linux-kernel - Re: Proposal: make RAID6 code optional

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Message-ID: <49EE00F9.6090000@zytor.com>
Date:	Tue, 21 Apr 2009 10:23:05 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Bill Davidsen <davidsen@....com>
CC:	Matti Aarnio <matti.aarnio@...iler.org>,
	Jesper Juhl <jj@...osbits.net>,
	Prakash Punnoor <prakash@...noor.de>,
	Michael Tokarev <mjt@....msk.ru>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, neilb@...e.de
Subject: Re: Proposal: make RAID6 code optional

Bill Davidsen wrote:
> It would seem that that space could be allocated and populated when
> raid6 was first used, as part of the initialization. I haven't looked at
> that code since it was new, so I might be optimistic about doing it that
> way.

We could use vmalloc() and generate the tables at initialization time.
However, having a separate module which exports the raid6 declaration
and uses the raid5 module as a subroutine library seems easier.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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