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| author | Fengguang Wu <fengguang.wu@intel.com> | 2012-05-06 13:21:42 +0800 |
|---|---|---|
| committer | Fengguang Wu <fengguang.wu@intel.com> | 2012-05-06 13:41:58 +0800 |
| commit | 68809c7108b9a75baf2a888b1c19ce1a4680f600 (patch) | |
| tree | 72dac532abb4f42d197023a0495952c387c835ce /mm/page-writeback.c | |
| parent | 4cd9069a0a0e5fb8b007425c937642682ac96c76 (diff) | |
| download | linux-3.10-68809c7108b9a75baf2a888b1c19ce1a4680f600.tar.gz linux-3.10-68809c7108b9a75baf2a888b1c19ce1a4680f600.tar.bz2 linux-3.10-68809c7108b9a75baf2a888b1c19ce1a4680f600.zip | |
writeback: initialize global_dirty_limit
This prevents global_dirty_limit from remaining 0 (the initial value)
for long time, since it's only updated in update_dirty_limit() when
above the dirty freerun area.
It will avoid unexpected consequences when some random code use it as a
convenient approximation of the global dirty threshold.
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 9dec97fee37..93d8d2f7108 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1568,6 +1568,7 @@ void writeback_set_ratelimit(void) unsigned long background_thresh; unsigned long dirty_thresh; global_dirty_limits(&background_thresh, &dirty_thresh); + global_dirty_limit = dirty_thresh; ratelimit_pages = dirty_thresh / (num_online_cpus() * 32); if (ratelimit_pages < 16) ratelimit_pages = 16; |