Displaying 5 results from an estimated 5 matches for "pause_count".
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2011 Nov 08
48
Need help with fixing the Xen waitqueue feature
The patch ''mem_event: use wait queue when ring is full'' I just sent out
makes use of the waitqueue feature. There are two issues I get with the
change applied:
I think I got the logic right, and in my testing vcpu->pause_count drops
to zero in p2m_mem_paging_resume(). But for some reason the vcpu does
not make progress after the first wakeup. In my debugging there is one
wakeup, the ring is still full, but further wakeups dont happen.
The fully decoded xentrace output may provide some hints about the
underlying issue. Bu...
2007 Jun 27
1
[PATCH 7/10] SMP support to Xen PM
...u_user_regs *regs;
+
+ pmprintk(XENLOG_DEBUG, "In pm_softirq\n");
+ /* only cpu0 handles this irq for now */
+ if (cpu != 0)
+ return;
+
+ pmprintk(XENLOG_DEBUG, "handled by cpu0\n");
+ /* Wait vcpu0/dom0 to be paused */
+ while ( !atomic_read(&v->pause_count) )
+ cpu_relax();
+
+ /* Then wait for context of vcpu/dom0 to be sync-ed */
+ while ( test_bit(_VPF_need_sync, &v->pause_flags) )
+ cpu_relax();
+
+ pmprintk(XENLOG_INFO, "vcpu0/dom0 has been paused\n");
+
+ /* now safe to suspend whole system from cpu 0...
2007 Jun 27
10
[PATCH 6/10] Allow vcpu to pause self
...pause, but also
+ * as hint for other cpu waiting for this pause.
+ */
+void vcpu_pause_self(void)
+{
+ struct vcpu *v = current;
+
+ set_bit(_VPF_need_sync, &v->pause_flags);
+ vcpu_pause_nosync(v);
+}
+
void vcpu_unpause(struct vcpu *v)
{
if ( atomic_dec_and_test(&v->pause_count) )
diff -r d5315422dbc8 xen/common/schedule.c
--- a/xen/common/schedule.c Mon May 14 18:35:31 2007 -0400
+++ b/xen/common/schedule.c Mon May 14 18:54:28 2007 -0400
@@ -691,6 +691,13 @@ void context_saved(struct vcpu *prev)
if ( unlikely(test_bit(_VPF_migrating, &prev->pause_flags)) )...
2012 Dec 12
2
[PATCH v7 1/2] xen: unify domain locking in domctl code
These two patches were originally part of the XSM series that I have
posted, and remain prerequisites for that series. However, they are
independent of the XSM changes and are a useful simplification
regardless of the use of XSM.
The Acked-bys on these patches were provided before rebasing them over
the copyback changes in 26268:1b72138bddda, which had minor conflicts
that I resolved.
[PATCH
2013 Jun 26
24
Re: [XenARM] XEN tools for ARM with Virtualization Extensions
(moving to xen-devel, xen-arm is for the older PV ARM port)
On Tue, 2013-06-25 at 23:59 +0000, Eric Trudeau wrote:
> Hi, I am trying to build the XEN tools for our port of XEN to our
> Cortex A15-based platform.
>
> I am using the repo at git://xenbits.xenproject.org/xen.git to
> cross-compile the tools into our rootfs.
Which branch/changeset are you using?
I've heard that