Re: Correct comment in StartupXLOG().

On Thu, Feb 4, 2021 at 6:18 AM Kyotaro Horiguchi
<horikyota(dot)ntt(at)gmail(dot)com> wrote:
>
> At Wed, 3 Feb 2021 16:36:13 +0530, Amul Sul <sulamul(at)gmail(dot)com> wrote in
> > On Wed, Feb 3, 2021 at 2:48 PM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> > >
> > > On Wed, Feb 3, 2021 at 2:28 PM Amul Sul <sulamul(at)gmail(dot)com> wrote:
> > > >
> > > > Hi,
> > > >
> > > > SharedRecoveryState member of XLogCtl is no longer a boolean flag, got changes
> > > > in 4e87c4836ab9 to enum but, comment referring to it still referred as the
> > > > boolean flag which is pretty confusing and incorrect.
> > >
> > > +1 for the comment change
>
> Actually the "flag" has been changed to an integer (emnum), so it
> needs a change. However, the current proposal:
>
> * Now allow backends to write WAL and update the control file status in
> - * consequence. The boolean flag allowing backends to write WAL is
> + * consequence. The recovery state allowing backends to write WAL is
> * updated while holding ControlFileLock to prevent other backends to look
>
> Looks somewhat strange. The old booean had a single task to allow
> backends to write WAL but the current state has multple states that
> controls recovery progress. So I thnink it needs a further change.
>
> ===
> Now allow backends to write WAL and update the control file status in
> consequence. The recovery state is updated to allow backends to write
> WAL, while holding ControlFileLock to prevent other backends to look
> at an inconsistent state of the control file in shared memory.
> ===
>

This looks more accurate, added the same in the attached version. Thanks for the
correction.

Regards,
Amul