linux-kernel - Re: [Intel-gfx] [PATCH 0/7] DRM kmap() fixes and kmap_local

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Message-ID: <20220120165717.GG209936@iweiny-DESK2.sc.intel.com>
Date:   Thu, 20 Jan 2022 08:57:17 -0800
From:   Ira Weiny <ira.weiny@...el.com>
To:     Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [Intel-gfx] [PATCH 0/7] DRM kmap() fixes and kmap_local_page()
 conversions

On Thu, Jan 20, 2022 at 04:48:50PM +0100, Daniel Vetter wrote:
> On Thu, Jan 20, 2022 at 09:16:35AM +0100, Christian König wrote:
> > 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@...el.com>
> > > > > > 
> > > > > > 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.
> 
> Ok can you pls get the amd/radeon ones stuffed into alex' tree? Or do we
> want to put all the ttm ones into drm-misc instead?

I just updated to the latest master and there is a minor conflict.  Since this
is not going in this window.  Let me rebase and resend.

Ira

> -Daniel
>