| 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
| ||
|
Date: Wed, 19 Jan 2011 22:53:07 +0530 From: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com> To: Jeremy Fitzhardinge <jeremy@...p.org> Cc: Peter Zijlstra <peterz@...radead.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Nick Piggin <npiggin@...nel.dk>, Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>, Américo Wang <xiyou.wangcong@...il.com>, Eric Dumazet <dada1@...mosbay.com>, Jan Beulich <JBeulich@...ell.com>, Avi Kivity <avi@...hat.com>, Xen-devel <xen-devel@...ts.xensource.com>, "H. Peter Anvin" <hpa@...or.com>, Linux Virtualization <virtualization@...ts.linux-foundation.org>, Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>, kvm@...r.kernel.org, suzuki@...ibm.com Subject: Re: [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock On Wed, Jan 19, 2011 at 10:42:39PM +0530, Srivatsa Vaddagiri wrote: > Add two hypercalls to KVM hypervisor to support pv-ticketlocks. > > KVM_HC_WAIT_FOR_KICK blocks the calling vcpu until another vcpu kicks it or it > is woken up because of an event like interrupt. One possibility is to extend this hypercall to do a directed yield as well, which needs some more thought. Another issue that needs to be resolved with pv-ticketlocks is the impact on intra-VM fairness. A guest experiencing heavy contention can keep yielding cpu, allowing other VMs to get more time than they deserve. - vatsa -- 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/
Powered by blists - more mailing lists