[CIFS] Reduce CIFS tcp congestion timeout (it was too long) and backoff

ever longer amounts (up to 15 seconds).  This improves performance
especially when using large wsize.

Signed-off-by: Steve French (sfrench@us.ibm.com)

1 files changed, 13 insertions, 3 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 1f97d39100ee..e3177a031edc 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -405,6 +405,16 @@ static struct quotactl_ops cifs_quotactl_ops = {
 };
 #endif
 
+static void cifs_umount_begin(struct super_block * sblock)
+{
+        cERROR(1,("kill all tasks now - umount begin not implemented yet"));
+
+/* BB FIXME - finish BB */
+
+        return;
+}
+        
+
 static int cifs_remount(struct super_block *sb, int *flags, char *data)
 {
         *flags |= MS_NODIRATIME;
@@ -422,7 +432,7 @@ struct super_operations cifs_super_ops = {
    unless later we add lazy close of inodes or unless the kernel forgets to call
    us with the same number of releases (closes) as opens */
         .show_options = cifs_show_options,
-/*    .umount_begin   = cifs_umount_begin, *//* consider adding in the future */
+/*      .umount_begin   = cifs_umount_begin, */ /* BB finish in the future */
         .remount_fs = cifs_remount,
 };
 
@@ -790,9 +800,7 @@ static int cifs_oplock_thread(void * dummyarg)
         do {
                 if(try_to_freeze()) 
                         continue;
-                set_current_state(TASK_INTERRUPTIBLE);
                 
-                schedule_timeout(1*HZ);  
                 spin_lock(&GlobalMid_Lock);
                 if(list_empty(&GlobalOplock_Q)) {
                         spin_unlock(&GlobalMid_Lock);
@@ -841,6 +849,8 @@ static int cifs_oplock_thread(void * dummyarg)
                                 }
                         } else
                                 spin_unlock(&GlobalMid_Lock);
+                        set_current_state(TASK_INTERRUPTIBLE);
+                        schedule_timeout(1);  /* yield in case q were corrupt */
                 }
         } while(!signal_pending(current));
         oplockThread = NULL;