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Date: Mon, 25 Jun 2012 11:30:14 GMT
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To: freebsd-arm@FreeBSD.org
From: Kristof Provost <kristof@sigsegv.be>
Cc: 
Subject: Re: arm/149288: mail/dovecot causes panic during configure on
 Sheevaplug (ARM)
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The following reply was made to PR arm/149288; it has been noted by GNATS.

From: Kristof Provost <kristof@sigsegv.be>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: arm/149288: mail/dovecot causes panic during configure on
 Sheevaplug (ARM)
Date: Mon, 25 Jun 2012 13:25:29 +0200

 The problem appears to be fixed in HEAD, by commit r237367 (Enable
 deadlock avoidance code for NFS client.).
 
 As near as I can tell this fixes the panic:
 diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c
 index af0e33b..966688f 100644
 --- a/sys/fs/nfsclient/nfs_clvfsops.c
 +++ b/sys/fs/nfsclient/nfs_clvfsops.c
 @@ -1136,7 +1136,8 @@ nfs_mount(struct mount *mp)
  out:
         if (!error) {
                 MNT_ILOCK(mp);
 -               mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED);
 +               mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED |
 +                   MNTK_NO_IOPF;
                 MNT_IUNLOCK(mp);
         }
         return (error);
 
 
 I'm not quite sure why that is, but I can now run both the sample code above
 and the dovecot configure script without panics.
 
 -- 
 Kristof