From owner-freebsd-bugs  Tue Feb  3 18:10:03 1998
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Date: Tue, 3 Feb 1998 18:10:02 -0800 (PST)
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From: KATO Takenori <kato@migmatite.eps.nagoya-u.ac.jp>
Subject: Re: kern/5634: locking violation in umapfs
Reply-To: KATO Takenori <kato@migmatite.eps.nagoya-u.ac.jp>
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The following reply was made to PR kern/5634; it has been noted by GNATS.

From: KATO Takenori <kato@migmatite.eps.nagoya-u.ac.jp>
To: FreeBSD-gnats-submit@FreeBSD.ORG
Cc:  Subject: Re: kern/5634: locking violation in umapfs
Date: Wed, 04 Feb 1998 11:02:47 +0900

 KATO Takenori <kato@migmatite.eps.nagoya-u.ac.jp> wrote:
 
 > The umap_node_find() calls vget at flags = 0.  This code assumes that
 > vget() does not lock vnode in it.  It is true in 4.4BSD-Lite2 but
 > vget() in FreeBSD may lock vnode in it.  Therefore, we should not
 > assume that vget() does not lock vnode.
 
 Same problem exists in nullfs.
 
 ----
 KATO Takenori <kato@ganko.eps.nagoya-u.ac.jp>
 Dept. Earth Planet. Sci., Nagoya Univ.,  Nagoya, 464-01, Japan
 PGP public key: finger kato@eclogite.eps.nagoya-u.ac.jp
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