Andi Kleen wrote:
Andi Kleen <ak@xxxxxxx> writes:
I tested it on a NF4-Professional system with 8GB RAM and a single
SATA disk. It first did nicely in LTP and some other tests,
but during a bonnie++ run it eventually blocked with all
IO hanging forever. No output either. I did a full backtrace
and it just showed the processes waiting for a IO wakeup.
Hmm, to follow myself up: after a few more minutes the machine recovered
and i could log in again (overall the stall was at least 5+ minutes
though)
Not sure whom to blame, the IO driver might be actually innocent
and it just be one of the usual known but unfixed IO starvation problems.
-Andi
Hmm.. The system hanging up for 5 minutes and then recovering seems
rather odd, as far as I know the timeouts in libata are all quite a bit
shorter than that. Was there anything unusual in dmesg? If the IO
commands weren't completing at the driver level then I would expect the
error handling to kick in in some fashion..
--
Robert Hancock Saskatoon, SK, Canada
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