 Home |
Products |
Support |
Community |
News |
xen-devel
Re: [Xen-devel] evtchn_do_upcall() barrier between upcall_pending and pe
| To: | Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] evtchn_do_upcall() barrier between upcall_pending and pending_sel |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 08 May 2008 11:25:59 +0100 |
| Delivery-date: | Thu, 08 May 2008 03:26:35 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxx |
| In-reply-to: | <20080508101829.GC4365@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| Thread-index: | Aciw9eg/JpRA4BzpEd28OwAX8io7RQ== |
| Thread-topic: | [Xen-devel] evtchn_do_upcall() barrier between upcall_pending and pending_sel |
| User-agent: | Microsoft-Entourage/11.4.0.080122 |
Makes sense, yes. -- Keir On 8/5/08 11:18, "Samuel Thibault" <samuel.thibault@xxxxxxxxxxxxx> wrote: > Hello, > > In evtchn_do_upcall() there is a barrier between setting upcall_pending > and pending_sel, which makes sense to avoid losing events, however I > don't understand why it is a rmb(). memory-barriers.txt says that rmb() > only provides ordering of reads, not stores. Shouldn't that be a wmb() > instead then? > > Samuel > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: [Xen-devel] [Patch 4/4]: Xend interface for HVM S3, Keir Fraser |
|---|---|
| Next by Date: | [Xen-devel] [PATCH] minios: clear the event before calling the handler, Samuel Thibault |
| Previous by Thread: | [Xen-devel] evtchn_do_upcall() barrier between upcall_pending and pending_sel, Samuel Thibault |
| Next by Thread: | Re: [Xen-devel] evtchn_do_upcall() barrier between upcall_pending and pending_sel, Samuel Thibault |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
