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Date: Sun, 3 Oct 2010 23:36:16 +0200 From: Mikael Pettersson <mikpe@...uu.se> To: Mikael Pettersson <mikpe@...uu.se> Cc: sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [2.6.36-rc regression] occasional complete system hangs on sparc64 SMP Mikael Pettersson writes: > On my Sun Blade 2500 (2 CPUs), post 2.6.35 kernels sometimes hang > completely without visible messages on either the console or in > the kernel logs. > > The first two times (with -rc1 or -rc3) it happended during gcc > bootstraps + regression test runs, today (with -rc4) it happended > while compiling the 2.6.36-rc5 kernel. It's very sporadic, perhaps > one of ten boots will eventually hang like this. > > With 2.6.35 the machine is rock solid. > > The 2.6.36-rc kernels do appear to be solid on a UP Ultra5, but that > one no longer does any gcc builds or tests, only kernel builds. > > Any ideas, or do I have to try to bisect this? I've been testing older kernels and can now say that 2.6.35-git5 and newer kernels are definitely affected, but 2.6.35-git4 seems solid. I'll dig deeper into the .35-git4->git5 changes towards the end of next week. I never got any data out of sysrq-y or any other sysrq when a hang occurs; usually they'd just print the name of the command but no data, sometimes they'd oops and crash the kernel even harder. /Mikael -- 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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