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authorGianluca Guida <gianluca.guida@citrix.com>2009-07-30 22:54:36 +0100
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-12-04 08:13:44 -0800
commit3d65c9488cadd2f11bd4d60c7266e639ece5d0d6 (patch)
tree94790d79e492f8fee50b8d9e6a5a7043b1941eff /drivers/xen
parentb4606f2165153833247823e8c04c5e88cb3d298b (diff)
downloadlwn-3d65c9488cadd2f11bd4d60c7266e639ece5d0d6.tar.gz
lwn-3d65c9488cadd2f11bd4d60c7266e639ece5d0d6.zip
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 <gianluca.guida@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/balloon.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index d31505b6f7a4..6eb62654410a 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;