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Re: [Xen-devel] LTTng-Xen Buffer shared between the hypervisor and a dom
| To: | Mathieu Desnoyers <compudj@xxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] LTTng-Xen Buffer shared between the hypervisor and a dom0 process |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Fri, 09 Mar 2007 09:11:21 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 09 Mar 2007 01:10:38 -0800 |
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| In-reply-to: | <20070308193025.GA20510@Krystal> |
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| Thread-index: | AcdiKuctJc6a8s4eEduPNwAX8io7RQ== |
| Thread-topic: | [Xen-devel] LTTng-Xen Buffer shared between the hypervisor and a dom0 process |
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On 8/3/07 19:30, "Mathieu Desnoyers" <compudj@xxxxxxxxxxxxxxxxxx> wrote: > lttctl-xen -r (finalize buffers, signal lttd-xen, decrement refcount) > (lttd-xen : writes the last subbuffers. decrement refcount, ressources are > freed) > > If no lttd-xen is mapping the buffers, we simply free then upon > lttctl-xen -r. Okay, I get you. But what should happen if someone *is* mapping the buffers when lttctl-xen -r is invoked? Is that an error condition, or is the implementation supposed to reap the buffers 'as soon as possible' (i.e., when the last mapping goes away)? Actually I think we can support either way, although the former will work right now and the latter will need a bit of extra support added into Xen. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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