From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by kanga.kvack.org (Postfix) with ESMTP id DC65B6B7734 for ; Thu, 6 Sep 2018 01:54:00 -0400 (EDT) Received: by mail-pl1-f200.google.com with SMTP id bh1-v6so5033502plb.15 for ; Wed, 05 Sep 2018 22:54:00 -0700 (PDT) Received: from www262.sakura.ne.jp (www262.sakura.ne.jp. [202.181.97.72]) by mx.google.com with ESMTPS id w66-v6si4619617pfi.88.2018.09.05.22.53.59 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Sep 2018 22:53:59 -0700 (PDT) Message-Id: <201809060553.w865rmpj036017@www262.sakura.ne.jp> Subject: Re: INFO: task hung in =?ISO-2022-JP?B?ZXh0NF9kYV9nZXRfYmxvY2tfcHJlcA==?= From: Tetsuo Handa MIME-Version: 1.0 Date: Thu, 06 Sep 2018 14:53:48 +0900 References: <0252ad5d-46e6-0d7f-ef91-4e316657a83d@i-love.sakura.ne.jp> In-Reply-To: Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dmitry Vyukov Cc: syzbot , 'Dmitry Vyukov' via syzkaller-upstream-moderation , linux-mm , Michal Hocko Dmitry Vyukov wrote: > > Also, another notable thing is that the backtrace for some reason includes > > > > [ 1048.211540] ? oom_killer_disable+0x3a0/0x3a0 > > > > line. Was syzbot testing process freezing functionality? > > What's the API for this? > I'm not a user of suspend/hibernation. But it seems that usage of the API is to write one of words listed in /sys/power/state into /sys/power/state . # echo suspend > /sys/power/state