From: Goswin von Brederlow <goswin-v-b@web.de>
To: Andre Noll <maan@systemlinux.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Bill Davidsen <davidsen@tmr.com>,
Matti Aarnio <matti.aarnio@zmailer.org>,
Jesper Juhl <jj@chaosbits.net>,
Prakash Punnoor <prakash@punnoor.de>,
Michael Tokarev <mjt@tls.msk.ru>,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
neilb@suse.de
Subject: Re: Proposal: make RAID6 code optional
Date: Wed, 22 Apr 2009 20:31:13 +0200 [thread overview]
Message-ID: <87vdowlevi.fsf@frosties.localdomain> (raw)
In-Reply-To: <20090422180051.GD13280@skl-net.de> (Andre Noll's message of "Wed, 22 Apr 2009 20:00:51 +0200")
Andre Noll <maan@systemlinux.org> writes:
> On 10:23, H. Peter Anvin wrote:
>
>> 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.
>
> Really? Easier than keeping only two 256-byte arrays for exp() and
> log() and use these at runtime to populate the (dynamically allocated)
> 64K GF multiplication table? That seems to be really simple and would
> still shave off 64K of kernel memory for raid5-only users.
>
> Andre
Oh, you mean when the first raid6 device is started and not when the
module is loaded. That would work.
MfG
Goswin
next prev parent reply other threads:[~2009-04-22 18:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-18 7:46 Proposal: make RAID6 code optional Prakash Punnoor
2009-04-18 8:09 ` Michael Tokarev
2009-04-18 9:16 ` Prakash Punnoor
2009-04-18 13:56 ` Jesper Juhl
2009-04-18 14:58 ` Matti Aarnio
2009-04-19 2:07 ` H. Peter Anvin
2009-04-19 2:27 ` NeilBrown
2009-04-19 6:28 ` Neil Brown
2009-04-21 13:58 ` Bill Davidsen
2009-04-21 17:23 ` H. Peter Anvin
2009-04-22 9:01 ` Goswin von Brederlow
2009-04-22 12:34 ` Bill Davidsen
2009-04-22 15:11 ` H. Peter Anvin
2009-04-22 18:00 ` Andre Noll
2009-04-22 18:31 ` Goswin von Brederlow [this message]
2009-04-22 18:50 ` Andre Noll
2009-04-22 18:39 ` H. Peter Anvin
2009-04-22 18:57 ` Andre Noll
2009-04-23 1:35 ` H. Peter Anvin
2009-04-23 8:07 ` Andre Noll
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