On 05/15/2018 09:08 AM, Tom Lendacky wrote: > On 5/15/2018 7:34 AM, Nath, Arindam wrote: >> >>> -----Original Message----- >>> From: Joseph Salisbury [mailto:joseph.salisbury at canonical.com] >>> Sent: Tuesday, May 15, 2018 5:40 PM >>> To: Nath, Arindam <Arindam.Nath at amd.com> >>> Cc: iommu at lists.linux-foundation.org; Bridgman, John >>> <John.Bridgman at amd.com>; joro at 8bytes.org; amd- >>> gfx at lists.freedesktop.org; drake at endlessm.com; stein12c at gmail.com; >>> Suthikulpanit, Suravee <Suravee.Suthikulpanit at amd.com>; Deucher, >>> Alexander <Alexander.Deucher at amd.com>; Kuehling, Felix >>> <Felix.Kuehling at amd.com>; linux at endlessm.com; michel at daenzer.net; >>> 1747463 at bugs.launchpad.net; Lendacky, Thomas >>> <Thomas.Lendacky at amd.com> >>> Subject: Re: iommu/amd: flush IOTLB for specific domains only (v2) >>> >>> On 05/15/2018 04:03 AM, Nath, Arindam wrote: >>>> Adding Tom. >>>> >>>> Hi Joe, >>>> >>>> My original patch was never accepted. Tom and Joerg worked on another >>> patch series which was supposed to fix the issue in question in addition to do >>> some code cleanups. I believe their patches are already in the mainline. If I >>> remember correctly, one of the patches disabled PCI ATS for the graphics >>> card which was causing the issue. >>>> Do you still see the issue with latest mainline kernel? >>>> >>>> BR, >>>> Arindam >>>> >>>> -----Original Message----- >>>> From: Joseph Salisbury [mailto:joseph.salisbury at canonical.com] >>>> Sent: Tuesday, May 15, 2018 1:17 AM >>>> To: Nath, Arindam <Arindam.Nath at amd.com> >>>> Cc: iommu at lists.linux-foundation.org; Bridgman, John >>>> <John.Bridgman at amd.com>; joro at 8bytes.org; >>>> amd-gfx at lists.freedesktop.org; drake at endlessm.com; >>> stein12c at gmail.com; >>>> Suthikulpanit, Suravee <Suravee.Suthikulpanit at amd.com>; Deucher, >>>> Alexander <Alexander.Deucher at amd.com>; Kuehling, Felix >>>> <Felix.Kuehling at amd.com>; linux at endlessm.com; michel at daenzer.net; >>>> 1747463 at bugs.launchpad.net >>>> Subject: iommu/amd: flush IOTLB for specific domains only (v2) >>>> >>>> Hello Arindam, >>>> >>>> There is a bug report[0] that you created a patch[1] for a while back. >>> However, the patch never landed in mainline. There is a bug reporter in >>> Ubuntu[2] that is affected by this bug and is willing to test the patch. I >>> attempted to build a test kernel with the patch, but it does not apply to >>> currently mainline cleanly. Do you still think this patch may resolve this >>> bug? If so, is there a version of your patch available that will apply to current >>> mainline? >>>> Thanks, >>>> >>>> Joe >>>> >>>> [0] https://bugs.freedesktop.org/show_bug.cgi?id=101029 >>>> [1] https://patchwork.freedesktop.org/patch/157327/ >>>> [2] http://pad.lv/1747463 >>>> >>> Hi Arindam, >>> >>> Thanks for the feedback. Yes, the latest mainline kernel was tested, and it is >>> reported the bug still happens in the Ubuntu kernel bug[0]. Is there any >>> specific diagnostic info we can collect that might help? >> Joe, I believe all the information needed is already provided in [2]. Let us wait for inputs from Tom and Joerg. >> >> I could take a look at the issue locally, but it will take me some really long time since I am occupied with other assignments right now. > I don't see anything in the bug that indicates the latest mainline kernel > was tested. The patches/fixes in question are part of the 4.13 kernel, I > only see references to 4.10 kernels so I wouldn't expect the issue to be > resolved unless the patches from 4.13 were backported to the Ubuntu 4.10 > kernel. > > Thanks, > Tom > >> BR, >> Arindam >> >>> Thanks, >>> >>> Joe >>> >>> [0] http://pad.lv/1747463 Hi Tom, The request to test mainline was in comment #30[0]. However, the bug reporter stated the bug still existed on IRC and not in the bug report. I'll request he adds the test results to the bug. Thanks, Joe [0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1747463/comments/30
