Re: [Qemu-devel] scsi-hd with discard_granularity and unmap results in Aborted Commands

[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