Re: Xen 4.20 release schedule

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 21/10/2024 1:02 pm, oleksii.kurochko@xxxxxxxxx wrote:
> Hello everyone,
>
> As there were no objections to the proposed release schedule
> (https://lore.kernel.org/xen-devel/CAMacjJxEi6PThwH2=NwG3He8eQn39aiaxZCw3bQF7i4YcmjuNw@xxxxxxxxxxxxxx/
> ), I've updated the wiki with the schedule for Xen 4.20 release
> (https://wiki.xenproject.org/wiki/Xen_Project_X.YY_Release_Notes), and
> it is now accessible from
> https://xenbits.xen.org/docs/unstable-staging/support-matrix.html.

I have a blocker to raise (against myself...) and no good idea of how to
proceed.

The for_each_bit work has a unexpected bug.

    for_each_bit ( ... )
    {
        if ( ... )
            break;
    }

will fall into an infinite loop.  This is caused by for_each_bit()
hiding a double for() loop, in order to declare two scope-local
variables of different types.

The two variables are one copy of the source expression (really quite
important to keep), and one unsigned int iterator (improved optimisation
capability by not using a wider-scope variable).

Options are (off the top of my head)

1) Always take the iterator from outer scope
2) Iterator always the same type as the source expression
3) Figure out some way of expressing "once" in the outer loop

Or anything else that I've missed.

~Andrew