Re: [PATCH 12/12] vmscan: Do not writeback pages in direct reclaim

From: Rik van Riel
Date: Mon Jun 14 2010 - 17:56:48 EST

On 06/14/2010 07:17 AM, Mel Gorman wrote:

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4856a2a..574e816 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -372,6 +372,12 @@ int write_reclaim_page(struct page *page, struct address_space *mapping,

+/* kswapd and memcg can writeback as they are unlikely to overflow stack */
+static inline bool reclaim_can_writeback(struct scan_control *sc)
+ return current_is_kswapd() || sc->mem_cgroup != NULL;

I'm not entirely convinced on this bit, but am willing to
be convinced by the data.

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