svn commit: r221703 - in head/sys: amd64/include i386/include
x86/isa x86/x86
Stanislav Sedov
stas at FreeBSD.org
Thu May 12 10:52:56 UTC 2011
On Thu, 12 May 2011 13:43:58 +0300
Andriy Gapon <avg at FreeBSD.org> mentioned:
>
> Theory:
> - smp_rv_waiters[2] becomes equal to smp_rv_ncpus
> - [at least] one slave CPU is still in the last call to cpu_spinwait() in
> smp_rendezvous_action()
> - master CPU notices that the condition is true, exits smp_rendezvous_cpus() and
> calls it again
> - the slave CPU is still in spinwait
> - the master CPU resets smp_rv_waiters[2] to zero
> - the slave CPU exits spinwait, see smp_rv_waiters[2] with zero value
> - endless loop
>
That might explain it.
Do you have a patch for me to try?
Thanks!
--
Stanislav Sedov
ST4096-RIPE
() ascii ribbon campaign - against html e-mail
/\ www.asciiribbon.org - against proprietary attachments
More information about the svn-src-head
mailing list