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(parent: 1c38ad2) | patch
NFS: Fix a race between mmap() and O_DIRECT
authorTrond Myklebust <trond.myklebust@primarydata.com>
Sun, 28 Jan 2018 14:29:41 +0000 (09:29 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 16 Feb 2018 19:22:59 +0000 (20:22 +0100)
commitf1e31607e73d5f4546ff8d1e40e1153230392188
tree94a1eaabff124784cc6d521770e146775999d934tree | snapshot (tar.gz zip)
parent1c38ad2f26d8511cde75ce5767313e8c3e789d69commit | diff
NFS: Fix a race between mmap() and O_DIRECT

commit e231c6879cfd44e4fffd384bb6dd7d313249a523 upstream.

When locking the file in order to do O_DIRECT on it, we must unmap
any mmapped ranges on the pagecache so that we can flush out the
dirty data.

Fixes: a5864c999de67 ("NFS: Do not serialise O_DIRECT reads and writes")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/nfs/io.c diff | blob | blame | history