On Dec 21, 2007 7:38 AM, Christian Hammers <[EMAIL PROTECTED]> wrote: > Hello > > Occasionally all my apache2 processes hang in "D" process status where they > are > no longer responsible to SIGKILL which makes the server almost un-rebootable. > The processes usually vanish after about 15-30min. > > I know that this usually means "I/O wait" somewhere deep inside a kernel > function where signals are not handled. > > But using "strace -p <pid>" I can only see that the last called function is > flock() (according to /proc/<pid>/fd somebody produced a deadlock when using > PHP sessions). But flock() normally terminates on SIGTERM and SIGKILL. > > Could it be a problem with my SCSI driver who's involed in the flock process? > The problem usually occurs on two other webserver at the same time, one using > the same hardware and one being a Dell 6850 with Dell PERC RAID, though. > > How can I get further debugging information that could give me a hint?
Do an echo t >/proc/sysrq-trigger and see what it shows. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/