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[195.135.220.15]) by mx.google.com with ESMTPS id r11si8704560eju.317.2019.07.15.06.17.35 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Jul 2019 06:17:35 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning mhocko@kernel.org does not designate 195.135.220.15 as permitted sender) smtp.mailfrom=mhocko@kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0CA51AF7E; Mon, 15 Jul 2019 13:17:34 +0000 (UTC) Date: Mon, 15 Jul 2019 15:17:32 +0200 From: Michal Hocko To: Yang Shi Cc: dvyukov@google.com, catalin.marinas@arm.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: page_alloc: document kmemleak's non-blockable __GFP_NOFAIL case Message-ID: <20190715131732.GX29483@dhcp22.suse.cz> References: <1562964544-59519-1-git-send-email-yang.shi@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1562964544-59519-1-git-send-email-yang.shi@linux.alibaba.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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 Sat 13-07-19 04:49:04, Yang Shi wrote: > When running ltp's oom test with kmemleak enabled, the below warning was > triggerred since kernel detects __GFP_NOFAIL & ~__GFP_DIRECT_RECLAIM is > passed in: kmemleak is broken and this is a long term issue. I thought that Catalin had something to address this. While this patch only adds a comment and discourages future changes of the warning which is fine and probably something that we should do, kmemleak really should be fixed sooner than later. -- Michal Hocko SUSE Labs