> > for f in /sys/block/*/queue/scheduler; do > > echo noop > $f > > echo $f "$(cat $f)" > > done > > OK, I did this. Two questions: It doesn't seem to have helped or hindered. I still get halts, but under moderate loads not every time. > > Leslie: I still think finding out what the kernel is doing during the > > stall would be a HUGE hint to the problem. Did you look into oprofile or > > ftrace? > > I couldn't find a Debian source for ftrace, but I did download oprofile. Something very disturbing is happening now, however. Just a few minutes after loading oprofile, the system did a sudden total shutdown. The file systems were all left dirty, and power was suddenly cut to the main chassis. This has never happened before. I rebooted the system, and the file systems replayed their journals. Some data was lost, of course, but nothing serious. A few hours later, the exact same thing happened again: A sudden shut-down. Nothing like this has ever happened before. Of course the system can issue a power shutdown from software, but it is supposed to clean up the file systems first, and it's not supposed to just do it autonomously. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
