[Devel] [PATCH rh7] Revert diff-writeback-throttle-writer-when-local-BDI-threshold-is-hit bits

[Vladimir Davydov]

This was brought by the initial commit 2a8b5de95918, but it is
incomplete - the following hunk patching balance_dirty_pages was lost:

> diff --git a/mm/page-writeback.c b/mm/page-writeback.c
> index 003b68e..a58795c 100644
> --- a/mm/page-writeback.c
> +++ b/mm/page-writeback.c
> @@ -546,7 +546,8 @@ static void balance_dirty_pages(struct address_space *mapping,
>                * catch-up. This avoids (excessively) small writeouts
>                * when the bdi limits are ramping up.
>                */
> -             if (nr_reclaimable + nr_writeback <
> +             if (bdi_cap_account_writeback(bdi) &&
> +                 nr_reclaimable + nr_writeback <
>                               (background_thresh + dirty_thresh) / 2 &&
>                   ub_dirty + ub_writeback <
>                               (ub_background_thresh + ub_thresh) / 2)

I've filed a separate issue for porting it:

https://jira.sw.ru/browse/PSBM-39167

Signed-off-by: Vladimir Davydov <vdavydov at parallels.com>
---
 fs/fs-writeback.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 9cdcc28b2ee5..66586a4f32de 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -843,9 +843,6 @@ static bool over_bground_thresh(struct backing_dev_info *bdi)
 {
 	unsigned long background_thresh, dirty_thresh;
 
-	if (!bdi_cap_account_writeback(bdi) && bdi->dirty_exceeded)
-		return true;
-
 	global_dirty_limits(&background_thresh, &dirty_thresh);
 
 	if (global_page_state(NR_FILE_DIRTY) +
-- 
2.1.4