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Migrate PGPROC's backendLock into PGPROC itself, using a new tranche.

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Previously, each PGPROC's backendLock was part of the main tranche,
and the PGPROC just contained a pointer.  Now, the actual LWLock is
part of the PGPROC.

As with previous, similar patches, this makes it significantly easier
to identify these lwlocks in LWLOCK_STATS or Trace_lwlocks output
and improves modularity.

Author: Ildus Kurbangaliev
Reviewed-by: Amit Kapila, Robert Haas
This commit is contained in:
Robert Haas
2016-01-29 08:10:47 -05:00
parent b603766496
commit b319356f0e
6 changed files with 42 additions and 34 deletions
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2
src/backend/storage/lmgr/proc.c
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@@ -226,7 +226,7 @@ InitProcGlobal(void)
{
PGSemaphoreCreate(&(procs[i].sem));
InitSharedLatch(&(procs[i].procLatch));
procs[i].backendLock = LWLockAssign();
LWLockInitialize(&(procs[i].backendLock), LWTRANCHE_PROC);
}
procs[i].pgprocno = i;