Re: low wal_retrieve_retry_interval causes missed signals on Windows

Hi,

On 2023-01-11 15:26:45 -0800, Nathan Bossart wrote:
> On Wed, Jan 11, 2023 at 12:48:36PM -0800, Andres Freund wrote:
> > Given that we check for interrupts in other parts of recovery with
> > HandleStartupProcInterrupt(), which doesn't interact with latches, isn't the
> > actual bug that HandleStartupProcInterrupt() doesn't contain the same black
> > magic that CHECK_FOR_INTERRUPTS() contains on windows? Namely this stuff:
>
> Yeah, this seems like a more comprehensive fix. I've attached a patch that
> adds this Windows signaling stuff to the HandleXXXInterrupts() functions in
> the files you listed. Is this roughly what you had in mind? If so, I'll
> look around for anywhere else it is needed.

Yes, that's what I roughly was thinking of. Although seeing the diff, I think
it might be worth introducing a helper function that'd containing at least
pgwin32_dispatch_queued_signals() and ProcessProcSignalBarrier(). It's a bit
complicated by ProcessProcSignalBarrier() only being applicable to shared
memory connected processes - excluding e.g. pgarch.

Greetings,

Andres Freund