From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f71.google.com (mail-pg0-f71.google.com [74.125.83.71]) by kanga.kvack.org (Postfix) with ESMTP id 30FF56B0011 for ; Wed, 14 Feb 2018 22:46:16 -0500 (EST) Received: by mail-pg0-f71.google.com with SMTP id w19so3056936pgv.4 for ; Wed, 14 Feb 2018 19:46:16 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:e::133]) by mx.google.com with ESMTPS id i7si7129710pgq.209.2018.02.14.19.46.15 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 14 Feb 2018 19:46:15 -0800 (PST) Date: Wed, 14 Feb 2018 19:46:13 -0800 From: Matthew Wilcox Subject: Re: freezing system for several second on high I/O [kernel 4.15] Message-ID: <20180215034613.GC5775@bombadil.infradead.org> References: <20180206060840.kj2u6jjmkuk3vie6@destitution> <1517974845.4352.8.camel@gmail.com> <20180207065520.66f6gocvxlnxmkyv@destitution> <1518255240.31843.6.camel@gmail.com> <1518255352.31843.8.camel@gmail.com> <20180211225657.GA6778@dastard> <1518643669.6070.21.camel@gmail.com> <20180214215245.GI7000@dastard> <1518666178.6070.25.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1518666178.6070.25.camel@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: mikhail Cc: Dave Chinner , "linux-xfs@vger.kernel.org" , "linux-mm@kvack.org" On Thu, Feb 15, 2018 at 08:42:58AM +0500, mikhail wrote: > [101309.501428] (sb_internal#2){.+.+}, at: [<00000000df1d676f>] xfs_trans_alloc+0xe2/0x120 [xfs] > [101309.501465] > but task is already holding lock: > [101309.501466] (fs_reclaim){+.+.}, at: [<000000002ed6959d>] fs_reclaim_acquire.part.74+0x5/0x30 > [101309.501470] > which lock already depends on the new lock. This one's an already-known mis-annotation. -- 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