On Tue, Dec 19, 2017 at 8:45 AM, Christian König <ckoenig.leichtzumerken@xxxxxxxxx> wrote: > Am 19.12.2017 um 11:39 schrieb Michel Dänzer: >> >> On 2017-12-19 11:37 AM, Michel Dänzer wrote: >>> >>> On 2017-12-18 08:01 PM, Tobias Klausmann wrote: >>>> >>>> On 12/18/17 7:06 PM, Mike Galbraith wrote: >>>>> >>>>> Greetings, >>>>> >>>>> Kernel bound workloads seem to trigger the below for whatever reason. >>>>> I only see this when beating up NFS. There was a kworker wakeup >>>>> latency issue, but with a bandaid applied to fix that up, I can still >>>>> trigger this. >>>> >>>> >>>> Hi, >>>> >>>> i have seen this one as well with my system, but i could not find an >>>> easy way to trigger it for bisecting purpose. If you can trigger it >>>> conveniently, a bisect would be nice! >>> >>> I'm seeing this (with the amdgpu and radeon drivers) when restic takes a >>> backup, creating memory pressure. I happen to have just finished >>> bisecting, the result is: >>> >>> 648bc3574716400acc06f99915815f80d9563783 is the first bad commit >>> commit 648bc3574716400acc06f99915815f80d9563783 >>> Author: Christian König <christian.koenig@xxxxxxx> >>> Date: Thu Jul 6 09:59:43 2017 +0200 >>> >>> drm/ttm: add transparent huge page support for DMA allocations v2 >>> >>> Try to allocate huge pages when it makes sense. >>> >>> v2: fix comment and use ifdef >>> >>> >> BTW, I haven't noticed any bad effects other than the dmesg splats, so >> maybe it's just noise about transient failures for which there is a >> proper fallback in place. > > > Yeah, I think that is exactly what happens here. > > We try to allocate a huge page, but fail and so fall back to using multiple > 4k pages instead. > > Going to send out a patch to suppress the warning. Hi Christian, Did you ever send out such a patch? I didn't see one on the list, but perhaps I missed it. One definitely hasn't made it upstream yet. (I just hit the issue myself with Linus's tree from last night.) Thanks, -ilia _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
