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From: | Gerd Hoffmann |
Subject: | Re: [Qemu-devel] [sneak preview] major scsi overhaul |
Date: | Mon, 09 Nov 2009 14:39:24 +0100 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Lightning/1.0pre Thunderbird/3.0b4 |
Hi,
Doesn't fly. Either every SCSI HBA uses QEMUSG64List (thus making this aequivalent to the next option from the scsi point of view), or scsi-disk would have to support both formats.A device or device set which is always 64-bit would always use QEMUSG64List. A device which is always 32-bit would use QEMUSG32List.
A scsi-disk can be connected to both 32-bit and 64-bit HBAs though ...
Question is how big the performance hit actually is and whenever we are willing to accept that or not ...Probably unmeasurable, but the qemu-devel thread size will be very measurable so not worth it.
;) cheers, Gerd
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