Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: 2.6.15-mm4 failure on power5 | Date | Wed, 18 Jan 2006 11:19:36 +1100 |
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On Wed, 18 Jan 2006 01:00, Ingo Molnar wrote: > * Michael Ellerman <michael@ellerman.id.au> wrote: > > On Tue, 17 Jan 2006 08:52, Dave C Boutcher wrote: > > > 2.6.15-mm4 won't boot on my power5 either. I tracked it down to the > > > following mutex patch from Ingo: kernel-kernel-cpuc-to-mutexes.patch > > > > > > If I revert just that patch, mm4 boots fine. Its really not obvious to > > > me at all why that patch is breaking things though... > > > > My POWER5 (gr) LPAR seems to boot ok (3 times so far) with that patch, > > guess it's something subtle. That's with CONFIG_DEBUG_MUTEXES=y. And > > it's just booted once with CONFIG_DEBUG_MUTEXES=n. > > > > And now it's booted the full mm4 patch set without blinking. > > so it booted fine with CONFIG_DEBUG_MUTEXES=n but with that patch not > applied? > > the patch will likely work around the bug, so DEBUG_MUTEXES=y/n should > make no difference with that patch applied.
It booted fine _with_ the patch applied, with DEBUG_MUTEXES=y and n.
Boutcher, to be clear, you can't boot with kernel-kernel-cpuc-to-mutexes.patch applied and DEBUG_MUTEXES=y ?
But if you revert kernel-kernel-cpuc-to-mutexes.patch it boots ok?
This is looking quite similar to another hang we're seeing on Power4 iSeries on mainline git: http://ozlabs.org/pipermail/linuxppc64-dev/2006-January/007679.html
cheers
-- Michael Ellerman IBM OzLabs
email: michael:ellerman.id.au inmsg: mpe:jabber.org wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183)
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