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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-15 00:37:31 +0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-23 19:52:16 +0400 |
| commit | 785f62314984ea3af9dd830b020289ba2509ae69 (patch) | |
| tree | cf0c1b8da0c2b9374e537e6310b2e8b584e37f2e /Documentation/SubmittingDrivers | |
| parent | 3aca7fbc8ede0dd194317b2e3144815128ffb232 (diff) | |
| download | linux-785f62314984ea3af9dd830b020289ba2509ae69.tar.xz | |
xen/mmu: Release just the MFN list, not MFN list and part of pagetables.
We call memblock_reserve for [start of mfn list] -> [PMD aligned end
of mfn list] instead of <start of mfn list> -> <page aligned end of mfn list].
This has the disastrous effect that if at bootup the end of mfn_list is
not PMD aligned we end up returning to memblock parts of the region
past the mfn_list array. And those parts are the PTE tables with
the disastrous effect of seeing this at bootup:
Write protecting the kernel read-only data: 10240k
Freeing unused kernel memory: 1860k freed
Freeing unused kernel memory: 200k freed
(XEN) mm.c:2429:d0 Bad type (saw 1400000000000002 != exp 7000000000000000) for mfn 116a80 (pfn 14e26)
...
(XEN) mm.c:908:d0 Error getting mfn 116a83 (pfn 14e2a) from L1 entry 8000000116a83067 for l1e_owner=0, pg_owner=0
(XEN) mm.c:908:d0 Error getting mfn 4040 (pfn 5555555555555555) from L1 entry 0000000004040601 for l1e_owner=0, pg_owner=0
.. and so on.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'Documentation/SubmittingDrivers')
0 files changed, 0 insertions, 0 deletions