Attachment 317511 Details for Bug 463504 – 2.6.18 proposed patch (backported from mainline)

[patch] 2.6.18 proposed patch (backported from mainline)

linux-2.6.18-vm-shrink-zone.patch (text/plain), 1.21 KB, created by John Sobecki on 2008-09-23 18:56:08 UTC

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Creator: John Sobecki

Created: 2008-09-23 18:56:08 UTC

Size: 1.21 KB

patch

obsolete

>diff -up linux-2.6.18.x86_64/mm/vmscan.c.orig linux-2.6.18.x86_64/mm/vmscan.c
>--- linux-2.6.18.x86_64/mm/vmscan.c.orig	2008-05-15 14:24:08.767239000 -0700
>+++ linux-2.6.18.x86_64/mm/vmscan.c	2008-05-15 14:35:03.003466000 -0700
>@@ -658,6 +658,34 @@ static unsigned long shrink_inactive_lis
> 
> 		nr_scanned += nr_scan;
> 		nr_freed = shrink_page_list(&page_list, sc);
>+		
>+		/*
>+		 * If we are direct reclaiming for contiguous pages and we do
>+		 * not reclaim everything in the list, try again and wait
>+		 * for IO to complete. This will stall high-order allocations
>+		 * but that should be acceptable to the caller
>+		 */
>+
>+		if (nr_freed < nr_taken && !current_is_kswapd()) {
>+			long nr_active_pages = 0;
>+			struct page *pg;
>+
>+			blk_congestion_wait(WRITE, HZ/10);
>+
>+                        /*
>+			 * The attempt at page out may have made some
>+			 * of the pages active, mark them inactive
>+			 */
>+			list_for_each_entry(pg, &page_list, lru) {
>+				if (PageActive(pg)) {
>+					nr_active_pages++;
>+					ClearPageActive(pg);
>+				}
>+			}
>+			count_vm_events(PGDEACTIVATE, nr_active_pages);
>+			nr_freed += shrink_page_list(&page_list, sc);
>+			}
>+
> 		nr_reclaimed += nr_freed;
> 		local_irq_disable();
> 		if (current_is_kswapd()) {

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Attachments on bug 463504: 317511 | 317531 | 319367