Btrfs: always pin metadata in discard mode

[safe/jmp/linux-2.6] / fs / ubifs / io.c

diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index 2ef689a..762a7d6 100644 (file)
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -312,11 +312,12 @@ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
 {
        ubifs_assert(!hrtimer_active(&wbuf->timer));
 
-       if (!ktime_to_ns(wbuf->softlimit))
+       if (wbuf->no_timer)
                return;
        dbg_io("set timer for jhead %d, %llu-%llu millisecs", wbuf->jhead,
-              ktime_to_ns(wbuf->softlimit)/USEC_PER_SEC,
-              (ktime_to_ns(wbuf->softlimit) + wbuf->delta)/USEC_PER_SEC);
+              div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC),
+              div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta,
+                      USEC_PER_SEC));
        hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta,
                               HRTIMER_MODE_REL);
 }
@@ -327,11 +328,8 @@ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
  */
 static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
 {
-       /*
-        * If the syncer is waiting for the lock (from the background thread's
-        * context) and another task is changing write-buffer then the syncing
-        * should be canceled.
-        */
+       if (wbuf->no_timer)
+               return;
        wbuf->need_sync = 0;
        hrtimer_cancel(&wbuf->timer);
 }
@@ -394,7 +392,7 @@ int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf)
  * @offs: logical eraseblock offset to seek to
  * @dtype: data type
  *
- * This function targets the write buffer to logical eraseblock @lnum:@offs.
+ * This function targets the write-buffer to logical eraseblock @lnum:@offs.
  * The write-buffer is synchronized if it is not empty. Returns zero in case of
  * success and a negative error code in case of failure.
  */
@@ -825,13 +823,12 @@ out:
  * @c: UBIFS file-system description object
  * @wbuf: write-buffer to initialize
  *
- * This function initializes write buffer. Returns zero in case of success
+ * This function initializes write-buffer. Returns zero in case of success
  * %-ENOMEM in case of failure.
  */
 int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
 {
        size_t size;
-       ktime_t hardlimit;
 
        wbuf->buf = kmalloc(c->min_io_size, GFP_KERNEL);
        if (!wbuf->buf)
@@ -857,24 +854,16 @@ int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
 
        hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
        wbuf->timer.function = wbuf_timer_callback_nolock;
-       /*
-        * Make write-buffer soft limit to be 20% of the hard limit. The
-        * write-buffer timer is allowed to expire any time between the soft
-        * and hard limits.
-        */
-       hardlimit = ktime_set(DEFAULT_WBUF_TIMEOUT_SECS, 0);
-       wbuf->delta = DEFAULT_WBUF_TIMEOUT_SECS * 1000000000ULL * 2 / 10;
-       if (wbuf->delta > ULONG_MAX)
-               wbuf->delta = ULONG_MAX;
-       wbuf->softlimit = ktime_sub_ns(hardlimit, wbuf->delta);
-       hrtimer_set_expires_range_ns(&wbuf->timer,  wbuf->softlimit,
-                                    wbuf->delta);
+       wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0);
+       wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT;
+       wbuf->delta *= 1000000000ULL;
+       ubifs_assert(wbuf->delta <= ULONG_MAX);
        return 0;
 }
 
 /**
  * ubifs_wbuf_add_ino_nolock - add an inode number into the wbuf inode array.
- * @wbuf: the write-buffer whereto add
+ * @wbuf: the write-buffer where to add
  * @inum: the inode number
  *
  * This function adds an inode number to the inode array of the write-buffer.