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Date: Sat, 4 Apr 2009 16:24:21 -0600 From: "Trenton D. Adams" <trenton.d.adams@...il.com> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: IO latency - a special case (futex hangs for an hour) Here's some more output. I wasn't able to get vmstat going before it happened this time, as it completely locked up the machine. I hit Ctrl-C several times, and eventually, after nearly an hour hanging on futex, the Ctrl-C took effect, and killed it... strace -T -e trace=futex -o strace3.txt mvn install futex(0x7fff7f14ab1c, FUTEX_WAKE_PRIVATE, 1) = 0 <0.000016> futex(0x7fff260d6a3c, FUTEX_WAKE_PRIVATE, 1) = 0 <0.000014> futex(0x7f941dca310c, FUTEX_WAKE_PRIVATE, 2147483647) = 0 <0.000014> futex(0x414169e0, FUTEX_WAIT, 27400, NULL) = ? ERESTARTSYS (To be restarted) <3206.324673> --- SIGINT (Interrupt) @ 0 (0) --- futex(0x7f941d722f40, FUTEX_WAKE_PRIVATE, 1) = 1 <0.000030> futex(0x414169e0, FUTEX_WAIT, 27400, NULL <unfinished ... exit status 130> Yes, the kernel is well hung. :P It appears to be similar to this guy's issue... http://lkml.org/lkml/2004/10/3/35 -- 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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