Messages in this thread Patch in this message | | | From | David Hildenbrand <> | Subject | [PATCH v1] xen/balloon: Set pages PageOffline() in balloon_add_region() | Date | Fri, 27 Sep 2019 17:46:28 +0200 |
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We are missing a __SetPageOffline(), which is why we can get !PageOffline() pages onto the balloon list, where alloc_xenballooned_pages() will complain:
page:ffffea0003e7ffc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0xffffe00001000(reserved) raw: 000ffffe00001000 dead000000000100 dead000000000200 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(!PageOffline(page)) ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:744! invalid opcode: 0000 [#1] SMP NOPTI
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> Fixes: 77c4adf6a6df ("xen/balloon: mark inflated pages PG_offline") Cc: stable@vger.kernel.org # v5.1+ Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: David Hildenbrand <david@redhat.com> --- drivers/xen/balloon.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 05b1f7e948ef..29f6256363db 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -687,6 +687,7 @@ static void __init balloon_add_region(unsigned long start_pfn, /* totalram_pages and totalhigh_pages do not include the boot-time balloon extension, so don't subtract from it. */ + __SetPageOffline(page); __balloon_append(page); } -- 2.21.0
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