Re: Improve logging when using Huge Pages

On Tue, Jun 20, 2023 at 06:44:20PM -0500, Justin Pryzby wrote:
> On Tue, Jun 13, 2023 at 02:50:30PM +0900, Michael Paquier wrote:
>> On Mon, Jun 12, 2023 at 02:37:15PM -0700, Nathan Bossart wrote:
>> > Fair enough.  I know I've been waffling in the GUC versus function
>> > discussion, but FWIW v7 of the patch looks reasonable to me.
>> 
>> +       Assert(strcmp("unknown", GetConfigOption("huge_pages_status", false, false)) != 0);
>> 
>> Not sure that there is anything to gain with this assertion in
>> CreateSharedMemoryAndSemaphores(), because this is pretty much what
>> check_GUC_init() looks after?
> 
> It seems like you misread the assertion, so I added a comment about it.
> Indeed, the assertion addresses the other question you asked later.
> 
> That's what I already commented about, and the reason I found it
> compelling not to use a boolean.

Apologies for the late reply here.

At the end, I am on board with the addition of this assertion and its
position after PGSharedMemoryCreate().

I would also move the SetConfigOption() for the WIN32 path after ew
have passed all the checks.  There are a few FATALs that can be
triggered so it would be a waste to call it if we are going to fail
the shmem creation in this path.

I could not resist adding two checks in the TAP tests to make sure
that we don't report unknown.  Perhaps that's not necessary, but that
would provide coverage in a more broader way, and these are cheap.

I have run one indentation, while on it.

Note to self: check that manually on Windows.
--
Michael