Re: Possible regression? 2.6.26-rc1: T61s failure after suspend/resume

Glauber Costa
2008-05-09T16:26:37Z

On Fri, May 9, 2008 at 1:21 PM, Hugh Dickins <hugh@veritas.com> wrote:
> On Fri, 9 May 2008, Glauber Costa wrote:
> >
> > I can't reproduce it neither, and looking at the code over and over
> > again, see no obvious point for the breakage. I'll try to reproduce it
> > myself,
> > to see if I can spot something. But correct me if I'm wrong, this is
> > all 64-bit machines, right?
> >
> > I'm stuck with mostly 32-bit hardware, but will give it a try anyway.
>
> The machine is 64-bit capable (Core2 Duo), but the kernels I'm running
> for this are 32-bit, so I doubt that the 64-bitability is relevant.
> I'd love to see what happens with a 64-bit kernel, but I never get
> back from suspend with it (and that's not a recent regression).
> Carlos is also seeing this with a 32-bit kernel (on P4 Xeon with HT).
>
> Please don't take my git bisection result too seriously: that's where
> it led when I fudged things around enough, and treated blank screens
> as manifestations of the problem, which very likely they're not
> (there's some other bug which makes it very variable how quickly
> I resume). And also, I wasn't checking how many cpus came up each
> time: I wouldn't be surprised if at some points in your series only
> one would come up, which would then look like a "good" point to me.
>
This is very unlikely. Exactly because I knew problems were likely to
arise in such a delicate thing, I was
extremely careful to make it not an issue. But yeah, ultimately, it can happen.

--
Glauber Costa.
"Free as in Freedom"
http://glommer.net

"The less confident you are, the more serious you have to act."