kern/132068: [zfs] page fault when using ZFS over NFS on 7.1-RELEASE/amd64

[Edward Fisk]

The following reply was made to PR kern/132068; it has been noted by GNATS.

From: "Edward Fisk" <7ogcg7g02 at sneakemail.com>
To: bug-followup at freebsd.org
Cc:  
Subject: Re: kern/132068: [zfs] page fault when using ZFS over NFS on
 7.1-RELEASE/amd64
Date: 5 Mar 2009 11:46:25 -0000

 I've tried the patch kindly supplied by Jaakko, but the machine still deadlocks (no panic though).  I then did a source upgrade to 8.0-CURRENT (20090227).  The machine would still deadlock every 1-2 hours under the same load.  I've now added the following deadlock debugging options:
 
 options INVARIANTS
 options INVARIANT_SUPPORT
 options WITNESS
 options DEBUG_LOCKS
 options DEBUG_VFS_LOCKS
 options DIAGNOSTIC
 
 Unfortunately, the machine has now been running for over 48 hours without a crash, while still being under the same load/usage pattern.  -Ed