diff options
| author | Tom Lane | 2007-06-01 23:43:28 +0000 |
|---|---|---|
| committer | Tom Lane | 2007-06-01 23:43:28 +0000 |
| commit | bc7ccdfe461e9472f736a2809342135eea661692 (patch) | |
| tree | 84503db0327b923aaeae2bc065c213c032e1049e | |
| parent | 962cd2344e256ab783584c961a6a67de0c98015b (diff) | |
Fix aboriginal bug in BufFileDumpBuffer that would cause it to write the
wrong data when dumping a bufferload that crosses a component-file boundary.
This probably has not been seen in the wild because (a) component files are
normally 1GB apiece and (b) non-block-aligned buffer usage is relatively
rare. But it's fairly easy to reproduce a problem if one reduces RELSEG_SIZE
in a test build. Kudos to Kurt Harriman for spotting the bug.
| -rw-r--r-- | src/backend/storage/file/buffile.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/storage/file/buffile.c b/src/backend/storage/file/buffile.c index 29a01f02c92..85f597675c7 100644 --- a/src/backend/storage/file/buffile.c +++ b/src/backend/storage/file/buffile.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.21 2004/12/31 22:00:51 pgsql Exp $ + * $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.21.4.1 2007/06/01 23:43:28 tgl Exp $ * * NOTES: * @@ -292,7 +292,7 @@ BufFileDumpBuffer(BufFile *file) return; /* seek failed, give up */ file->offsets[file->curFile] = file->curOffset; } - bytestowrite = FileWrite(thisfile, file->buffer, bytestowrite); + bytestowrite = FileWrite(thisfile, file->buffer + wpos, bytestowrite); if (bytestowrite <= 0) return; /* failed to write */ file->offsets[file->curFile] += bytestowrite; |