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@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>