On Sun, 2008-12-28 at 03:45 +0300, malc wrote: > On Thu, 25 Dec 2008, Benjamin Herrenschmidt wrote: > > > On Wed, 2008-12-24 at 03:08 +0300, m...@pulsesoft.com wrote: > >> Ken Moffat <zarniwh...@ntlworld.com> writes: > >> > >>> On Tue, Dec 23, 2008 at 06:04:45AM +0300, m...@pulsesoft.com wrote: > > [..snip..] > > >> > >> Thanks for the reference, but i'm sure, now more than ever, that bad > >> memory has nothing to do with it, all signs are there that kernel is > >> confused by the way signals are (mis)used by Mono. > > > > It shouldn't be but I agree with you, it smells bad. Can you report that > > again on the linuxppc-dev@ozlabs.org mailing list ? Along with > > instructions to d/l, install & run the minimum repro-case ? I'll try to > > give it a go on different ppc64 machines as soon as I'm over my upcoming > > xmas hangover :-) If it appears to be ps3 specific, we can work with > > Geoff Levand (PS3 maintainer for Sony) to try to identify the root cause > > and fix it. > > I've posted a message to linuxppc-dev via gmane, but AFAICS it never made > it there. Anyhow, here's another try: > > Mono can be obtained from: > http://ftp.novell.com/pub/mono/sources/mono/mono-2.0.1.tar.bz2 > > Although 2.0.1 only supports ppc32 the problem is still reproducible. > > Now to the Christmas cheer, i've tried v2.6.28 and couldn't help but > notice that the problem is gone, bisecting v2.6.27 (which funnily i > had to mark good) to v2.6.28 (which has to be marked bad) wasn't fun > but eventually converged at ab598b6680f1e74c267d1547ee352f3e1e530f89 > > commit ab598b6680f1e74c267d1547ee352f3e1e530f89 > Author: Paul Mackerras <pau...@samba.org> > Date: Sun Nov 30 11:49:45 2008 +0000 > > powerpc: Fix system calls on Cell entered with XER.SO=1 > > Now the lock-up is gone, however the code never exercises the path > taken during the lock-up so i guess it, at least, deserves a better > look by PPC64 care takers.
I'm confused. Which code never exercises which path, and so what deserves a better look? AFAICT this fix will help you, and could explain your problem. You're on Cell, so you're using the mftb workaround, and ps3_defconfig has CONFIG_VIRT_CPU_ACCOUNTING=y. cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person
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