diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2020-12-02 17:12:45 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2020-12-13 15:06:10 +0000 |
| commit | d1df458cbfdb0c3384c03c7fbcb1689bc02a746c (patch) | |
| tree | beb19693f61322a53297b89b64210a17f142213e /drivers/hv | |
| parent | 7f3f227b41e81f8669e906c49a240c1678c65cfe (diff) | |
| download | linux-d1df458cbfdb0c3384c03c7fbcb1689bc02a746c.tar.gz | |
hv_balloon: do adjust_managed_page_count() when ballooning/un-ballooning
Unlike virtio_balloon/virtio_mem/xen balloon drivers, Hyper-V balloon driver does not adjust managed pages count when ballooning/un-ballooning and this leads to incorrect stats being reported, e.g. unexpected 'free' output. Note, the calculation in post_status() seems to remain correct: ballooned out pages are never 'available' and we manually add dm->num_pages_ballooned to 'commited'. Suggested-by: David Hildenbrand <david@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201202161245.2406143-3-vkuznets@redhat.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hv_balloon.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index da3b6bd2367c..8c471823a5af 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1198,6 +1198,7 @@ static void free_balloon_pages(struct hv_dynmem_device *dm, __ClearPageOffline(pg); __free_page(pg); dm->num_pages_ballooned--; + adjust_managed_page_count(pg, 1); } } @@ -1238,8 +1239,10 @@ static unsigned int alloc_balloon_pages(struct hv_dynmem_device *dm, split_page(pg, get_order(alloc_unit << PAGE_SHIFT)); /* mark all pages offline */ - for (j = 0; j < alloc_unit; j++) + for (j = 0; j < alloc_unit; j++) { __SetPageOffline(pg + j); + adjust_managed_page_count(pg + j, -1); + } bl_resp->range_count++; bl_resp->range_array[i].finfo.start_page = |