48 lines
1.7 KiB
Diff
48 lines
1.7 KiB
Diff
|
From linux-fsdevel-owner@vger.kernel.org Fri May 13 10:03:52 2011
|
||
|
|
From: Mel Gorman <mgorman@suse.de>
|
||
|
|
To: Andrew Morton <akpm@linux-foundation.org>
|
||
|
|
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
|
||
|
|
Colin King <colin.king@canonical.com>,
|
||
|
|
Raghavendra D Prabhu <raghu.prabhu13@gmail.com>,
|
||
|
|
Jan Kara <jack@suse.cz>, Chris Mason <chris.mason@oracle.com>,
|
||
|
|
Christoph Lameter <cl@linux.com>,
|
||
|
|
Pekka Enberg <penberg@kernel.org>,
|
||
|
|
Rik van Riel <riel@redhat.com>,
|
||
|
|
Johannes Weiner <hannes@cmpxchg.org>,
|
||
|
|
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
|
||
|
|
linux-mm <linux-mm@kvack.org>,
|
||
|
|
linux-kernel <linux-kernel@vger.kernel.org>,
|
||
|
|
linux-ext4 <linux-ext4@vger.kernel.org>,
|
||
|
|
Mel Gorman <mgorman@suse.de>
|
||
|
|
Subject: [PATCH 4/4] mm: vmscan: If kswapd has been running too long, allow it to sleep
|
||
|
|
Date: Fri, 13 May 2011 15:03:24 +0100
|
||
|
|
Message-Id: <1305295404-12129-5-git-send-email-mgorman@suse.de>
|
||
|
|
X-Mailing-List: linux-fsdevel@vger.kernel.org
|
||
|
|
|
||
|
|
Under constant allocation pressure, kswapd can be in the situation where
|
||
|
|
sleeping_prematurely() will always return true even if kswapd has been
|
||
|
|
running a long time. Check if kswapd needs to be scheduled.
|
||
|
|
|
||
|
|
Signed-off-by: Mel Gorman <mgorman@suse.de>
|
||
|
|
---
|
||
|
|
mm/vmscan.c | 4 ++++
|
||
|
|
1 files changed, 4 insertions(+), 0 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/mm/vmscan.c b/mm/vmscan.c
|
||
|
|
index af24d1e..4d24828 100644
|
||
|
|
--- a/mm/vmscan.c
|
||
|
|
+++ b/mm/vmscan.c
|
||
|
|
@@ -2251,6 +2251,10 @@ static bool sleeping_prematurely(pg_data_t *pgdat, int order, long remaining,
|
||
|
|
unsigned long balanced = 0;
|
||
|
|
bool all_zones_ok = true;
|
||
|
|
|
||
|
|
+ /* If kswapd has been running too long, just sleep */
|
||
|
|
+ if (need_resched())
|
||
|
|
+ return false;
|
||
|
|
+
|
||
|
|
/* If a direct reclaimer woke kswapd within HZ/10, it's premature */
|
||
|
|
if (remaining)
|
||
|
|
return true;
|
||
|
|
--
|
||
|
|
1.7.3.4
|