> > After testing this for a while, I'm quite sure there's some kind of bug
> > that locks up I/O under heavy traffic.
> there's definitely no problem with heavy load on one stream,
> or with multistream load and default readahead settings.
> (I certianly have tested the former, and the latter is tested
> by all the dbench scores you see here). I'm guessing you'd
> see no lockup if you removed the readahead. though it's also worth
> asking: have you memtest86's the cpu/ram? and can you cause the
> lock with single-threaded bonnie? also, do you have highmem on?
I have highmem turned off.
By using default readahead (124), starting the 50 streams, killing them,
and restarting them, I reproduced the problem. I rebooted the server
I haven't memtest86'd the hardware, but I will. I still beleive this is an
OS problem - not hardware
-- Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA
Computers are like air conditioners. They stop working when you open Windows.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to firstname.lastname@example.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:26 EST