Re: [Hampshire] kill -9 pid now working
On Tue, 2009-05-12 at 12:43 +0100, James Courtier-Dutton wrote: > Hi, > > I have a system where "kill -9 pid" as root, is not working. > As a result, even the reboot command also does nothing. > > Does anyone know why this might happen? If a program gets caught in uninterruptible sleep, it cannot be killed. I believe that this usually happens when the process is in kernel mode doing waiting on some I/O and killing it at that point would result in an inconsistency. Generally D-sleep shouldn't last long... > renice seems to work, in that reading the new priority shows that the > priority has changed. > > I can remotely connect to the system so it is functioning quite well > up to a point. > "sync" also just hangs. This should not happen. Perhaps some part of the kernel is deadlocked?! If you find out what's gone wrong, you should probably report a kernel bug. Is any part of the filesystem remote? James -- The Holy ettlz theholyet...@googlemail.com PGP key ID: 03F94B5D --- signature.asc Description: This is a digitally signed message part -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
Re: [Hampshire] kill -9 pid now working
--- On Tue, 12/5/09, James Courtier-Dutton wrote: > Hi, > > I have a system where "kill -9 pid" as root, is not > working. > As a result, even the reboot command also does nothing. Sounds like a possible rootkit says paranoia. Are you able to kill processes with signal 9 in 'top' ? Are any commands segfaulting ? * use '> output 2>&1' as STDERR may not be going to where expected. > > Does anyone know why this might happen? > strace is your friend. > renice seems to work, in that reading the new priority > shows that the > priority has changed. > > I can remotely connect to the system so it is functioning > quite well > up to a point. > "sync" also just hangs. You have enough disk space and have fsck'd ? i've seen errornous filesystems report 'no space left' incorrectly, this had a knock on effect to many programs producing un-expected results. > > "dmesg" shows nothing wrong with the system. I.e. no stack > traces, or > HD sector errors. > > Any ideas? Isaac. -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
[Hampshire] kill -9 pid now working
Hi, I have a system where "kill -9 pid" as root, is not working. As a result, even the reboot command also does nothing. Does anyone know why this might happen? renice seems to work, in that reading the new priority shows that the priority has changed. I can remotely connect to the system so it is functioning quite well up to a point. "sync" also just hangs. "dmesg" shows nothing wrong with the system. I.e. no stack traces, or HD sector errors. Any ideas? -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --
