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Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull writeback fix from Jens Axboe:
 "Just a single fix for domain aware writeback, fixing a regression that
  can cause balance_dirty_pages() to keep looping while not getting any
  work done"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: Fix performance regression in wb_over_bg_thresh()
4.6.x
Linus Torvalds 2016-05-06 13:08:35 -07:00
parent 3f86ba5d0c 74d3694433
commit 0783783104
1 changed files with 4 additions and 2 deletions
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6
mm/page-writeback.c
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@ -1910,7 +1910,8 @@ bool wb_over_bg_thresh(struct bdi_writeback *wb)
if (gdtc->dirty > gdtc->bg_thresh)
return true;
if (wb_stat(wb, WB_RECLAIMABLE) > __wb_calc_thresh(gdtc))
if (wb_stat(wb, WB_RECLAIMABLE) >
wb_calc_thresh(gdtc->wb, gdtc->bg_thresh))
return true;
if (mdtc) {
@ -1924,7 +1925,8 @@ bool wb_over_bg_thresh(struct bdi_writeback *wb)
if (mdtc->dirty > mdtc->bg_thresh)
return true;
if (wb_stat(wb, WB_RECLAIMABLE) > __wb_calc_thresh(mdtc))
if (wb_stat(wb, WB_RECLAIMABLE) >
wb_calc_thresh(mdtc->wb, mdtc->bg_thresh))
return true;
}