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author | Andres Lagar-Cavilla <andres@lagarcavilla.org> | 2013-08-23 18:10:06 +0100 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-08-30 08:44:53 -0400 |
commit | a5deabe0e62203350369020687c3fc3b7445a0d0 (patch) | |
tree | c336f20e2618949cd250aae388060baaef4182df /drivers/xen/evtchn.c | |
parent | 669b0ae961e87c824233475e987b2d39996d4849 (diff) | |
download | linux-a5deabe0e62203350369020687c3fc3b7445a0d0.tar.bz2 |
Xen: Fix retry calls into PRIVCMD_MMAPBATCH*.
When a foreign mapper attempts to map guest frames that are paged out,
the mapper receives an ENOENT response and will have to try again
while a helper process pages the target frame back in.
Gating checks on PRIVCMD_MMAPBATCH* ioctl args were preventing retries
of mapping calls.
Permit subsequent calls to update a sub-range of the VMA, iff nothing
is yet mapped in that range.
Since it is now valid to call PRIVCMD_MMAPBATCH* multiple times, only
set vma->vm_private_data if the parameters are valid and (if
necessary) the pages for the auto_translated_physmap case have been
allocated. This prevents subsequent calls from incorrectly entering
the 'retry' path when there are no pages allocated etc.
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/evtchn.c')
0 files changed, 0 insertions, 0 deletions