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[Xen-devel] Question about using zero-copy for disk I/O in Xen.
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Question about using zero-copy for disk I/O in Xen. |
| From: | "Liang Yang" <multisyncfe991@xxxxxxxxxxx> |
| Date: | Mon, 26 Feb 2007 16:17:26 -0700 |
| Delivery-date: | Mon, 26 Feb 2007 15:16:42 -0800 |
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Hello,I have an impression the zero-copy technology is frequently tied up with network I/O. Recently I found people in Xen community start talking zero-copy for disk I/O as well (e.g. scsi front-end/back-end driver and blktap in Xen). So is there any difference for zero-copy between disk I/O and network I/O? O_DIRECT can be used to eliminate the kernel buffer copy, isn't it counted as part of zero-copy for disk I/O? Thanks, Liang _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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