diff options
Diffstat (limited to 'nscd')
| -rw-r--r-- | nscd/cache.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/nscd/cache.c b/nscd/cache.c index 56198f6..e5a8499 100644 --- a/nscd/cache.c +++ b/nscd/cache.c @@ -229,22 +229,9 @@ prune_cache (struct database_dyn *table, time_t now, int fd) return; } - /* This function can be called from the cleanup thread but also in - response to an invalidate command. Make sure only one thread is - running. When not serving INVALIDATE request, no need for the - second to wait around. */ - if (fd == -1) - { - if (pthread_mutex_trylock (&table->prunelock) != 0) - /* The work is already being done. */ - return; - } - else - pthread_mutex_lock (&table->prunelock); - /* If we check for the modification of the underlying file we invalidate the entries also in this case. */ - if (table->check_file) + if (table->check_file && now != LONG_MAX) { struct stat64 st; @@ -269,6 +256,21 @@ prune_cache (struct database_dyn *table, time_t now, int fd) } } + /* This function can be called from the cleanup thread but also in + response to an invalidate command. Make sure only one thread is + running. When not serving INVALIDATE request, no need for the + second thread to wait around. */ + if (__builtin_expect (pthread_mutex_trylock (&table->prunelock) != 0, 0)) + { + /* The work is already being done. */ + if (fd == -1) + return; + + /* We have to wait until the thread is done and then run again + so that the large NOW value invalidates all entries. */ + pthread_mutex_lock (&table->prunelock); + } + /* We run through the table and find values which are not valid anymore. Note that for the initial step, finding the entries to be removed, @@ -285,6 +287,7 @@ prune_cache (struct database_dyn *table, time_t now, int fd) dbg_log (_("pruning %s cache; time %ld"), dbnames[table - dbs], (long int) now); + time_t next_timeout = LONG_MAX; do { ref_t run = table->head->array[--cnt]; @@ -363,14 +366,17 @@ prune_cache (struct database_dyn *table, time_t now, int fd) } } else - assert (dh->usable); + { + assert (dh->usable); + next_timeout = MIN (next_timeout, dh->timeout); + } run = runp->next; } } while (cnt > 0); - if (fd != -1) + if (__builtin_expect (fd != -1, 0)) { /* Reply to the INVALIDATE initiator that the cache has been invalidated. */ |