Colin Percival 48a1ceed53 If reading a virtual-device value fails, attempt to read a virtual-device-ext ... value. Some hosts do not publish "extended" disk IDs via virtual-device in an attempt to avoid confusing old blkfront drivers, and without this change we failed to attach such disks. In particular, this commit allows all 24 ephemeral disks on EC2 hs1.8xlarge instances to be used, instead of only the first 15. MFC after: 3 days		2013-08-30 01:46:56 +00:00
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blkfront.c	If reading a virtual-device value fails, attempt to read a virtual-device-ext	2013-08-30 01:46:56 +00:00
block.h	Implement vector callback for PVHVM and unify event channel implementations	2013-08-29 19:52:18 +00:00