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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2009-09-21 05:09:22 -0400
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2009-09-21 05:09:22 -0400
commit7cce2f4cb7f5f641f78c8e3eea4e7b1b96cb71c0 (patch)
treeb064d077928cf224660ab1e1841cdab2c9fd8b08 /fs/ubifs/budget.c
parente055f7e873d900925c222cf2d1ec955af4a9ca90 (diff)
parentebc79c4f8da0f92efa968e0328f32334a2ce80cf (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into linux-next
Conflicts: fs/ubifs/super.c Merge the upstream tree in order to resolve a conflict with the per-bdi writeback changes from the linux-2.6-block tree.
Diffstat (limited to 'fs/ubifs/budget.c')
-rw-r--r--fs/ubifs/budget.c32
1 files changed, 3 insertions, 29 deletions
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c
index c1f3f99b2939..076ca50e9933 100644
--- a/fs/ubifs/budget.c
+++ b/fs/ubifs/budget.c
@@ -54,41 +54,15 @@
54 * @nr_to_write: how many dirty pages to write-back 54 * @nr_to_write: how many dirty pages to write-back
55 * 55 *
56 * This function shrinks UBIFS liability by means of writing back some amount 56 * This function shrinks UBIFS liability by means of writing back some amount
57 * of dirty inodes and their pages. Returns the amount of pages which were 57 * of dirty inodes and their pages.
58 * written back. The returned value does not include dirty inodes which were
59 * synchronized.
60 * 58 *
61 * Note, this function synchronizes even VFS inodes which are locked 59 * Note, this function synchronizes even VFS inodes which are locked
62 * (@i_mutex) by the caller of the budgeting function, because write-back does 60 * (@i_mutex) by the caller of the budgeting function, because write-back does
63 * not touch @i_mutex. 61 * not touch @i_mutex.
64 */ 62 */
65static int shrink_liability(struct ubifs_info *c, int nr_to_write) 63static void shrink_liability(struct ubifs_info *c, int nr_to_write)
66{ 64{
67 int nr_written; 65 writeback_inodes_sb(c->vfs_sb);
68 struct writeback_control wbc = {
69 .sync_mode = WB_SYNC_NONE,
70 .range_end = LLONG_MAX,
71 .nr_to_write = nr_to_write,
72 };
73
74 generic_sync_sb_inodes(c->vfs_sb, &wbc);
75 nr_written = nr_to_write - wbc.nr_to_write;
76
77 if (!nr_written) {
78 /*
79 * Re-try again but wait on pages/inodes which are being
80 * written-back concurrently (e.g., by pdflush).
81 */
82 memset(&wbc, 0, sizeof(struct writeback_control));
83 wbc.sync_mode = WB_SYNC_ALL;
84 wbc.range_end = LLONG_MAX;
85 wbc.nr_to_write = nr_to_write;
86 generic_sync_sb_inodes(c->vfs_sb, &wbc);
87 nr_written = nr_to_write - wbc.nr_to_write;
88 }
89
90 dbg_budg("%d pages were written back", nr_written);
91 return nr_written;
92} 66}
93 67
94/** 68/**