Re: a whole bunch of crashes since todays -mm merge.
From: Dave Jones
Date: Thu Jun 07 2012 - 21:00:14 EST
On Thu, Jun 07, 2012 at 05:52:52PM -0700, Linus Torvalds wrote:
> On Thu, Jun 7, 2012 at 5:24 PM, Dave Jones <davej@xxxxxxxxxx> wrote:
> > I just started seeing crashes while doing simple things, like logging on a console..
>
> I'm looking at it right now, and the sync_mm_rss() patch is pure
> garbage. In many ways.
>
> You can't do sync_mm_rss() from mmdrop(), because there's no reason to
> believe that the task that does mmdrop() does it on its own active_mm.
> And even if you *could* do it there, it's still horribly wrong,
> because it does it at the end *after* it already freed the mm!
>
> Does it go away if you revert that (commit 40af1bbdca47). I wish I
> hadn't merged it, or that I had noticed how horrible it was before I
> pushed out.
Hmm, I did a rebuild with a r8169 debug patch Francois sent me backed out,
and now it looks like it's fine again.
Or I might just be getting lucky..
Dave
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