Re: [PATCH 0/7] DRM kmap() fixes and kmap_local_page() conversions

[Christian König]

Am 20.01.22 um 00:55 schrieb Ira Weiny:
> On Wed, Jan 19, 2022 at 06:24:22PM +0100, Daniel Vetter wrote:
> > On Wed, Jan 19, 2022 at 08:53:56AM -0800, Ira Weiny wrote:
> > > On Fri, Dec 10, 2021 at 03:23:57PM -0800, 'Ira Weiny' wrote:
> > > > From: Ira Weiny <ira.weiny@xxxxxxxxx>
> > > >
> > > > This series starts by converting the last easy kmap() uses to
> > > > kmap_local_page().
> > > >
> > > > There is one more call to kmap() wrapped in ttm_bo_kmap_ttm().  Unfortunately,
> > > > ttm_bo_kmap_ttm() is called in a number of different ways including some which
> > > > are not thread local.  I have a patch to convert that call.  However, it is not
> > > > straight forward so it is not included in this series.
> > > >
> > > > The final 2 patches fix bugs found while working on the ttm_bo_kmap_ttm()
> > > > conversion.
> > > Gentile ping on this series?  Will it make this merge window?
> > I think this fell through the cracks and so no. Note that generally we
> > feature-freeze drm tree around -rc6 anyway for the upcoming merge window,
> > so you were cutting this all a bit close anyway.
> Ok, No problem.  I just had not heard if this was picked up or not.
>
> > Also looks like the ttm
> > kmap caching question didn't get resolved?
> I'm sorry I thought it was resolve for this series.  Christian said the patches
> in this series were "a good bug fix" even if not strictly necessary.[1]  Beyond
> this series I was discussing where to go from here, and is it possible to go
> further with more changes.[2]  At the moment I don't think I will.
>
> Christian did I misunderstand?  I can drop patch 6 and 7 if they are not proper
> bug fixes or at least clarifications to the code.

Yeah, it is indeed a correct cleanup. I would just *not* put a CC stable 
on it because it doesn't really fix anything.

Christian.

> Ira
>
> [1] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Flkml%2Fc3b173ea-6509-ebbe-b5f9-eeb29f1ce57e%40amd.com%2F&amp;data=04%7C01%7Cchristian.koenig%40amd.com%7C5e0192210d4640adb88b08d9dba734b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637782333459591089%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=4p7jCB6pB4nlcUtLWh6K2Sso9X%2BsRSK7mcD8UavzztQ%3D&amp;reserved=0
> [2] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Flkml%2F20211215210949.GW3538886%40iweiny-DESK2.sc.intel.com%2F&amp;data=04%7C01%7Cchristian.koenig%40amd.com%7C5e0192210d4640adb88b08d9dba734b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637782333459591089%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=6%2BGfSKshg8Xr%2FXJshiU28yHzbg2HcVisVJLDU6tVUT4%3D&amp;reserved=0
>
> > Anyway if patches are stuck resend with RESEND and if people still don't
> > pick them up poke me and I'll apply as fallback.
> >
> > Cheers, Daniel
> >
> > > Thanks,
> > > Ira
> > >
> > > > Ira Weiny (7):
> > > > drm/i915: Replace kmap() with kmap_local_page()
> > > > drm/amd: Replace kmap() with kmap_local_page()
> > > > drm/gma: Remove calls to kmap()
> > > > drm/radeon: Replace kmap() with kmap_local_page()
> > > > drm/msm: Alter comment to use kmap_local_page()
> > > > drm/amdgpu: Ensure kunmap is called on error
> > > > drm/radeon: Ensure kunmap is called on error
> > > >
> > > > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 ++++----
> > > > drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 1 +
> > > > drivers/gpu/drm/gma500/gma_display.c | 6 ++----
> > > > drivers/gpu/drm/gma500/mmu.c | 8 ++++----
> > > > drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 4 ++--
> > > > drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c | 8 ++++----
> > > > drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c | 4 ++--
> > > > drivers/gpu/drm/i915/gt/shmem_utils.c | 4 ++--
> > > > drivers/gpu/drm/i915/i915_gem.c | 8 ++++----
> > > > drivers/gpu/drm/i915/i915_gpu_error.c | 4 ++--
> > > > drivers/gpu/drm/msm/msm_gem_submit.c | 4 ++--
> > > > drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++--
> > > > drivers/gpu/drm/radeon/radeon_uvd.c | 1 +
> > > > 13 files changed, 32 insertions(+), 32 deletions(-)
> > > >
> > > > --
> > > > 2.31.1
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fblog.ffwll.ch%2F&amp;data=04%7C01%7Cchristian.koenig%40amd.com%7C5e0192210d4640adb88b08d9dba734b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637782333459591089%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=NLqm91HCdllhW%2BrQ8aHMLXhYGkOJrYffpjsIJZWaFBc%3D&amp;reserved=0