Hi Paolo,
Am 06.11.2012 23:42, schrieb Paolo Bonzini:
i wantes to use scsi unmap with rbd. rbd documention says you need to
set discard_granularity=512 for the device. I'm using qemu 1.2.
If i set this and send an UNMAP command i get this kernel output:
The discard request is failing. Please check why with a breakpoint on
rbd_aio_discard_wrapper or scsi_handle_rw_error for example.
Paolo
I'm sorry the discard requests aren't failing. Qemu / Block driver
starts to cancel a bunch of requests.
[ 39.577194] sd 2:0:0:1: [sdb]
[ 39.577194] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 39.577194] sd 2:0:0:1: [sdb]
[ 39.577194] Sense Key : Aborted Command [current]
[ 39.577194] sd 2:0:0:1: [sdb]
[ 39.577194] Add. Sense: I/O process terminated
[ 39.577194] sd 2:0:0:1: [sdb] CDB:
[ 39.577194] Write same(16): 93 08 00 00 00 00 04 7f ff f7 00 62 00 09
00 00
[ 39.577194] end_request: I/O error, dev sdb, sector 75497463
Greets,
Stefan
