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-rw-r--r--mm/page-writeback.c35
1 files changed, 20 insertions, 15 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b493db7..74dc57c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -209,7 +209,7 @@ int dirty_bytes_handler(struct ctl_table *table, int write,
struct file *filp, void __user *buffer, size_t *lenp,
loff_t *ppos)
{
- int old_bytes = vm_dirty_bytes;
+ unsigned long old_bytes = vm_dirty_bytes;
int ret;
ret = proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos);
@@ -240,7 +240,7 @@ void bdi_writeout_inc(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL_GPL(bdi_writeout_inc);
-static inline void task_dirty_inc(struct task_struct *tsk)
+void task_dirty_inc(struct task_struct *tsk)
{
prop_inc_single(&vm_dirties, &tsk->dirties);
}
@@ -1051,13 +1051,25 @@ continue_unlock:
}
}
- if (wbc->sync_mode == WB_SYNC_NONE) {
- wbc->nr_to_write--;
- if (wbc->nr_to_write <= 0) {
+ if (nr_to_write > 0) {
+ nr_to_write--;
+ if (nr_to_write == 0 &&
+ wbc->sync_mode == WB_SYNC_NONE) {
+ /*
+ * We stop writing back only if we are
+ * not doing integrity sync. In case of
+ * integrity sync we have to keep going
+ * because someone may be concurrently
+ * dirtying pages, and we might have
+ * synced a lot of newly appeared dirty
+ * pages, but have not synced all of the
+ * old dirty pages.
+ */
done = 1;
break;
}
}
+
if (wbc->nonblocking && bdi_write_congested(bdi)) {
wbc->encountered_congestion = 1;
done = 1;
@@ -1067,7 +1079,7 @@ continue_unlock:
pagevec_release(&pvec);
cond_resched();
}
- if (!cycled) {
+ if (!cycled && !done) {
/*
* range_cyclic:
* We hit the last page and there is more work to be done: wrap
@@ -1218,6 +1230,7 @@ int __set_page_dirty_nobuffers(struct page *page)
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_bdi_stat(mapping->backing_dev_info,
BDI_RECLAIMABLE);
+ task_dirty_inc(current);
task_io_account_write(PAGE_CACHE_SIZE);
}
radix_tree_tag_set(&mapping->page_tree,
@@ -1250,7 +1263,7 @@ EXPORT_SYMBOL(redirty_page_for_writepage);
* If the mapping doesn't provide a set_page_dirty a_op, then
* just fall through and assume that it wants buffer_heads.
*/
-static int __set_page_dirty(struct page *page)
+int set_page_dirty(struct page *page)
{
struct address_space *mapping = page_mapping(page);
@@ -1268,14 +1281,6 @@ static int __set_page_dirty(struct page *page)
}
return 0;
}
-
-int set_page_dirty(struct page *page)
-{
- int ret = __set_page_dirty(page);
- if (ret)
- task_dirty_inc(current);
- return ret;
-}
EXPORT_SYMBOL(set_page_dirty);
/*
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