linux-kernel - Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Mon, 7 Nov 2011 08:42:01 +0200 (EET)
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Ted Ts'o <tytso@....edu>
cc:	Pekka Enberg <penberg@...nel.org>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Avi Kivity <avi@...hat.com>,
	"kvm@...r.kernel.org list" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
	qemu-devel Developers <qemu-devel@...gnu.org>,
	Alexander Graf <agraf@...e.de>,
	Blue Swirl <blauwirbel@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test
 kernels

On Sun, 6 Nov 2011, Ted Ts'o wrote:
> The only excuse I can see is a hope to make random changes to the
> kernel and userspace tools without having to worry about compatibility
> problems, which is an argument I've seen with perf (that you have to
> use the same version of perf as the kernel version, which to me is bad
> software engineering).  And that's why I pointed out that you can't do
> that with KVM, since we have out-of-tree userspace users, namely
> qemu-kvm.

I've never heard ABI incompatibility used as an argument for perf. Ingo?

As for the KVM tool, merging has never been about being able to do ABI 
incompatible changes and never will be. I'm still surprised you even 
brought this up because I've always been one to _complain_ about people 
breaking the ABI - not actually breaking it (at least on purpose).

 			Pekka
--
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/