linux-kernel - Re: [PATCH RFC V6 0/11] Paravirtualized ticketlocks

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, 02 Apr 2012 17:45:27 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Avi Kivity <avi@...hat.com>, "H. Peter Anvin" <hpa@...or.com>
CC:	Alan Meadows <alan.meadows@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	KVM <kvm@...r.kernel.org>, Andi Kleen <andi@...stfloor.org>,
	Xen Devel <xen-devel@...ts.xensource.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Virtualization <virtualization@...ts.linux-foundation.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Stephan Diestelhorst <stephan.diestelhorst@....com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Attilio Rao <attilio.rao@...rix.com>
Subject: Re: [PATCH RFC V6 0/11] Paravirtualized ticketlocks

On 04/02/2012 03:21 PM, Raghavendra K T wrote:
> On 04/01/2012 07:23 PM, Avi Kivity wrote:
>  > On 04/01/2012 04:48 PM, Raghavendra K T wrote:
>  >>>> I have patch something like below in mind to try:
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 5127668..3fa912a 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -1557,12 +1557,17 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
> mark_page_dirty_in_slot(kvm, memslot, gfn);
> }
>
> +#define YIELD_THRESHOLD 2048
> +static void kvm_vcpu_try_yield_to(struct kvm_vcpu *me);
> /*
> * The vCPU has executed a HLT instruction with in-kernel mode enabled.
> */
> void kvm_vcpu_block(struct kvm_vcpu *vcpu)
> {
[...]
> + if (loop_count++ % YIELD_THRESHOLD)
> + schedule();
> + else
> + kvm_vcpu_try_yield_to(vcpu);
> }
>
> +static void kvm_vcpu_try_yield(struct kvm_vcpu *me)

yes, it is kvm_vcpu_try_yield_to. had changed the name just before
sending. sorry.

--
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/