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[Xen-devel] [PATCH] fix event channel notification loss on IA64
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] fix event channel notification loss on IA64 |
| From: | Isaku Yamahata <yamahata@xxxxxxxxxxxxx> |
| Date: | Thu, 29 Jun 2006 14:43:05 +0900 |
| Cc: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 28 Jun 2006 22:43:44 -0700 |
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| User-agent: | Mutt/1.4.2.1i |
evtchn_do_upcall() has a micro optimization which is depends on that xchg is a barrier. However xchg of IA64 has acquire semantics so that event channel notification is lost sometimes. This patch fixes it. -- yamahata
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