The patch titled
writeback: fix increasement of nr_dirtied_pause
has been removed from the -mm tree. Its filename was
writeback-per-task-rate-limit-on-balance_dirty_pages-fix.patch
This patch was dropped because it was folded into writeback-per-task-rate-limit-on-balance_dirty_pages.patch
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: writeback: fix increasement of nr_dirtied_pause
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Date: Wed Nov 17 22:31:26 CST 2010
Fix a bug that
current->nr_dirtied_pause += current->nr_dirtied_pause >> 5;
does not effectively increase nr_dirtied_pause when it's <= 32.
Thus nr_dirtied_pause may never grow up..
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Chris Mason <chris.mason@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Li Shaohua <shaohua.li@xxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Richard Kennedy <richard@xxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Michael Rubin <mrubin@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page-writeback.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page-writeback.c~writeback-per-task-rate-limit-on-balance_dirty_pages-fix mm/page-writeback.c
--- a/mm/page-writeback.c~writeback-per-task-rate-limit-on-balance_dirty_pages-fix
+++ a/mm/page-writeback.c
@@ -580,7 +580,7 @@ pause:
if (pause == 0 && nr_dirty < background_thresh)
current->nr_dirtied_pause = ratelimit_pages(bdi);
else if (pause == 1)
- current->nr_dirtied_pause += current->nr_dirtied_pause >> 5;
+ current->nr_dirtied_pause += current->nr_dirtied_pause / 32 + 1;
else if (pause >= HZ/10)
/*
* when repeated, writing 1 page per 100ms on slow devices,
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
origin.patch
writeback-check-skipped-pages-on-wb_sync_all.patch
writeback-io-less-balance_dirty_pages.patch
writeback-consolidate-variable-names-in-balance_dirty_pages.patch
writeback-per-task-rate-limit-on-balance_dirty_pages.patch
writeback-prevent-duplicate-balance_dirty_pages_ratelimited-calls.patch
writeback-account-per-bdi-accumulated-written-pages.patch
writeback-bdi-write-bandwidth-estimation.patch
writeback-bdi-write-bandwidth-estimation-fix.patch
writeback-show-bdi-write-bandwidth-in-debugfs.patch
writeback-quit-throttling-when-bdi-dirty-pages-dropped-low.patch
writeback-reduce-per-bdi-dirty-threshold-ramp-up-time.patch
writeback-make-reasonable-gap-between-the-dirty-background-thresholds.patch
writeback-scale-down-max-throttle-bandwidth-on-concurrent-dirtiers.patch
writeback-add-trace-event-for-balance_dirty_pages.patch
writeback-make-nr_to_write-a-per-file-limit.patch
writeback-make-nr_to_write-a-per-file-limit-fix.patch
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