Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy

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From	Vlastimil Babka <vbabka@suse.cz>
Newsgroups	linux.kernel
Subject	Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy
Date	Thu, 01 Dec 2016 08:50:01 +0100
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X-Original-To	Michal Hocko <mhocko@kernel.org>, "Robin H. Johnson" <robbat2@gentoo.org>
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On 12/01/2016 08:21 AM, Michal Hocko wrote:
> Forgot to CC Joonsoo. The email thread starts more or less here
> http://lkml.kernel.org/r/20161130092239.GD18437@dhcp22.suse.cz
>
> On Thu 01-12-16 08:15:07, Michal Hocko wrote:
>> On Wed 30-11-16 20:19:03, Robin H. Johnson wrote:
>> [...]
>> > alloc_contig_range: [83f2a3, 83f2a4) PFNs busy
>>
>> Huh, do I get it right that the request was for a _single_ page? Why do
>> we need CMA for that?

Ugh, good point. I assumed that was just the PFNs that it failed to migrate 
away, but it seems that's indeed the whole requested range. Yeah sounds some 
part of the dma-cma chain could be smarter and attempt CMA only for e.g. costly 
orders.

Thread

PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs busy "Robin H. Johnson" <robbat2@orbis-terrarum.net> - 2016-11-29 23:50 +0100
  Re: PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs  busy Michal Hocko <mhocko@kernel.org> - 2016-11-30 10:30 +0100
    Re: PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs busy Michal Nazarewicz <mina86@mina86.com> - 2016-11-30 14:10 +0100
      Re: PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs  busy Michal Hocko <mhocko@kernel.org> - 2016-11-30 14:30 +0100
        Re: PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs  busy "Robin H. Johnson" <robbat2@gentoo.org> - 2016-11-30 21:00 +0100
          drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy "Robin H. Johnson" <robbat2@gentoo.org> - 2016-11-30 21:20 +0100
            Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Vlastimil Babka <vbabka@suse.cz> - 2016-11-30 22:30 +0100
              Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy "Robin H. Johnson" <robbat2@gentoo.org> - 2016-12-01 07:30 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Vlastimil Babka <vbabka@suse.cz> - 2016-12-01 08:40 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy "Robin H. Johnson" <robbat2@gentoo.org> - 2016-12-01 09:00 +0100
            Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Hocko <mhocko@kernel.org> - 2016-12-01 08:20 +0100
              Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Hocko <mhocko@kernel.org> - 2016-12-01 08:30 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Vlastimil Babka <vbabka@suse.cz> - 2016-12-01 08:50 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Hocko <mhocko@kernel.org> - 2016-12-01 15:20 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Nazarewicz <mina86@mina86.com> - 2016-12-01 17:10 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Hocko <mhocko@kernel.org> - 2016-12-01 17:20 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Michal Nazarewicz <mina86@mina86.com> - 2016-12-01 22:10 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Vlastimil Babka <vbabka@suse.cz> - 2016-12-02 07:40 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy  busy Lucas Stach <l.stach@pengutronix.de> - 2016-12-02 11:30 +0100
                Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy Jerome Glisse <j.glisse@gmail.com> - 2016-12-02 16:20 +0100
          Re: PROBLEM-PERSISTS: dmesg spam: alloc_contig_range: [XX, YY) PFNs busy Michal Nazarewicz <mina86@mina86.com> - 2016-12-01 02:40 +0100

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