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Move MAX_BACKENDS to procnumber.h

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MAX_BACKENDS influences many things besides postmaster. I e.g. noticed that we
don't have static assertions ensuring BUF_REFCOUNT_MASK is big enough for
MAX_BACKENDS, adding them would require including postmaster.h in
buf_internals.h which doesn't seem right.

While at that, add MAX_BACKENDS_BITS, as that's useful in various places for
static assertions (to be added in subsequent commits).

Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/wptizm4qt6yikgm2pt52xzyv6ycmqiutloyvypvmagn7xvqkce@d4xuv3mylpg4
This commit is contained in:
Andres Freund
2025-02-24 05:39:17 -05:00
parent 0600d276d4
commit 6394a3a61c
6 changed files with 17 additions and 14 deletions
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2
src/backend/storage/lmgr/lwlock.c
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@@ -80,9 +80,9 @@
#include "pg_trace.h"
#include "pgstat.h"
#include "port/pg_bitutils.h"
#include "postmaster/postmaster.h"
#include "storage/proc.h"
#include "storage/proclist.h"
#include "storage/procnumber.h"
#include "storage/spin.h"
#include "utils/memutils.h"