From: Vlastimil Babka <vbabka@suse.cz>
To: Shuah Khan <shuahkh@osg.samsung.com>,
Andrew Morton <akpm@linux-foundation.org>,
mgorman@techsingularity.net, mhocko@suse.com, hannes@cmpxchg.org,
iamjoonsoo.kim@lge.com, izumi.taku@jp.fujitsu.com
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org, Lucas Stach <l.stach@pengutronix.de>
Subject: Re: Linux 4.10-rc2 arm: dmesg flooded with alloc_contig_range: [X, Y) PFNs busy
Date: Fri, 20 Jan 2017 14:34:02 +0100 [thread overview]
Message-ID: <db30a1b4-ef1d-3287-3ed0-a9b9c6989ce2@suse.cz> (raw)
In-Reply-To: <6c67577e-8b72-c958-40af-2096d8840fbe@osg.samsung.com>
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
>
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prev parent reply other threads:[~2017-01-20 13:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-18 0:23 Shuah Khan
2017-01-20 13:34 ` Vlastimil Babka [this message]
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