Re: zombie processes waiting for a lock, smth to worry about?

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>]

:..
:>     Well, fstat can seg-fault trying to access kernel memory.  The
:>     question is why aren't these zombies being reaped by their parent.
:> 
:>     If you generate a kernel core dump with the system in this state
:>     and upload it to leaf I'll try to track it down.
:Matt suggested turning off the mpsafe sysctl's (they're turned off by
:default) and this worked, no more zombie processes, no more strange
:netstat -m output, no systat -ifstat errors

    Right.  The mpsafe sysctls are experimental.  I put them in there so
    we could start identifying areas that need work, and we've identified
    probably half a dozen issues so far.  They aren't turned on by default
    and so will not effect the release.  The areas in question, along with
    other goodies, are going to be worked on after the release.

    In the case of fstat the issue is simply the process p_lock counter
    being accessed without appropriate MP protection.

					-Matt
					Matthew Dillon 
					<dillon@xxxxxxxxxxxxx>