diff options
| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-08-04 15:39:40 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-08-09 11:23:24 -0400 |
| commit | cd9151e26d31048b2b5e00fd02e110e07d2200c9 (patch) | |
| tree | e1d5d1bc01d0835ffc359aea7efbb0fbb14ba4e5 /mm | |
| parent | 73cc4bb0c79eebe1f0e92b700d9fe8d1c9b061bb (diff) | |
xen/balloon: set a mapping for ballooned out pages
Currently ballooned out pages are mapped to 0 and have INVALID_P2M_ENTRY
in the p2m. These ballooned out pages are used to map foreign grants
by gntdev and blkback (see alloc_xenballooned_pages).
Allocate a page per cpu and map all the ballooned out pages to the
corresponding mfn. Set the p2m accordingly. This way reading from a
ballooned out page won't cause a kernel crash (see
http://lists.xen.org/archives/html/xen-devel/2012-12/msg01154.html).
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
CC: alex@alex.org.uk
CC: dcrisan@flexiant.com
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions