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(parent: 128159f) | 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)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Mon, 29 Jan 2018 03:00:15 +0000 (22:00 -0500)
commite231c6879cfd44e4fffd384bb6dd7d313249a523
tree7894f5ccb7813ba0cd1f1717443255af510b417dtree | snapshot
parent128159f2929ef398698c28a4177eca1c1b88aa74commit | diff
NFS: Fix a race between mmap() and O_DIRECT

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>
Cc: stable@vger.kernel.org # v4.8+
fs/nfs/io.c diff | blob | history
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