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RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfront driverimpa
| To: | "Stefan Berger" <stefanb@xxxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfront driverimpacted? |
| From: | "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx> |
| Date: | Sun, 5 Nov 2006 16:44:14 -0000 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Sun, 05 Nov 2006 08:45:11 -0800 |
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| Thread-index: | AccA93bakQ3sskD9QC6OEba8PCLkKgAAN/WQ |
| Thread-topic: | [Xen-devel] Re: Getting rid of xenbus_suspend(): tpmfront driverimpacted? |
The TPM protocol in contrast assumes a > reliable connection from the computer to the device and that all commands > finish correctly and responses are received by the apps *and* that requests > are not resent. How does the block driver handle this? Will the frontend > driver still receive explicit notification of a shutdown? Blkfront remembers un-acknowledged requests and reissues them after a re-connect. It doesn't matter whether the requests have previously been issued or not, as we know there will be no reordering hazards within the request stream, as there are no ordering guarantees. It currently doesn't use the suspend notification. Ian _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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