linux-kernel - Re: [bug] block subsystem related crash with latest -git

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Message-ID: <alpine.LFD.0.999.0710171211370.26902@woody.linux-foundation.org>
Date:	Wed, 17 Oct 2007 12:15:26 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jens Axboe <jens.axboe@...cle.com>
cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [bug] block subsystem related crash with latest -git



On Wed, 17 Oct 2007, Jens Axboe wrote:
> 
> Ah ok, I see why you are confused. The SCSI case is one, it allocs and
> frees the sg table each time. The entries are thus always initialized
> when they end up in blk_rq_map_sg(). However, other drivers allocate one
> at driver init time and use that one all the time. It needs to be
> initially cleared, but it wont be cleared before each request mapping.
> And that is fine, as long as we do clear entries in blk_rq_map_sg().

Ahh, ok, thanks for clearing that up.

			Linus
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