X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fxen%2Fballoon.c;h=2b17ad5b4b32d27277a115de4cd2fd7834f7769d;hb=555bdaefd52c386e79f98591810ceb8bab780398;hp=500290b150bb526cf27b9f5e82d9a08b160a2d91;hpb=8b66a16f25f819bb1f132f075c5c01a288776cf8;p=karo-tx-linux.git

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 500290b150bb..2b17ad5b4b32 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -50,6 +50,7 @@
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
 #include <asm/tlb.h>
+#include <asm/e820.h>
 
 #include <asm/xen/hypervisor.h>
 #include <asm/xen/hypercall.h>
@@ -119,7 +120,7 @@ static void scrub_page(struct page *page)
 }
 
 /* balloon_append: add the given page to the balloon. */
-static void balloon_append(struct page *page)
+static void __balloon_append(struct page *page)
 {
 	/* Lowmem is re-populated first, so highmem pages go at list tail. */
 	if (PageHighMem(page)) {
@@ -130,7 +131,11 @@ static void balloon_append(struct page *page)
 		list_add(&page->lru, &ballooned_pages);
 		balloon_stats.balloon_low++;
 	}
+}
 
+static void balloon_append(struct page *page)
+{
+	__balloon_append(page);
 	totalram_pages--;
 }
 
@@ -191,7 +196,7 @@ static unsigned long current_target(void)
 
 static int increase_reservation(unsigned long nr_pages)
 {
-	unsigned long  pfn, i, flags;
+	unsigned long  pfn, i;
 	struct page   *page;
 	long           rc;
 	struct xen_memory_reservation reservation = {
@@ -203,8 +208,6 @@ static int increase_reservation(unsigned long nr_pages)
 	if (nr_pages > ARRAY_SIZE(frame_list))
 		nr_pages = ARRAY_SIZE(frame_list);
 
-	spin_lock_irqsave(&xen_reservation_lock, flags);
-
 	page = balloon_first_page();
 	for (i = 0; i < nr_pages; i++) {
 		BUG_ON(page == NULL);
@@ -247,14 +250,12 @@ static int increase_reservation(unsigned long nr_pages)
 	balloon_stats.current_pages += rc;
 
  out:
-	spin_unlock_irqrestore(&xen_reservation_lock, flags);
-
 	return rc < 0 ? rc : rc != nr_pages;
 }
 
 static int decrease_reservation(unsigned long nr_pages)
 {
-	unsigned long  pfn, i, flags;
+	unsigned long  pfn, i;
 	struct page   *page;
 	int            need_sleep = 0;
 	int ret;
@@ -292,8 +293,6 @@ static int decrease_reservation(unsigned long nr_pages)
 	kmap_flush_unused();
 	flush_tlb_all();
 
-	spin_lock_irqsave(&xen_reservation_lock, flags);
-
 	/* No more mappings: invalidate P2M and add to balloon. */
 	for (i = 0; i < nr_pages; i++) {
 		pfn = mfn_to_pfn(frame_list[i]);
@@ -308,8 +307,6 @@ static int decrease_reservation(unsigned long nr_pages)
 
 	balloon_stats.current_pages -= nr_pages;
 
-	spin_unlock_irqrestore(&xen_reservation_lock, flags);
-
 	return need_sleep;
 }
 
@@ -395,7 +392,7 @@ static struct notifier_block xenstore_notifier;
 
 static int __init balloon_init(void)
 {
-	unsigned long pfn;
+	unsigned long pfn, extra_pfn_end;
 	struct page *page;
 
 	if (!xen_pv_domain())
@@ -416,10 +413,15 @@ static int __init balloon_init(void)
 	register_balloon(&balloon_sysdev);
 
 	/* Initialise the balloon with excess memory space. */
-	for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) {
+	extra_pfn_end = min(e820_end_of_ram_pfn(),
+			    (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size));
+	for (pfn = PFN_UP(xen_extra_mem_start);
+	     pfn < extra_pfn_end;
+	     pfn++) {
 		page = pfn_to_page(pfn);
-		if (!PageReserved(page))
-			balloon_append(page);
+		/* totalram_pages doesn't include the boot-time
+		   balloon extension, so don't subtract from it. */
+		__balloon_append(page);
 	}
 
 	target_watch.callback = watch_target;