mb/ext3@dcs.qmul.ac.uk wrote:
>
> Smaller journals may well be the way to go on hardware RAID systems.
> Looking at (and listening to :) the array we have, I don't think it can
> lose us too much throughput in our case. Next crash I'll give it a go :-/
>
OK. While you're there you may as well bump up the request queue
length. Around line 1120 or drivers/block/ll_rw_blk.c:
if (total_ram > MB(32))
queue_nr_requests = 128;
Make it 1024. 128 is crazily small. This will help somewhat, not a lot.
