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low latency synchrounous lumpy reclaim

From:  KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To:  LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Andrew Morton <akpm@linux-foundation.org>, Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mel@csn.ul.ie>, Wu Fengguang <fengguang.wu@intel.com>, Minchan Kim <minchan.kim@gmail.com>, Rik van Riel <riel@redhat.com>
Subject:  [RFC][PATCH 0/7] low latency synchrounous lumpy reclaim
Date:  Thu, 5 Aug 2010 15:11:13 +0900 (JST)
Message-ID:  <20100805150624.31B7.A69D9226@jp.fujitsu.com>
Cc:  kosaki.motohiro@jp.fujitsu.com
Archive-link:  Article


If slow usb storage is connected and run plenty io operation, lumpy
reclaim often stall in shrink_inactive_list(). This patch series try 
to solve this issue.
At least, This works fine on my desktop and usb stick environment :-)

This patch is still RFC. comment, reviewing and testing are welcome!




Wu Fengguang (1):
  vmscan: raise the bar to PAGEOUT_IO_SYNC stalls

KOSAKI Motohiro (6):
  vmscan: synchronous lumpy reclaim don't call congestion_wait()
  vmscan: synchrounous lumpy reclaim use lock_page() instead trylock_page()
  vmscan: narrowing synchrounous lumply reclaim condition
  vmscan: kill dead code in shrink_inactive_list()
  vmscan: remove PF_SWAPWRITE from __zone_reclaim()
  vmscan: isolated_lru_pages() stop neighbor search if neighbor can't be isolated

 mm/vmscan.c |  211 ++++++++++++++++++++++++++++++++++++++--------------------
 1 files changed, 138 insertions(+), 73 deletions(-)



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