Re: Linux 3.19-rc5

[Rafael J. Wysocki]

On Thursday, January 29, 2015 05:12:11 PM Linus Torvalds wrote:
> On Thu, Jan 29, 2015 at 5:22 PM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> > On Wednesday, January 21, 2015 05:54:00 PM Peter Hurley wrote:
> >>
> >> Yeah, but the debug check is triggering worse behavior, requiring
> >> bisecting back to the debug commit.
> >
> > Yes, it is.
> >
> > So I'm wondering is anyone is working on fixing this in any way?
> >
> > It kind of sucks when this is happening on an otherwise perfectly usable
> > old(ish) machine ...
> 
> The WARN() was already changed to a WARN_ONCE().
> 
> So that debug check doesn't cause problems any more. If somebody is
> bisecting something else, and the WARN() is a problem for those
> intermediate kernels, then just disabling CONFIG_DEBUG_ATOMIC_SLEEP
> should get you past that point.
> 
> IOW, this really shouldn't be an issue.
> 
> Does the pccard thing still not work?

Interestingly enough, if the kernel is built with CONFIG_DEBUG_ATOMIC_SLEEP
unset, the problem with 99+% CPU load from pccardd goes away, so thanks for
the hint.

Rafael

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