linux-kernel - Re: [GIT PULL] Block drivers for 3.3-rc

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Message-ID: <20120115124405.GA7389@infradead.org>
Date:	Sun, 15 Jan 2012 07:44:05 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Sam Bradshaw (sbradshaw)" <sbradshaw@...ron.com>
Subject: Re: [GIT PULL] Block drivers for 3.3-rc

On Sun, Jan 15, 2012 at 01:22:05PM +0100, Jens Axboe wrote:
> Good point, I had forgotten about the ordered writes, I believe the rest
> of the items have been handled. The driver/hw, as it stands, does not
> reorder writes and it doesn't have a write back cache. So it should
> actually be safe. Any acked write is stable. Sam, correct me if I'm
> wrong.

I tried to get that out of the micron folks a while ago but don't
remember getting an answer.  If that's actually tree please remove
the (misnamed) barrier argument from mtip_hw_submit_io, and maybe add
a comment that the current hardware can't have a volatile write cache.

Btw, does the hardware claim to have writeback caches in the ATA
IDENTIFY words related to it?
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