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Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index 1c77daa611a..56e4d6fb022 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -1933,6 +1933,14 @@ AdvanceXLInsertBuffer(XLogRecPtr upto, TimeLineID tli, bool opportunistic) NewPage = (XLogPageHeader) (XLogCtl->pages + nextidx * (Size) XLOG_BLCKSZ); /* + * Mark the xlblock with InvalidXLogRecPtr and issue a write barrier + * before initializing. Otherwise, the old page may be partially + * zeroed but look valid. + */ + pg_atomic_write_u64(&XLogCtl->xlblocks[nextidx], InvalidXLogRecPtr); + pg_write_barrier(); + + /* * Be sure to re-zero the buffer so that bytes beyond what we've * written will look like zeroes and not valid XLOG records... */ |