Messages in this thread | | | Subject | Re: drm/radeon spamming alloc_contig_range: [xxx, yyy) PFNs busy busy | From | Vlastimil Babka <> | Date | Thu, 1 Dec 2016 08:43:40 +0100 |
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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.
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