Re: Re: [sqlsmith] FailedAssertion("!(XLogCtl->Insert.exclusiveBackup)", File: "xlog.c", Line: 10200)

On Mon, Aug 22, 2016 at 10:43 AM, Michael Paquier
<michael(dot)paquier(at)gmail(dot)com> wrote:
> On Sat, Aug 6, 2016 at 6:35 PM, Andreas Seltenreich <seltenreich(at)gmx(dot)de> wrote:
>> Michael Paquier writes:
>>
>>> Andreas, with the patch attached is the assertion still triggered?
>>> [2. text/x-diff; base-backup-crash-v2.patch]
>>
>> I didn't observe the crashes since applying this patch. There should
>> have been about five by the amount of fuzzing done.
>
> I have reworked the patch, replacing those two booleans with a single
> enum. That's definitely clearer. Also, I have added this patch to the
> CF to not lose track of it:
> https://commitfest.postgresql.org/10/731/
> Horiguchi-san, I have added you as a reviewer as you provided some
> input. I hope you don't mind.

You seem to add another entry for this patch into CommitFest.
Either of them needs to be removed.
https://commitfest.postgresql.org/10/698/

This patch prevents pg_stop_backup from starting while pg_start_backup
is running. OTOH, we also should prevent pg_start_backup from starting
until "previous" pg_stop_backup has completed? What happens if
pg_start_backup starts while pg_stop_backup is running?
As far as I read the current code, ISTM that there is no need to do that,
but it's better to do the double check.

Regards,

--
Fujii Masao