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[Xen-devel] vbd transfer limits
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] vbd transfer limits |
| From: | "James Harper" <james.harper@xxxxxxxxxxxxxxxx> |
| Date: | Fri, 14 Jan 2011 09:51:39 +1100 |
| Delivery-date: | Thu, 13 Jan 2011 14:52:33 -0800 |
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| Thread-index: | AcuzdHCbuMoX7PhGSQqC2yJ24c5V+Q== |
| Thread-topic: | vbd transfer limits |
GPLPV provides access to vbd devices via scsiport. I'm writing a storport driver now to resolve a couple of limitations under 2008 and newer, and one of the notes says that a storport driver should support buffers >64KB, but the vbd interface only supports a maximum of 40KB (10 * 4KB) bytes per transfer. If it turns out that this limit is a problem I will need to break each windows SRB into multiple ring requests. As long as I honour any write barrier requests from Windows, can anyone see any problems with this? Thanks James _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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