linux-kernel - Re: [patch 2/2] sata_via: Delay on vt6420 when starting ATAPI DMA write

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Message-ID: <7eb6a4d81001200243k7ca637cco25d319a43edf86f5@mail.gmail.com>
Date:	Wed, 20 Jan 2010 11:43:17 +0100
From:	Bart Hartgers <bart.hartgers@...il.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Robert Hancock <hancockrwd@...il.com>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jgarzik@...ox.com>,
	linux-ide@...r.kernel.org, juergen.metzdorf@...elev-dsl.de,
	markpschool@...mail.com, sporadic.crash@...il.com, apopov@...ma.bg,
	david@...mber.co.za, jay4mail@...il.com
Subject: Re: [patch 2/2] sata_via: Delay on vt6420 when starting ATAPI DMA 
	write

Hi,

2010/1/20 Tejun Heo <htejun@...il.com>:
> Hello,
>
> On 01/20/2010 03:33 PM, Bart Hartgers wrote:
>> Well, the ata_sff_pause actually does a ndelay(400), and with today's
>> processors that would be a 'slow path', right?
>
> unlikely() is used to mark very unlikely paths not the slow ones and I
> don't really think DMA_TO_DEVICE would qualify as an unlikely path.
>

Ok, I am convinced; I'll drop the unlikely.

Groeten,
Bart

> Thanks.
>
> --
> tejun
>



-- 
Bart Hartgers - New e-mail: bart.hartgers@...il.com
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