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Date: Thu, 20 Jan 2011 17:12:46 +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 10:53:52AM -0800, Jeremy Fitzhardinge wrote: > > The reason for wanting this should be clear I guess, it allows PI. > > Well, if we can expand the spinlock to include an owner, then all this > becomes moot... How so? Having an owner will not eliminate the need for pv-ticketlocks afaict. We still need a mechanism to reduce latency in scheduling the next thread-in-waiting, which is achieved by your patches. - 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/
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