Use correctly-sized buffer when zero-filling a WAL file.

I mixed up BLCKSZ and XLOG_BLCKSZ when I changed the way the buffer is
allocated a couple of weeks ago. With the default settings, they are both
8k, but they can be changed at compile-time.

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 2f715903245153198387ceee16cbacebe3c6ad64..77d599bf224039ecc9ef15ab99fc536845532aa3 100644 (file)
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -2449,7 +2449,7 @@ XLogFileInit(uint32 log, uint32 seg,
 {
        char            path[MAXPGPATH];
        char            tmppath[MAXPGPATH];
-       char            zbuffer_raw[BLCKSZ + MAXIMUM_ALIGNOF];
+       char            zbuffer_raw[XLOG_BLCKSZ + MAXIMUM_ALIGNOF];
        char       *zbuffer;
        uint32          installed_log;
        uint32          installed_seg;
@@ -2511,7 +2511,7 @@ XLogFileInit(uint32 log, uint32 seg,
         * cycles transferring data to the kernel.
         */
        zbuffer = (char *) MAXALIGN(zbuffer_raw);
-       memset(zbuffer, 0, BLCKSZ);
+       memset(zbuffer, 0, XLOG_BLCKSZ);
        for (nbytes = 0; nbytes < XLogSegSize; nbytes += XLOG_BLCKSZ)
        {
                errno = 0;