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Date: Fri, 19 Oct 2007 17:01:40 -0700 (PDT) From: David Miller <davem@...emloft.net> To: cebbert@...hat.com Cc: jeff@...zik.org, linux-kernel@...r.kernel.org Subject: Re: [2.6.23] tasks stuck in running state? From: Chuck Ebbert <cebbert@...hat.com> Date: Fri, 19 Oct 2007 18:18:08 -0400 > On 10/19/2007 06:03 PM, Jeff Garzik wrote: > >> [jgarzik@...tzel misc-2.6]$ strace -p8484 > >> Process 8484 attached - interrupt to quit > > [sits there, chewing up CPU grepping a 47-line header file] > > > > And sysrq-p is pretty useless unless you can force the keyboard > interrupt and the spinning process onto the same CPU. Yes, I find this a painful limitation too. Sparc64 used to dump the registers on all active cpus for show_regs() via a cross-call, and this was incredibly useful. But I disabled that as soon as I started playing with Niagara because at 32 cpus and larger the output is just too voluminous to be useful. What might be appropriate is just to get a one-line program counter dump on every cpu via some new sysrq keystroke. - 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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