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| author |   Jennifer Herbert <jennifer.herbert@citrix.com> | 2015-01-05 15:07:46 +0000 |
|---|---|---|
| committer |   David Vrabel <david.vrabel@citrix.com> | 2015-01-28 14:03:15 +0000 |
| commit | 745282256c754ac5ed3dbe2fbef6471dc1373417 (patch) | |
| tree | 9dbec8c554c05a2dde6dad9c040dba740486c077 /include/xen | |
| parent | xen/gntdev: convert priv->lock to a mutex (diff) | |
| download | linux-dev-745282256c754ac5ed3dbe2fbef6471dc1373417.tar.xz linux-dev-745282256c754ac5ed3dbe2fbef6471dc1373417.zip | |
xen/gntdev: safely unmap grants in case they are still in use
Use gnttab_unmap_refs_async() to wait until the mapped pages are no
longer in use before unmapping them.
This allows userspace programs to safely use Direct I/O and AIO to a
network filesystem which may retain refs to pages in queued skbs after
the filesystem I/O has completed.
Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'include/xen')
0 files changed, 0 insertions, 0 deletions