linux-kernel - Re: [PATCH RFC] kvm: x86: add halt

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:	Thu, 05 Feb 2015 20:18:40 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Radim Krčmář <rkrcmar@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org, riel@...hat.com,
	mtosatti@...hat.com
Subject: Re: [PATCH RFC] kvm: x86: add halt_poll module parameter



On 05/02/2015 18:53, Radim Krčmář wrote:
> >            99% of what you get if you use idle=poll in the guest.
> 
> (Hm, I would have thought that this can outperform idle=poll ...)

It outperforms idle=poll in the host.  A vmexit is probably too cheap to
outperform having idle=poll in the guest.

Paolo
--
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/