git: DragonFly_RELEASE_5_6 kernel - Fix rare NFS deadlock

[Matthew Dillon]

commit 81b54a689bb87734bfe6e99d3b2d1df385864c9f
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Fri Jul 19 21:15:27 2019 -0700

    kernel - Fix rare NFS deadlock
    
    * Fix a rare NFS deadlock which can occur on UIO_NOCOPY reads
      (memory mapped accesses).  VOP_GETATTR cannot be safely called
      in this situation without deadlocking against the VM system.

Summary of changes:
 sys/vfs/nfs/nfs_bio.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/81b54a689bb87734bfe6e99d3b2d1df385864c9f


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