On Fri, Dec 21 2001, rwhron@earthlink.net wrote:
> On Fri, Dec 21, 2001 at 06:01:56PM +0100, Jens Axboe wrote:
> > Thanks -- could you also try and do sysrq-t back traces when it seems
> > stuck?
> >
> > Does a non-highmem kernel run ok?
> >
> > --
> > Jens Axboe
>
> I recompiled with highmem turned off.
> # CONFIG_HIGHMEM4G is not set
> # CONFIG_HIGHMEM64G is not set
>
> I run a scripty that executes dbench 32, then dbench 128.
Ok, please try something for me. In drivers/block/elevator.c, comment
out this block:
if (q->last_merge) {
__rq = list_entry_rq(q->last_merge);
BUG_ON(__rq->flags & REQ_STARTED);
if ((ret = elv_try_merge(__rq, bio))) {
*req = __rq;
return ret;
}
}
(just #if 0 the entire thing) -- the one inside elevator_linus_merge()
Loop back highmem issue is different, I'll take a look at that later.
I'll be pretty unresponsive over christmas, though.
-- Jens Axboe- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.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 : Sun Dec 23 2001 - 21:00:26 EST