lkml.org 
[lkml]   [2006]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 3/5] linear reclaim pull out unfreeable page return
linear reclaim pull out unfreeable page return

Both lru reclaim and linear reclaim need to return unused pages.
Pull out unfreeable page return code for later use by linear reclaim.

Added in: V1

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
---
diff --git a/mm/vmscan.c b/mm/vmscan.c
index afa7c03..4a72976 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -632,6 +632,32 @@ static unsigned long isolate_lru_pages(u
}

/*
+ * Put back any unfreeable pages, returning them to the appropriate
+ * lru list.
+ */
+static void return_unfreeable_pages(struct list_head *page_list,
+ struct zone *zone, struct pagevec *pvec)
+{
+ struct page *page;
+
+ while (!list_empty(page_list)) {
+ page = lru_to_page(page_list);
+ VM_BUG_ON(PageLRU(page));
+ SetPageLRU(page);
+ list_del(&page->lru);
+ if (PageActive(page))
+ add_page_to_active_list(zone, page);
+ else
+ add_page_to_inactive_list(zone, page);
+ if (!pagevec_add(pvec, page)) {
+ spin_unlock_irq(&zone->lru_lock);
+ __pagevec_release(pvec);
+ spin_lock_irq(&zone->lru_lock);
+ }
+ }
+}
+
+/*
* shrink_inactive_list() is a helper for shrink_zone(). It returns the number
* of reclaimed pages
*/
@@ -648,7 +674,6 @@ static unsigned long shrink_inactive_lis
lru_add_drain();
spin_lock_irq(&zone->lru_lock);
do {
- struct page *page;
unsigned long nr_taken;
unsigned long nr_scan;
unsigned long nr_freed;
@@ -676,24 +701,8 @@ static unsigned long shrink_inactive_lis
goto done;

spin_lock(&zone->lru_lock);
- /*
- * Put back any unfreeable pages.
- */
- while (!list_empty(&page_list)) {
- page = lru_to_page(&page_list);
- VM_BUG_ON(PageLRU(page));
- SetPageLRU(page);
- list_del(&page->lru);
- if (PageActive(page))
- add_page_to_active_list(zone, page);
- else
- add_page_to_inactive_list(zone, page);
- if (!pagevec_add(&pvec, page)) {
- spin_unlock_irq(&zone->lru_lock);
- __pagevec_release(&pvec);
- spin_lock_irq(&zone->lru_lock);
- }
- }
+
+ return_unfreeable_pages(&page_list, zone, &pvec);
} while (nr_scanned < max_scan);
spin_unlock(&zone->lru_lock);
done:
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-09-08 14:29    [W:0.265 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site