From 3d65c9488cadd2f11bd4d60c7266e639ece5d0d6 Mon Sep 17 00:00:00 2001 From: Gianluca Guida Date: Thu, 30 Jul 2009 22:54:36 +0100 Subject: Xen balloon: fix totalram_pages counting. Change totalram_pages when a single page is added/removed to the ballooned list. This avoid totalram_pages to be set erroneously to max_pfn at boot. Signed-off-by: Gianluca Guida Signed-off-by: Jeremy Fitzhardinge Cc: Stable Kernel --- drivers/xen/balloon.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index d31505b..6eb6265 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -136,6 +136,8 @@ static void balloon_append(struct page *page) list_add(&page->lru, &ballooned_pages); balloon_stats.balloon_low++; } + + totalram_pages--; } /* balloon_retrieve: rescue a page from the balloon, if it is not empty. */ @@ -156,6 +158,8 @@ static struct page *balloon_retrieve(void) else balloon_stats.balloon_low--; + totalram_pages++; + return page; } @@ -260,7 +264,6 @@ static int increase_reservation(unsigned long nr_pages) } balloon_stats.current_pages += nr_pages; - totalram_pages = balloon_stats.current_pages; out: spin_unlock_irqrestore(&balloon_lock, flags); @@ -323,7 +326,6 @@ static int decrease_reservation(unsigned long nr_pages) BUG_ON(ret != nr_pages); balloon_stats.current_pages -= nr_pages; - totalram_pages = balloon_stats.current_pages; spin_unlock_irqrestore(&balloon_lock, flags); @@ -422,7 +424,6 @@ static int __init balloon_init(void) pr_info("xen_balloon: Initialising balloon driver.\n"); balloon_stats.current_pages = min(xen_start_info->nr_pages, max_pfn); - totalram_pages = balloon_stats.current_pages; balloon_stats.target_pages = balloon_stats.current_pages; balloon_stats.balloon_low = 0; balloon_stats.balloon_high = 0; -- cgit v1.1