No one is calling wb_writeback and write_cache_pages with
wbc.nonblocking=1 any more. And lumpy pageout will want to do
nonblocking writeback without the congestion wait.
CC: Chris Mason <[email protected]>
CC: Jens Axboe <[email protected]>
Signed-off-by: Wu Fengguang <[email protected]>
---
mm/page-writeback.c | 12 ------------
1 file changed, 12 deletions(-)
--- linux.orig/mm/page-writeback.c 2009-11-27 16:35:00.000000000 +0800
+++ linux/mm/page-writeback.c 2009-11-27 18:55:00.000000000 +0800
@@ -821,7 +821,6 @@ int write_cache_pages(struct address_spa
struct writeback_control *wbc, writepage_t writepage,
void *data)
{
- struct backing_dev_info *bdi = mapping->backing_dev_info;
int ret = 0;
int done = 0;
struct pagevec pvec;
@@ -834,11 +833,6 @@ int write_cache_pages(struct address_spa
int range_whole = 0;
long nr_to_write = wbc->nr_to_write;
- if (wbc->nonblocking && bdi_write_congested(bdi)) {
- wbc->encountered_congestion = 1;
- return 0;
- }
-
pagevec_init(&pvec, 0);
if (wbc->range_cyclic) {
writeback_index = mapping->writeback_index; /* prev offset */
@@ -957,12 +951,6 @@ continue_unlock:
break;
}
}
-
- if (wbc->nonblocking && bdi_write_congested(bdi)) {
- wbc->encountered_congestion = 1;
- done = 1;
- break;
- }
}
pagevec_release(&pvec);
cond_resched();