netdev - Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33

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]

Message-ID: <20091222162110.GG10314@basil.fritz.box>
Date:	Tue, 22 Dec 2009 17:21:10 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Anthony Liguori <anthony@...emonkey.ws>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Gregory Haskins <gregory.haskins@...il.com>,
	Avi Kivity <avi@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	kvm@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org,
	"alacrityvm-devel@...ts.sourceforge.net" 
	<alacrityvm-devel@...ts.sourceforge.net>
Subject: Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33

> So far, the only actual technical advantage I've seen is that vbus avoids 
> EOI exits.  

The technical advantage is that it's significantly faster today.

Maybe your proposed alternative is as fast, or maybe it's not. Who knows?

> We think we understand why vbus does better than the current userspace 
> virtio backend.  That's why we're building vhost-net.  It's not done yet, 
> but our expectation is that it will do just as well if not better.

That's the vapourware vs working code disconnect I mentioned. One side has hard
numbers&working code and the other has expectations. I usually find it sad when the
vapourware holds up the working code.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html