Horton

Re: make MaxBackends available in _PG_init

Nathan Bossart <nathandbossart@gmail.com>

View thread View on postgr.es
From: Nathan Bossart <nathandbossart@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>, "Bossart, Nathan" <bossartn@amazon.com>, Fujii Masao <masao.fujii@oss.nttdata.com>, "wangsh.fnst@fujitsu.com" <wangsh.fnst@fujitsu.com>, Andres Freund <andres@anarazel.de>, Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, Greg Sabino Mullane <htamfids@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>
Date: 2022-02-04T20:13:49Z
Lists: pgsql-hackers

Attachments

On Fri, Feb 04, 2022 at 08:46:39AM -0500, Robert Haas wrote:
> For multixact.c, I think you should invent GetMaxOldestSlot() to avoid
> confusion. Maybe it could be a static inline rather than a macro.
> 
> Likewise, I think PROCARRAY_MAXPROCS, NumProcSignalSlots, and
> NumBackendStatSlots should be replaced with things that look more like
> function calls.

Sorry, I did notice that it looked odd, and I should've done this in v8 and
saved a round trip.  Here's a new revision with those macros converted to
inline functions.  I've also dialed things back a little in some places
where a new variable felt excessive.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

Commits

  1. Add a new shmem_request_hook hook.

  2. Remove non-functional code for unloading loadable modules.

  3. Fix misleading comments about background worker registration.

  4. Revert the addition of GetMaxBackends() and related stuff.

  5. Fix typo in multixact.c

  6. Reduce more the number of calls to GetMaxBackends()

  7. Remove MaxBackends variable in favor of GetMaxBackends() function.

  8. Fix comments about bgworker registration before MaxBackends initialization

  9. Fix bogus assertion in BootstrapModeMain().

  10. Make sure MaxBackends is always set