diff options
Diffstat (limited to 'src/backend/access/transam/slru.c')
| -rw-r--r-- | src/backend/access/transam/slru.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c index ca69ee4d4f4..5d3fcd62c94 100644 --- a/src/backend/access/transam/slru.c +++ b/src/backend/access/transam/slru.c @@ -246,6 +246,7 @@ SimpleLruAutotuneBuffers(int divisor, int max) * buffer_tranche_id: tranche ID to use for the SLRU's per-buffer LWLocks. * bank_tranche_id: tranche ID to use for the bank LWLocks. * sync_handler: which set of functions to use to handle sync requests + * long_segment_names: use short or long segment names */ void SimpleLruInit(SlruCtl ctl, const char *name, int nslots, int nlsns, @@ -400,10 +401,10 @@ SimpleLruZeroPage(SlruCtl ctl, int64 pageno) /* * Assume this page is now the latest active page. * - * Note that because both this routine and SlruSelectLRUPage run with - * ControlLock held, it is not possible for this to be zeroing a page that - * SlruSelectLRUPage is going to evict simultaneously. Therefore, there's - * no memory barrier here. + * Note that because both this routine and SlruSelectLRUPage run with a + * SLRU bank lock held, it is not possible for this to be zeroing a page + * that SlruSelectLRUPage is going to evict simultaneously. Therefore, + * there's no memory barrier here. */ pg_atomic_write_u64(&shared->latest_page_number, pageno); @@ -437,7 +438,7 @@ SimpleLruZeroLSNs(SlruCtl ctl, int slotno) * This is a convenience wrapper for the common case of zeroing a page and * immediately flushing it to disk. * - * Control lock is acquired and released here. + * SLRU bank lock is acquired and released here. */ void SimpleLruZeroAndWritePage(SlruCtl ctl, int64 pageno) @@ -644,7 +645,7 @@ SimpleLruReadPage_ReadOnly(SlruCtl ctl, int64 pageno, TransactionId xid) shared->page_number[slotno] == pageno && shared->page_status[slotno] != SLRU_PAGE_READ_IN_PROGRESS) { - /* See comments for SlruRecentlyUsed macro */ + /* See comments for SlruRecentlyUsed() */ SlruRecentlyUsed(shared, slotno); /* update the stats counter of pages found in the SLRU */ |