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[Xen-devel] [PATCH] fix event channel notification loss on IA64

To: xen-devel@xxxxxxxxxxxxxxxxxxx
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
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

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

Attachment: 10521:d128d12ca992_memory_barrier_evtchn_do_upcall.patch
Description: Text document

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