On 26-05-2013 17:38, Jiang Liu wrote:
Typo in the subject: s/mamaged_pages/managed_pages/.
Enhance adjust_managed_page_count() to adjust totalhigh_pages for
highmem pages. And change code which directly adjusts totalram_pages
to use adjust_managed_page_count() because it adjusts totalram_pages,
totalhigh_pages and zone->managed_pages altogether in a safe way.
Remove inc_totalhigh_pages() and dec_totalhigh_pages() from xen/balloon
driver bacause adjust_managed_page_count() has already adjusted
totalhigh_pages.
This patch also fixes two bugs:
1) enhances virtio_balloon driver to adjust totalhigh_pages when
reserve/unreserve pages.
2) enhance memory_hotplug.c to adjust totalhigh_pages when hot-removing
memory.
We still need to deal with modifications of totalram_pages in file
arch/powerpc/platforms/pseries/cmm.c, but need help from PPC experts.
Signed-off-by: Jiang Liu <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Wen Congyang <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Tang Chen <[email protected]>
Cc: Yasuaki Ishimatsu <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
drivers/virtio/virtio_balloon.c | 8 +++++---
drivers/xen/balloon.c | 23 +++++------------------
mm/hugetlb.c | 2 +-
mm/memory_hotplug.c | 16 +++-------------
mm/page_alloc.c | 10 +++++-----
5 files changed, 19 insertions(+), 40 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index bd3ae32..6649968 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
[...]
@@ -160,11 +160,13 @@ static void fill_balloon(struct virtio_balloon *vb,
size_t num)
static void release_pages_by_pfn(const u32 pfns[], unsigned int num)
{
unsigned int i;
+ struct page *page;
Why not declare it right in the *for* loop? You could use intializer
then...
/* Find pfns pointing at start of each page, get pages and free them. */
for (i = 0; i < num; i += VIRTIO_BALLOON_PAGES_PER_PAGE) {
- balloon_page_free(balloon_pfn_to_page(pfns[i]));
- totalram_pages++;
+ page = balloon_pfn_to_page(pfns[i]);
+ balloon_page_free(page);
+ adjust_managed_page_count(page, 1);
}
}
[...]
WBR, Sergei
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