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Date: Wed, 2 Feb 2011 21:24:20 -0500 (EST) From: "John David Anglin" <dave@...uly1.hia.nrc.ca> To: mroos@...ux.ee (Meelis Roos) Cc: linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: 2.6.38-rc3 regression on parisc: segfaults > I have been testing devel kernels on SMP L1000 successfully until > 2.6.38-rc2-00324-g70d1f36 included. The testing means booting the new > kernel and running aptitude to update to current debian unstable. > > Now I tried 2.6.38-rc3 and got a crash from aptitude on 2 out of 2 > tries. Maybe aptitude was broken inbetween but it looks like a kernel > bug. Retried 2.6.38-rc2-00324-g70d1f36 and that seemed to work fine so > it's more likely a kernel problem. If aptitude fails consistently, it should be possible to debug or isolate to a particular kernel change. Usually, SMP segvs don't provide much information as to the cause of the problem. strace output and a gdb backtrace would be useful. I have seen improved SMP stability building with GCC 4.5.3 (try a recent snap). This fixes an asm/branch problem. It seems like James' flush patch hasn't been pulled. Dave -- J. David Anglin dave.anglin@...-cnrc.gc.ca National Research Council of Canada (613) 990-0752 (FAX: 952-6602) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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