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m2p_override
2012 Apr 03
2
[PATCH] xen/gntdev: do not set VM_PFNMAP
Since when we are using the m2p_override it is not true anymore that the
mmap''ed area doesn''t have corresponsing struct pages.
Removing the VM_PFNMAP flag makes get_user_pages work on the mmap''ed user vma.
An example test case would be using a Xen userspace block backend
(QDISK) on a file on NFS using O_DIRECT.
The patch should be backported back to 2.6.38.