Cache: proxy_cache_lock_age and friends.

Once this age is reached, the cache lock is discarded and another
request can acquire the lock.  Requests which failed to acquire
the lock are not allowed to cache the response.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/http/ngx_http_cache.h b/src/http/ngx_http_cache.h
index f89766d58..033882e53 100644
--- a/src/http/ngx_http_cache.h
+++ b/src/http/ngx_http_cache.h
@@ -57,6 +57,7 @@ typedef struct {
     time_t                           valid_sec;
     size_t                           body_start;
     off_t                            fs_size;
+    ngx_msec_t                       lock_time;
 } ngx_http_file_cache_node_t;
 
 
@@ -91,6 +92,8 @@ struct ngx_http_cache_s {
     ngx_http_file_cache_node_t      *node;
 
     ngx_msec_t                       lock_timeout;
+    ngx_msec_t                       lock_age;
+    ngx_msec_t                       lock_time;
     ngx_msec_t                       wait_time;
 
     ngx_event_t                      wait_event;