[PATCH 5/5] lumpy: only check for valid pages when holes are present
From: Andy Whitcroft <hidden>
Date: 2007-02-27 19:36:30
Also in:
lkml
Subsystem:
memory management, memory management - mglru (multi-gen lru), memory management - reclaim, the rest · Maintainers:
Andrew Morton, Johannes Weiner, Linus Torvalds
We only need to check that each page is valid with pfn_valid when we are on an architecture which had holes within zones. Make this check conditional. Signed-off-by: Andy Whitcroft <redacted> ---
diff --git a/mm/vmscan.c b/mm/vmscan.c
index bef7e92..f249ad7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c@@ -725,9 +725,11 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, /* The target page is in the block, ignore it. */ if (unlikely(pfn == page_pfn)) continue; +#ifdef CONFIG_HOLES_IN_ZONE /* Avoid holes within the zone. */ if (unlikely(!pfn_valid(pfn))) break; +#endif cursor_page = pfn_to_page(pfn); /* Check that we have not crossed a zone boundary. */ --
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