From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wj0-f198.google.com (mail-wj0-f198.google.com [209.85.210.198]) by kanga.kvack.org (Postfix) with ESMTP id 7C2406B0033 for ; Fri, 20 Jan 2017 08:34:08 -0500 (EST) Received: by mail-wj0-f198.google.com with SMTP id h7so14959816wjy.6 for ; Fri, 20 Jan 2017 05:34:08 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id f186si3441404wma.165.2017.01.20.05.34.07 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 20 Jan 2017 05:34:07 -0800 (PST) Subject: Re: Linux 4.10-rc2 arm: dmesg flooded with alloc_contig_range: [X, Y) PFNs busy References: <6c67577e-8b72-c958-40af-2096d8840fbe@osg.samsung.com> From: Vlastimil Babka Message-ID: Date: Fri, 20 Jan 2017 14:34:02 +0100 MIME-Version: 1.0 In-Reply-To: <6c67577e-8b72-c958-40af-2096d8840fbe@osg.samsung.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Shuah Khan , Andrew Morton , mgorman@techsingularity.net, mhocko@suse.com, hannes@cmpxchg.org, iamjoonsoo.kim@lge.com, izumi.taku@jp.fujitsu.com Cc: LKML , linux-mm@kvack.org, Lucas Stach On 01/18/2017 01:23 AM, Shuah Khan wrote: > Hi, > > dmesg floods with PFNs busy messages. > > [10119.071455] alloc_contig_range: [bb900, bbc00) PFNs busy > [10119.071631] alloc_contig_range: [bba00, bbd00) PFNs busy > [10119.071762] alloc_contig_range: [bbb00, bbe00) PFNs busy > [10119.071940] alloc_contig_range: [bbc00, bbf00) PFNs busy > [10119.072039] alloc_contig_range: [bbd00, bc000) PFNs busy > [10119.072188] alloc_contig_range: [bbe00, bc100) PFNs busy > [10119.072301] alloc_contig_range: [bbf00, bc200) PFNs busy > [10119.072403] alloc_contig_range: [bc000, bc300) PFNs busy > [10119.072549] alloc_contig_range: [bc100, bc400) PFNs busy > [10119.072584] [drm:exynos_drm_gem_create] *ERROR* failed to allocate buffer. > > I think this is triggered when drm tries to allocate CMA buffers. > I might have seen one or two messages in 4.9, but since 4.10, it > just floods dmesg. > > Is this a known problem? I am seeing this on odroid-xu4 Hi, yes most likely it's the problem fixed by this patch in mmotm/linux-next: http://ozlabs.org/~akpm/mmots/broken-out/mm-alloc_contig-re-allow-cma-to-compact-fs-pages.patch > Linux odroid 4.10.0-rc2-00251-ge03c755-dirty #12 SMP PREEMPT > Wed Jan 11 23:12:52 UTC 2017 armv7l armv7l armv7l GNU/Linux > > thanks, > -- Shuah > -- 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