pgsql: Fix double shared memory allocation.

From: Teodor Sigaev <teodor(at)sigaev(dot)ru>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix double shared memory allocation.
Date: 2017-07-21 10:31:32
Message-ID: E1dYVDY-0005Xj-Gl@gemulon.postgresql.org
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Fix double shared memory allocation.

SLRU buffer lwlocks are allocated twice by oversight in commit
fe702a7b3f9f2bc5bf6d173166d7d55226af82c8 where that locks were moved to
separate tranche. The bug doesn't have user-visible effects except small
overspending of shared memory.

Backpatch to 9.6 where it was introduced.

Alexander Korotkov with small editorization by me.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/7e1fb4c59e4ac86de2640d0f3453fde270ec1ff8

Modified Files
--------------
src/backend/access/transam/slru.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

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