[Mesa-dev] [Mesa-stable] [PATCH 1/2] i965/bufmgr: Add a helper to mark a BO as external

[Jason Ekstrand]

On Tue, Dec 12, 2017 at 5:42 AM, Emil Velikov <emil.l.velikov at gmail.com>
wrote:

> On 11 December 2017 at 22:03, Jason Ekstrand <jason at jlekstrand.net> wrote:
> > On Mon, Dec 11, 2017 at 12:08 PM, Emil Velikov <emil.l.velikov at gmail.com
> >
> > wrote:
> >>
> >> On 21 November 2017 at 00:13, Andres Gomez <agomez at igalia.com> wrote:
> >> > Jason, this nominated series landed without mentioning any specific
> >> > stable queue.
> >> >
> >> > From what I'm seeing, both depend on 2c4097aff1b which didn't make it
> >> > for 17.2 so I'm dropping them for that queue.
> >> >
> >> This is a preparatory patch for the follow-up commit.
> >> With the latter addressing issue caused by
> >> 4b1e70cc57d7ff5f465544644b2180dee1490cee - only available in
> >> 17.4.0-dev.
> >>
> >> I believe the 17.2 and 17.3 series should be safe ;-)
> >
> >
> > This bug goes all the way back.  It interacts with the patch mentioned
> but
> > is not the same thing.  This patch (and the subsequent one) should
> probably
> > go back as far as brw_bufmgr does.
> Having a closer look at the patches related to external buffers, shows
> the following:
>
> 2c4097aff1b i965: Only put external handles into the handle ht
> 17.3 only
>
> d7a19d69ebc i965: Use PTE MOCS for all external buffers
> 17.4 + 17.3
> 4b1e70cc57d i965: Switch over to fully external-or-not MOCS scheme
> 17.4 only
>
> 344252a27f8 i965/bufmgr: Add a helper to mark a BO as external
> 0a6a137eb27 i965: Mark BOs as external when we export their handle
> These fixes
>
> With the above in mind, it seems that 4b1e70cc57d should have been
> tagged for 17.3?
>

It's not strictly necessary but probably makes back-porting easier.  I'm
fine with pulling it into 17.3.


> On the 17.2 front: Andres is right - commit 2c4097aff1b seems like a
> bare minimum for this series.
> Considering how well into the 17.2 series we are, I'm a bit worried
> about picking if :-\
>

Agreed.
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