh@eggly.anvils To: Oleg Nesterov cc: Andrew Morton , 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() In-Reply-To: <20190703173546.GB21672@redhat.com> Message-ID: 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> <20190703173546.GB21672@redhat.com> User-Agent: Alpine 2.11 (LSU 23 2013-08-11) 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 Wed, 3 Jul 2019, Oleg Nesterov wrote: > 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. Thank you, Oleg. But, with respect, I'd caution against making it cleverer at the last minute: what you posted already is understandable, works, has Jen's Reviewed-by and my Acked-by: it just lacks a description and signoff. Hugh