amd64/135014: [padlock] Using padlock(4) in 8-current triggers "fpudna in kernel mode!" warnings

[Bruce Cran]

On Thursday 22 April 2010 19:04:58 Bruce Cran wrote:
> On Monday 05 April 2010 16:22:36 Bruce Cran wrote:
> > On Monday 05 April 2010 15:15:08 Michael Moll wrote:
> > > the patch from
> > > http://people.freebsd.org/~kib/misc/kern_fpu.2.patch
> > > fixes this problem for me.
> > 
> > The patch fixes the problem on my i386 mini-iTX system too.
> 
> I don't know if it's related, but I've been having regular crashes on the
> same box since applying the patch. Sometimes it runs for 12 hours, other
> times only for a few minutes.

I had thought the dumps were being corrupted but taking another look I've 
found the machine started generating core.txt files a couple of days ago which 
confirmed the crashes happening in fpu_kern_leave. I've built a kernel with 
the kern_fpu.3.patch and the machine has survived lots of network and disk 
traffic, which would normally have caused a crash.

-- 
Bruce Cran