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xen/balloon: Set pages PageOffline() in balloon_add_region()

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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 <[email protected]>
Tested-by: Marek Marczykowski-Górecki <[email protected]>
Fixes: 77c4adf6a6 ("xen/balloon: mark inflated pages PG_offline")
Cc: [email protected] # v5.1+
Cc: Boris Ostrovsky <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Stefano Stabellini <[email protected]>
Signed-off-by: David Hildenbrand <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
Signed-off-by: Boris Ostrovsky <[email protected]>
This commit is contained in:
David Hildenbrand 2019-09-27 17:46:28 +02:00 • committed by Boris Ostrovsky
commit c5ad81eb02
1 changed files with 1 additions and 0 deletions
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1
drivers/xen/balloon.c
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@ -688,6 +688,7 @@ 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);
}