From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F8A3C433E4 for ; Fri, 24 Jul 2020 02:50:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2373A20737 for ; Fri, 24 Jul 2020 02:50:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="J9LYxuQT" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2373A20737 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A03F56B002A; Thu, 23 Jul 2020 22:50:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9B37E6B002C; Thu, 23 Jul 2020 22:50:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8C8206B002E; Thu, 23 Jul 2020 22:50:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0218.hostedemail.com [216.40.44.218]) by kanga.kvack.org (Postfix) with ESMTP id 75BA56B002A for ; Thu, 23 Jul 2020 22:50:33 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 052AC144E8 for ; Fri, 24 Jul 2020 02:50:33 +0000 (UTC) X-FDA: 77071441146.13.skin76_3d0ade726f43 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id C9C601815EB6A for ; Fri, 24 Jul 2020 02:50:32 +0000 (UTC) X-HE-Tag: skin76_3d0ade726f43 X-Filterd-Recvd-Size: 3732 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf02.hostedemail.com (Postfix) with ESMTP for ; Fri, 24 Jul 2020 02:50:32 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E01BE206C1; Fri, 24 Jul 2020 02:50:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595559031; bh=UlRguDF9F93X6TAdHSl8oLCte1cdlF12zQGSwWi7QTE=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=J9LYxuQT2CyH+cQDZMp7VSIuYSbIuNmXZXem2iy9NXOlF3SZeFnv0iK9MjvrvjFa9 dpvYZLBP3S+QCotHljNSEMQVMPsQxFYdbHbMEoaSWiYt2grGnK2pbUyJ39HHWErOC0 Hm8kpcuBAOAO3z6jXWS94KXfSXwp/B1KFsJAL3hA= Date: Thu, 23 Jul 2020 19:50:29 -0700 From: Andrew Morton To: Uladzislau Rezki Cc: Qian Cai , bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, mingo@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org, sfr@canb.auug.org.au, linux-next@vger.kernel.org, lpf.vector@gmail.com, Uladzislau Rezki , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Stephen Rothwell , Pengfei Li , Shakeel Butt , Arnd Bergmann , Michal Hocko , Yafang Shao , Joel Fernandes , Matthew Wilcox , Oleksiy Avramchenko , Steven Rostedt , Mike Rapoport , David Hildenbrand , Joerg Roedel , Roman Gushchin , Dennis Zhou , Naresh Kamboju Subject: Re: kernel BUG at mm/vmalloc.c:LINE! (2) Message-Id: <20200723195029.60933e30f5d3dd64d6a861b3@linux-foundation.org> In-Reply-To: <20200722144650.GA19628@pc636> References: <000000000000588c2c05aa156b2b@google.com> <0000000000003cdc6c05aae24652@google.com> <20200720200618.GA9501@pc636> <20200722142759.GB4041@lca.pw> <20200722144650.GA19628@pc636> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: C9C601815EB6A X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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 Wed, 22 Jul 2020 16:46:50 +0200 Uladzislau Rezki wrote: > > > I can check further, but it can be it was not correctly reverted, > > > because everything should work just fine even with the revert, > > > though i i do not understand a reason of reverting. > > > > Vlad, how sure are you about this? We also start to trigger this now on > > linux-next, but the reverting patch surely looks like doggy without any useful > > information in the commit description. > > > Hello, Andrew, Qian. > > I am not aware of reason of the revert, though i tried to get through Ingo. > I can send out a patch that fixes the revert. Another option to drop the > revert, but it is up to Andrew and Ingo. > > Andrew, could you please comment on? All a bit mysterious. I think it's best that we revert this from linux-next until we hear from Ingo. I queued a patch - I expect Stephen will see and grab it, thanks.