Re: Debugging scsi abort handling ?

Paolo Bonzini
2014-08-25T07:20:48Z

Il 23/08/2014 16:52, Hans de Goede ha scritto:
> Hi All,
>
> Now that the UAS driver is no longer marked as CONFIG_BROKEN,
> I'm getting quite a few bug reports about issues with UAS drives.
>
> One if the issues is that there might be a number of bugs in the
> abort handling path, as I don't think that was ever tested properly.
>
> So I'm wondering is there a way to test the abort path with a real
> drive? E.G. submit some command which is known to take a significant
> amount of time, and then abort it right after submitting ?

You could have some luck with QEMU's UAS emulation. If you set QEMU's
I/O throttling options low enough (e.g. 100KB/sec), and then use dd with
iflag=direct and a largish block size (a few MBs), the guest should
abort its I/O soon enough.

Paolo