linux-kernel - Re: Unable to continue testing of 2.6.25

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 18 Feb 2008 09:32:15 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Frans Pop <elendil@...net.nl>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Unable to continue testing of 2.6.25

On Mon, 18 Feb 2008 18:11:59 +0100
Andi Kleen <andi@...stfloor.org> wrote:
> > to do is go via an intermediate UC state and the really expensive
> > process from the manual is not needed.
> 
> Ok then you're proposing to use a even more expensive operation just
> to patch this over. I guess that will work as long as we assume
> none of the callers cares too much about performance, 

I've yet to see a user who wants WC. Lets face it, WC *sucks*. This is why
the folks who care about performance (the graphics guys) stopped using it.
WC is slow, and on modern cpus leads to really bad performance. I'm really
half tempted to just ignore WC entirely and suggest that we don't even implement
it in the kernel. Yes it's really that bad.


-- 
If you want to reach me at my work email, use arjan@...ux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/