Conversation with #inferno at Sat Dec 29 19:11:47 2012 on powerman@irc.freenode.net (irc)
(19:13:59) powerman: looks like it's linux kernel bug. I've stopped nearly all processes on my system, and loadavg was still about 350 and slowly decreasing. also, I notice about 5-10 processes can't be killed - even with kill -9.
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(21:41:45) yshurik: powerman: zombies?
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(02:08:24) leetspete: powerman: Uninterruptible sleep?  I have that issue with Linux.
(02:09:22) leetspete: Especially with network stuff.  Seems semi-random, when a network socket closes and the process is blocked sending/receiving and isn't alerted that it's closed.
(02:20:05) powerman: leetspete: yeah, I think this is more probable than zombies. I've attached to these processes using strace (and I don't think it's possible with zombies) - it show nothing and also hangs - I've killed it using only -9
(02:24:05) leetspete: powerman: Okay, then that's the same thing I've gotten.  strace/gdb both hang.
(02:25:35) leetspete: The good news is that although they increase the load average, they don't consume any actual CPU.
(02:26:10) leetspete: But it's annoying as hell.  And if they were listening on a socket, there's no way to get it back; you've got to pick another port.
(02:51:21) powerman: leetspete: you think it's related to inferno in any way, or just some general linux bug?
(02:52:17) leetspete: powerman: I usually don't get it in Inferno.
(02:52:39) leetspete: But I've gotten it usually with network stuff, always with I/O.
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