Re: [PATCH] backing dev unplugging

From: Jens Axboe
Date: Wed Mar 10 2004 - 15:52:57 EST

On Wed, Mar 10 2004, Jesse Barnes wrote:
> On Wed, Mar 10, 2004 at 09:20:25PM +0100, Jens Axboe wrote:
> > It'll be hard to apply the patch against anything but -mm, since it
> > builds (or at least will conflict with) other changes in there. I
> > deliberately made a -mm version this time though I usually make -linus
> > and adapt if necessary, for Andrew to get some testing on this.
> I tried applying to a BK tree (that was fresh as of a couple of hours
> ago), and ignored the dm related changes, and it seemed to work ok after
> I fixed up rejects in direct-io.c and blkdev.h (which didn't seem hard,
> unless I'm missing something):
> 10 qla2200 fc controllers, 64 cpus, 112 disks
> stock BK tree: ~43945 I/Os per second
> w/Jens' patch: ~47149 I/Os per second

Do you have a profile for both runs (what was the work load, btw)?

Jens Axboe

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at