Date: Fri, 29 May 2015 09:38:05 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200493] Killing pid 11 (idle) wedges the disk IO Message-ID: <bug-200493-8-POMSOI3qrB@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-200493-8@https.bugs.freebsd.org/bugzilla/> References: <bug-200493-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200493 --- Comment #4 from Edward Tomasz Napierala <trasz@FreeBSD.org> --- The reason I didn't provide more information is that I believed it to be trivially reproducible - and also because I can't tell much about it. That is, everything looks normal: the system is almost idle, vmstat/iostat/top etc don't show anything weird... It's just that "diskinfo -t" shows values orders of magnitude worse than usual. Actually, I've noticed something: idle threads priority. Before: # procstat -t 11 PID TID COMM TDNAME CPU PRI STATE WCHAN 11 100003 idle idle: cpu0 -1 255 run - 11 100004 idle idle: cpu1 1 255 run - # kill -KILL 11 [root@brick:/home/trasz]# procstat -t 11 PID TID COMM TDNAME CPU PRI STATE WCHAN 11 100003 idle idle: cpu0 0 120 run - 11 100004 idle idle: cpu1 -1 255 run - Bumping the idle thread's priority would explain what's happening. But why does it get bumped? -- You are receiving this mail because: You are the assignee for the bug.
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