Re: frequent lockups in 3.18rc4

[Dave Jones]

On Wed, Dec 17, 2014 at 11:51:45AM -0800, Linus Torvalds wrote:
 > On Wed, Dec 17, 2014 at 10:57 AM, Dave Jones <davej@xxxxxxxxxx> wrote:
 > > On Wed, Dec 17, 2014 at 01:22:41PM -0500, Dave Jones wrote:
 > >
 > >  > I'm going to try your two patches on top of .18, with the same kernel
 > >  > config, and see where that takes us.
 > >  > Hopefully to happier places.
 > >
 > > Not so much.  Died very quickly.
 > 
 > Damn, damn, damn. That's because of a stupid typo on the patches. We
 > have these very similar variables ("flags" and "fault") that have very
 > similar fault information, but they are completely different.
 > 
 > The "fault & FAULT_FLAG_USER" test is wrong, it should test "flags &
 > FAULT_FLAG_USER". Patch attached.

Yup, that seems to be the only obvious bug in those commits.
It's survived for long with that change on top.

 > The half-way good news is that this certainly confirms that trinity is
 > triggering the "page fault with fatal signal pending" special case.

Now let's see how long it runs for..

	Dave
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