linux-kernel - Re: [PATCH/RFC] stop_machine: make stop_machine

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]

Message-ID: <48231518.9010209@goop.org>
Date:	Thu, 08 May 2008 15:58:32 +0100
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Christian Borntraeger <borntraeger@...ibm.com>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	kvm-devel@...ts.sourceforge.net, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH/RFC] stop_machine: make stop_machine_run more virtualization
 friendly

Christian Borntraeger wrote:
> I really like 64 guest cpus as a good testcase for all kind of things. 
>   

Sure, I do the same kind of thing.

>> I think x86 (at least) is now using ticket locks, which is fair.  Which 
>> kernel are you seeing this problem on?
>>     
>
> Sorry, forgot to mention. Its kvm.git from 2 days ago on s390.
>   

And on s390 cpu_relax yields the vcpu?  That's not common behaviour 
across architectures.

    J
--
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/