Re: Report in downstream Debian: mpt3sas broken with xen dom0 with update to 5.10.149 in 5.10.y.

[Salvatore Bonaccorso]

Hi Andrew,

On Tue, Mar 14, 2023 at 11:41:08AM +0000, Andrew Cooper wrote:
> On 14/03/2023 11:23 am, Juergen Gross wrote:
> > On 14.03.23 12:17, Joost Roeleveld wrote:
> >>> On Mon, Oct 24, 2022 at 05:28:05PM +0000, Andrew Cooper wrote:
> >>>> I don't know exactly how this translates to Linux internals, but most
> >>>> devices are fine and it's routinely the mpt2/3sas drivers which
> >>>> encounter problems.  It would be lovely if we could get to the
> >>>> bottom of
> >>>> this for once and for all.
> >>>
> >>> So to summarize my two mails: I think te use of dma_get_required_mask
> >>> in mpt3sas is wrong, and the dma_get_required_mask return value from
> >>> xen-swiotlb is also wrong. Fixing either one should fix this problem,
> >>> and I think we should fix both.
> >>
> >> Hi all,
> >>
> >> Is there anything that can be done to get this fixed in xen and the
> >> kernel somehow?
> >> I keep having to manually patch the mpt3sas driver to prevent it from
> >> being able to switch to 32bit mode each time I upgrade the kernel.
> >
> > Just use 5.10.173.
> 
> Its still broken even in 6.1
> 
> We've just stumbled over this yet again in XenServer.

The mentioned commit has been backported to 6.1.16, 5.15.100 and
5.10.173. Is the issue still reproducible with 6.1.16?

Regards,
Salvatore