From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f41.google.com (mail-oi0-f41.google.com [209.85.218.41]) by kanga.kvack.org (Postfix) with ESMTP id 8E1FD6B0038 for ; Thu, 26 Nov 2015 06:33:52 -0500 (EST) Received: by oiww189 with SMTP id w189so45548864oiw.3 for ; Thu, 26 Nov 2015 03:33:52 -0800 (PST) Received: from www262.sakura.ne.jp (www262.sakura.ne.jp. [2001:e42:101:1:202:181:97:72]) by mx.google.com with ESMTPS id rk8si8064857oeb.17.2015.11.26.03.33.51 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 26 Nov 2015 03:33:51 -0800 (PST) Subject: Re: WARNING in handle_mm_fault From: Tetsuo Handa References: <201511260027.CCC26590.SOHFMQLVJOtFOF@I-love.SAKURA.ne.jp> <20151125173730.GS27283@dhcp22.suse.cz> In-Reply-To: Message-Id: <201511262033.EAB48965.FVJOOOMLFHStFQ@I-love.SAKURA.ne.jp> Date: Thu, 26 Nov 2015 20:33:05 +0900 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org List-ID: To: dvyukov@google.com, syzkaller@googlegroups.com Cc: hannes@cmpxchg.org, cgroups@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, kcc@google.com, glider@google.com, sasha.levin@oracle.com, edumazet@google.com, gthelen@google.com, tj@kernel.org, peterz@infradead.org Dmitry Vyukov wrote: > On Wed, Nov 25, 2015 at 6:37 PM, Michal Hocko wrote: > > On Wed 25-11-15 18:21:02, Dmitry Vyukov wrote: > > [...] > >> I have some progress. > > > > Please have a look at Peter's patch posted in the original email thread > > http://lkml.kernel.org/r/20151125150207.GM11639@twins.programming.kicks-ass.net > > Yes, I've posted there as well. That patch should help. > OK. This bug seems to exist since commit ca94c442535a "sched: Introduce SCHED_RESET_ON_FORK scheduling policy flag". Should Cc: [2.6.32+] line be added? By the way, does use of "unsigned char" than "unsigned" save some bytes? Simply trying not to change the size of "struct task_struct"... According to C99, only "unsigned int", "signed int" and "_Bool" are allowed. But many compilers accept other types such as "unsigned char", given that we watch out for compiler bugs. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org