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-rw-r--r--fs/fs-writeback.c64
1 files changed, 16 insertions, 48 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ea8592b9069..1d1088f48bc 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -45,7 +45,6 @@ struct wb_writeback_args {
unsigned int for_kupdate:1;
unsigned int range_cyclic:1;
unsigned int for_background:1;
- unsigned int sb_pinned:1;
};
/*
@@ -193,8 +192,7 @@ static void bdi_wait_on_work_clear(struct bdi_work *work)
}
static void bdi_alloc_queue_work(struct backing_dev_info *bdi,
- struct wb_writeback_args *args,
- int wait)
+ struct wb_writeback_args *args)
{
struct bdi_work *work;
@@ -206,8 +204,6 @@ static void bdi_alloc_queue_work(struct backing_dev_info *bdi,
if (work) {
bdi_work_init(work, args);
bdi_queue_work(bdi, work);
- if (wait)
- bdi_wait_on_work_clear(work);
} else {
struct bdi_writeback *wb = &bdi->wb;
@@ -234,11 +230,6 @@ static void bdi_sync_writeback(struct backing_dev_info *bdi,
.sync_mode = WB_SYNC_ALL,
.nr_pages = LONG_MAX,
.range_cyclic = 0,
- /*
- * Setting sb_pinned is not necessary for WB_SYNC_ALL, but
- * lets make it explicitly clear.
- */
- .sb_pinned = 1,
};
struct bdi_work work;
@@ -254,23 +245,21 @@ static void bdi_sync_writeback(struct backing_dev_info *bdi,
* @bdi: the backing device to write from
* @sb: write inodes from this super_block
* @nr_pages: the number of pages to write
- * @sb_locked: caller already holds sb umount sem.
*
* Description:
* This does WB_SYNC_NONE opportunistic writeback. The IO is only
* started when this function returns, we make no guarentees on
- * completion. Caller specifies whether sb umount sem is held already or not.
+ * completion. Caller need not hold sb s_umount semaphore.
*
*/
void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
- long nr_pages, int sb_locked)
+ long nr_pages)
{
struct wb_writeback_args args = {
.sb = sb,
.sync_mode = WB_SYNC_NONE,
.nr_pages = nr_pages,
.range_cyclic = 1,
- .sb_pinned = sb_locked,
};
/*
@@ -282,7 +271,7 @@ void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
args.for_background = 1;
}
- bdi_alloc_queue_work(bdi, &args, sb_locked);
+ bdi_alloc_queue_work(bdi, &args);
}
/*
@@ -595,7 +584,7 @@ static enum sb_pin_state pin_sb_for_writeback(struct writeback_control *wbc,
/*
* Caller must already hold the ref for this
*/
- if (wbc->sync_mode == WB_SYNC_ALL || wbc->sb_pinned) {
+ if (wbc->sync_mode == WB_SYNC_ALL) {
WARN_ON(!rwsem_is_locked(&sb->s_umount));
return SB_NOT_PINNED;
}
@@ -769,7 +758,6 @@ static long wb_writeback(struct bdi_writeback *wb,
.for_kupdate = args->for_kupdate,
.for_background = args->for_background,
.range_cyclic = args->range_cyclic,
- .sb_pinned = args->sb_pinned,
};
unsigned long oldest_jif;
long wrote = 0;
@@ -912,7 +900,6 @@ long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
while ((work = get_next_work_item(bdi, wb)) != NULL) {
struct wb_writeback_args args = work->args;
- int post_clear;
/*
* Override sync mode, in case we must wait for completion
@@ -920,13 +907,11 @@ long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
if (force_wait)
work->args.sync_mode = args.sync_mode = WB_SYNC_ALL;
- post_clear = WB_SYNC_ALL || args.sb_pinned;
-
/*
* If this isn't a data integrity operation, just notify
* that we have seen this work and we are now starting it.
*/
- if (!post_clear)
+ if (args.sync_mode == WB_SYNC_NONE)
wb_clear_pending(wb, work);
wrote += wb_writeback(wb, &args);
@@ -935,7 +920,7 @@ long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
* This is a data integrity writeback, so only do the
* notification when we have completed the work.
*/
- if (post_clear)
+ if (args.sync_mode == WB_SYNC_ALL)
wb_clear_pending(wb, work);
}
@@ -1011,7 +996,7 @@ static void bdi_writeback_all(struct super_block *sb, long nr_pages)
if (!bdi_has_dirty_io(bdi))
continue;
- bdi_alloc_queue_work(bdi, &args, 0);
+ bdi_alloc_queue_work(bdi, &args);
}
rcu_read_unlock();
@@ -1220,18 +1205,6 @@ static void wait_sb_inodes(struct super_block *sb)
iput(old_inode);
}
-static void __writeback_inodes_sb(struct super_block *sb, int sb_locked)
-{
- unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY);
- unsigned long nr_unstable = global_page_state(NR_UNSTABLE_NFS);
- long nr_to_write;
-
- nr_to_write = nr_dirty + nr_unstable +
- (inodes_stat.nr_inodes - inodes_stat.nr_unused);
-
- bdi_start_writeback(sb->s_bdi, sb, nr_to_write, sb_locked);
-}
-
/**
* writeback_inodes_sb - writeback dirty inodes from given super_block
* @sb: the superblock
@@ -1243,21 +1216,16 @@ static void __writeback_inodes_sb(struct super_block *sb, int sb_locked)
*/
void writeback_inodes_sb(struct super_block *sb)
{
- __writeback_inodes_sb(sb, 0);
-}
-EXPORT_SYMBOL(writeback_inodes_sb);
+ unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY);
+ unsigned long nr_unstable = global_page_state(NR_UNSTABLE_NFS);
+ long nr_to_write;
-/**
- * writeback_inodes_sb_locked - writeback dirty inodes from given super_block
- * @sb: the superblock
- *
- * Like writeback_inodes_sb(), except the caller already holds the
- * sb umount sem.
- */
-void writeback_inodes_sb_locked(struct super_block *sb)
-{
- __writeback_inodes_sb(sb, 1);
+ nr_to_write = nr_dirty + nr_unstable +
+ (inodes_stat.nr_inodes - inodes_stat.nr_unused);
+
+ bdi_start_writeback(sb->s_bdi, sb, nr_to_write);
}
+EXPORT_SYMBOL(writeback_inodes_sb);
/**
* writeback_inodes_sb_if_idle - start writeback if none underway