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Re: FS locks


On Sat, Sep 22, 2001 at 10:12:55PM +0200, Eduard Bloch wrote:
> unfortunately I got some trouble using ext3 - the system hangs when
> working in a certain directory. Not completely, I can switch between
> consoles and reboot with SysRQ, but cannot do anything which requires
> disk IO: not start any applications, not umount, nothing. I could send
> the strace output, but I don't think this would help anyone. Sorry, but
> I don't have a clue where to start debugging. There are no
> debugging messages on my syslog console in the time of the freeze when I
> compile with JBD and enable via 1>/proc/sys/fs/jbd-debug.
> The filesystem seems to be clean, e2fsck passes without errors. Please
> let me know if (and how) I could help on debugging a such problem.

The real question is, where are the processes stuck?  Can you set up a
serial console?  If so, please enable magic-sysrq and try to capture
an alt-sysrq-T trace to find out where all the processes are blocked.
That, with the System.map, will give us somewhere to start looking.


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