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

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Message-ID: <87ljptm59f.fsf@frosties.localdomain>
Date:	Wed, 22 Apr 2009 11:01:16 +0200
From:	Goswin von Brederlow <goswin-v-b@....de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Bill Davidsen <davidsen@....com>,
	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

"H. Peter Anvin" <hpa@...or.com> writes:

> 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

Combine the two.

The raid6 module initializes the tables for raid6 and uses the raid5
module as subroutine library.

MfG
        Goswin
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