diff options
| author | Andres Freund <andres@anarazel.de> | 2025-10-08 14:34:30 -0400 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2025-10-08 14:34:30 -0400 |
| commit | 2a2e1b470b9b4e9c7d76bc227db02a2efbb57473 (patch) | |
| tree | be39d78176ab1a52aa283d96dacdf6f61652a71c /src/backend/storage/buffer/bufmgr.c | |
| parent | 3c2b97b29ee33d5619779fd10e06eee07d4700da (diff) | |
bufmgr: Fix signedness of mask variable in BufferSync()
BM_PERMANENT is defined as 1U<<31, which is a negative number when interpreted
as a signed integer. Unfortunately the mask variable in BufferSync() was
signed. This has been wrong for a long time, but failed to fail, due to
integer conversion rules.
However, in an upcoming patch the width of the state variable will be
increased, with the wrong signedness leading to never flushing permanent
buffers - luckily caught in a test.
It seems better to fix this separately, instead of doing so as part of a
large, otherwise mechanical, patch.
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Discussion: https://postgr.es/m/fvfmkr5kk4nyex56ejgxj3uzi63isfxovp2biecb4bspbjrze7@az2pljabhnff
Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index fd462a25beb..8ee7d3b441b 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -3321,7 +3321,7 @@ BufferSync(int flags) Oid last_tsid; binaryheap *ts_heap; int i; - int mask = BM_DIRTY; + uint32 mask = BM_DIRTY; WritebackContext wb_context; /* |