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Groups > linux.debian.kernel > #73248

Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines?

From Nathaniel Filardo <nwfilardo@gmail.com>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines?
Date 2021-10-10 16:00 +0200
Message-ID <D6HwR-5rU-9@gated-at.bofh.it> (permalink)
References <Ctxhf-3p8-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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It occurs to me, quite belatedly, that it may be worth asking the
author, reviewers, and signers of the change in question their
thoughts on this bug report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990279

In particular, on ppc64 systems, Linux typically is configured to use
a 64KiB page (i.e., shift 16) rather than 4KiB (shift 12) page.  It
looks, however, that AMDGPU_GPU_PAGE_SIZE is always 4096, and so
something (perhaps in userspace, even, eek?) is requesting
4KiB-but-not-64KiB alignment of this buffer.

Any insight you could offer would be deeply appreciated.
Thanks,
--nwf;

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Thread

Bug#990279: linux-image-5.10.0-7-powerpc64le: Upgrade to 5.10.0-7-powerpc64le from 5.10.0-0.bpo.5-powerpc64le breaks amdgpu Nathaniel Wesley Filardo <nwfilardo@gmail.com> - 2021-06-24 15:20 +0200
  Bug#990279: Also affects stable... Timothy Pearson <tpearson@raptorengineering.com> - 2021-07-25 07:00 +0200
    Bug#990279: Also affects stable... Timothy Pearson <tpearson@raptorengineering.com> - 2021-07-25 23:20 +0200
  Bug#990279: linux-image-5.10.0-7-powerpc64le: Upgrade to 5.10.0-7-powerpc64le from 5.10.0-0.bpo.5-powerpc64le breaks amdgpu Nathaniel Filardo <nwfilardo@gmail.com> - 2021-08-10 03:30 +0200
  Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Nathaniel Filardo <nwfilardo@gmail.com> - 2021-10-10 16:00 +0200
    Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Xi Ruoyao <xry111@mengyan1223.wang> - 2021-10-10 16:30 +0200
  Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Salvatore Bonaccorso <carnil@debian.org> - 2021-10-13 22:20 +0200
    Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Salvatore Bonaccorso <carnil@debian.org> - 2021-10-30 16:40 +0200
  Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Nathaniel Filardo <nwfilardo@gmail.com> - 2022-01-28 00:10 +0100
  Bug#990279: 9a89a721b41b (" drm/amdgpu: check alignment on CPU page for bo map") breaks amdgpu on ppc64 machines? Andrew <akaminski@mailfence.com> - 2022-01-29 00:20 +0100
  Bug#990279: Status? Timothy Pearson <tpearson@raptorengineering.com> - 2022-02-08 20:40 +0100
    Bug#990279: Status? Salvatore Bonaccorso <carnil@debian.org> - 2022-02-08 22:30 +0100
  Bug#990279: Status? Timothy Pearson <tpearson@raptorengineering.com> - 2022-02-08 22:30 +0100
  Bug#990279: Status? Timothy Pearson <tpearson@raptorengineering.com> - 2022-02-09 20:30 +0100
    Bug#990279: Status? Salvatore Bonaccorso <carnil@debian.org> - 2022-02-09 21:30 +0100
      Bug#990279: Status? Timothy Pearson <tpearson@raptorengineering.com> - 2022-02-09 21:30 +0100
  Bug#990279: Status? Andrew <akaminski@mailfence.com> - 2022-03-09 21:10 +0100

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