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[PULL,18/24] KVM: PPC: Book3S HV: Increase timeout for grabbing secondary threads

Message ID 1411591418-56061-19-git-send-email-agraf@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Alexander Graf Sept. 24, 2014, 8:43 p.m. UTC 
From: Paul Mackerras <paulus@au1.ibm.com>

Occasional failures have been seen with split-core mode and migration
where the message "KVM: couldn't grab cpu" appears.  This increases
the length of time that we wait from 1ms to 10ms, which seems to
work around the issue.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/book3s_hv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 27cced9..4526bef 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1489,7 +1489,7 @@  static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
 static int kvmppc_grab_hwthread(int cpu)
 {
 	struct paca_struct *tpaca;
-	long timeout = 1000;
+	long timeout = 10000;
 
 	tpaca = &paca[cpu];