more intel drm issues (was Re: [git pull] drm intel only fixes)

[Jeff Chua]

On Thu, Jan 20, 2011 at 2:22 PM, Linus Torvalds
<torvalds at linux-foundation.org> wrote:
> On Wed, Jan 19, 2011 at 8:55 PM, Jeff Chua <jeff.chua.linux at gmail.com> wrote:
>>
>> Rafael send out two patches earlier. Could be related. I was facing
>> issue during resume.
>
> No, I'm aware of the rcu-synchronize thing, this isn't it. This is
> really at the suspend stage, and I had bisected it down to the drm
> changes.
>
> In fact, by now I have bisected it down to a single commit. It's
> another merge commit, which makes me a bit nervous (I bisected another
> issue today, and it turned out to simply not be repeatable).
>
> But this time the merge commit actually has a real conflict that got
> fixed up in the merge, and the code around the conflict waits for
> three seconds, and three seconds is also exactly how long the delay at
> suspend time is. So I get the feeling that this time it's a real
> issue, and what happened was that the merge may have been a mismerge.

I did see that once during suspend. But as you mentioned,  3 seconds,
and it wasn't repeatable. It was at the first suspend right after
reboot.


Jeff