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| author | Ian Campbell <[email protected]> | 2010-02-26 17:16:00 +0000 |
|---|---|---|
| committer | H. Peter Anvin <[email protected]> | 2010-02-27 22:41:01 +0000 |
| commit | 817a824b75b1475f1b067c8cee318c7b4d66fcde (patch) | |
| tree | 72c786e2d821344c377fe4f0b233408043c7b89a /net/lapb/lapb_in.c | |
| parent | x86, mm: Unify kernel_physical_mapping_init() API (diff) | |
| download | kernel-817a824b75b1475f1b067c8cee318c7b4d66fcde.tar.gz kernel-817a824b75b1475f1b067c8cee318c7b4d66fcde.zip | |
x86, xen: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y
There's a path in the pagefault code where the kernel deliberately
breaks its own locking rules by kmapping a high pte page without
holding the pagetable lock (in at least page_check_address). This
breaks Xen's ability to track the pinned/unpinned state of the
page. There does not appear to be a viable workaround for this
behaviour so simply disable HIGHPTE for all Xen guests.
Signed-off-by: Ian Campbell <[email protected]>
LKML-Reference: <[email protected]>
Cc: Jeremy Fitzhardinge <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Pasi Kärkkäinen <[email protected]>
Cc: <[email protected]> # .32.x: 14315592: Allow highmem user page tables to be disabled at boot time
Cc: <[email protected]> # .32.x
Cc: <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Diffstat (limited to 'net/lapb/lapb_in.c')
0 files changed, 0 insertions, 0 deletions