Re: 2.6.20-rc2+: CFQ halving disk throughput.

Rene Herman
2007-01-01T22:57:46Z

Rene Herman wrote:

> In fact, it's CFQ. The PATA thing was a red herring. 2.6.20-rc2 and 3
> give me ~ 24 MB/s from "hdparm t /dev/hda" while 2.6.20-rc1 and below
> give me ~ 50 MB/s.
>
> Jens: this is due to "[PATCH] cfq-iosched: tighten allow merge
> criteria", 719d34027e1a186e46a3952e8a24bf91ecc33837:

axboe@oracle.com bounces for me. Could one of the other recipients of
parent message try to forward?

Rene.