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/freebsd-11-stable/sys/kern/
H A Dvfs_default.cdiff 276192 Wed Dec 24 21:02:02 MST 2014 rmacklem Modify vop_stdadvlock{async}() so that it only
locks/unlocks the vnode and does a VOP_GETATTR()
for the SEEK_END case. This is safe to do, since
lf_advlock{async}() only uses the size argument
for the SEEK_END case.
The NFSv4 server needs this when
vfs.nfsd.enable_locallocks!=0 since locking the
vnode results in a LOR that can cause a deadlock
for the nfsd threads.

Reviewed by: kib
MFC after: 1 week

Completed in 105 milliseconds