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

[Stefan Priebe]

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.

I've no idea about setting breakpoints and analyse what happens... no C 
coder just perl. I can for sure modify code and compile... but i don't 
know how todo that.

Greets,
Stefan