Re: a whole bunch of crashes since todays -mm merge.

[Linus Torvalds]

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.

              Linus
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