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Make sure ControlFile logId/logSeg don't go backwards (barely possible given a

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slow backend, if we update unconditionally as the code did before).
This commit is contained in:
Tom Lane 2001-03-18 00:30:27 +00:00
parent 4bcb80a3e3
commit ae293d33cf
1 changed files with 4 additions and 3 deletions
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7
src/backend/access/transam/xlog.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.60 2001/03/17 20:54:13 tgl Exp $ * $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.61 2001/03/18 00:30:27 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -1003,8 +1003,9 @@ XLogWrite(XLogwrtRqst WriteRqst)
/* update pg_control, unless someone else already did */ /* update pg_control, unless someone else already did */
SpinAcquire(ControlFileLockId); SpinAcquire(ControlFileLockId);
if (ControlFile->logId != openLogId || if (ControlFile->logId < openLogId ||
ControlFile->logSeg != openLogSeg + 1) (ControlFile->logId == openLogId &&
ControlFile->logSeg < openLogSeg + 1))
{ {
ControlFile->logId = openLogId; ControlFile->logId = openLogId;
ControlFile->logSeg = openLogSeg + 1; ControlFile->logSeg = openLogSeg + 1;