linux-kernel - Re: PATA IDE is slower in newer versions of kernel

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Message-ID: <20100919015903.49606426@lxorguk.ukuu.org.uk>
Date:	Sun, 19 Sep 2010 01:59:03 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Joshua Hintze" <joshh@...ar.com>
Cc:	<linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>
Subject: Re: PATA IDE is slower in newer versions of kernel

> I'm dedicated to continue working on the problem, I just need to advice from the linux community. I've tried different I/O schedulers such as noop and anticipatory and I'm studying the ide-dma code but still lost to where this is happening.

drivers/ide is pretty much obsolete - so what you are seeing is doubly
odd. Most stuff now is using the newer drivers/ata code which can support
SATA, NCQ etc unlike the old codebase.

One thing to check would be whether using the drivers/ata code shows the
same problem.

Alan
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