diff options
Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index c6bae12e56d..91f0c7eb36e 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -207,7 +207,8 @@ ReadBuffer(Relation reln, BlockNumber blockNum) * Assume when this function is called, that reln has been opened already. * * In RBM_NORMAL mode, the page is read from disk, and the page header is - * validated. An error is thrown if the page header is not valid. + * validated. An error is thrown if the page header is not valid. (But + * note that an all-zero page is considered "valid"; see PageIsVerified().) * * RBM_ZERO_ON_ERROR is like the normal mode, but if the page header is not * valid, the page is zeroed instead of throwing an error. This is intended @@ -221,6 +222,8 @@ ReadBuffer(Relation reln, BlockNumber blockNum) * current physical EOF; that is likely to cause problems in md.c when * the page is modified and written out. P_NEW is OK, though. * + * RBM_NORMAL_NO_LOG mode is treated the same as RBM_NORMAL here. + * * If strategy is not NULL, a nondefault buffer access strategy is used. * See buffer/README for details. */ |