0c76f22ef1
- bnc#633573 - System fail to boot after running several warm reboot tests 22749-vtd-workarounds.patch - Upstream patches from Jan 22744-ept-pod-locking.patch 22777-vtd-ats-fixes.patch 22781-pod-hap-logdirty.patch 22782-x86-emul-smsw.patch 22789-i386-no-x2apic.patch 22790-svm-resume-migrate-pirqs.patch 22816-x86-pirq-drop-priv-check.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=94
30 lines
1.0 KiB
Diff
30 lines
1.0 KiB
Diff
Subject: xenpaging: print info when free request slots drop below 2
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Add debugging aid to free request slots in the ring buffer.
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It should not happen that the ring gets full, print info anyway if it happens.
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(xen-unstable changeset: 22439:3bbb3969236c)
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Signed-off-by: Olaf Hering <olaf@aepfle.de>
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---
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xen/arch/x86/mm/mem_event.c | 5 +++++
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1 file changed, 5 insertions(+)
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Index: xen-4.0.2-testing/xen/arch/x86/mm/mem_event.c
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===================================================================
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--- xen-4.0.2-testing.orig/xen/arch/x86/mm/mem_event.c
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+++ xen-4.0.2-testing/xen/arch/x86/mm/mem_event.c
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@@ -152,6 +152,11 @@ int mem_event_check_ring(struct domain *
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mem_event_ring_lock(d);
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free_requests = RING_FREE_REQUESTS(&d->mem_event.front_ring);
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+ if ( unlikely(free_requests < 2) )
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+ {
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+ gdprintk(XENLOG_INFO, "free request slots: %d\n", free_requests);
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+ WARN_ON(free_requests == 0);
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+ }
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ring_full = free_requests < MEM_EVENT_RING_THRESHOLD;
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if ( (curr->domain->domain_id == d->domain_id) && ring_full )
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