On Thu, Jun 23, 2005 at 05:30:53PM -0500, David Young wrote:
> In FreeBSD, note the ffs_sync call in ffs_mount's 'update' path,
> src/sys/ufs/ffs/ffs_vfsops.c:
> 
>                 if (fs->fs_ronly == 0 &&
>                     vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
>                         if ((error = vn_start_write(NULL, &mp, V_WAIT)) != 0)
>                                 return (error);
>                         /*
>                          * Flush any dirty data.
>                          */
>                         if ((error = ffs_sync(mp, MNT_WAIT, td)) != 0) {
>                                 vn_finished_write(mp);
>                                 return (error);
>                         }
>                         /*
>                          * Check for and optionally get rid of files open
>                          * for writing.
>                          */
>                         flags = WRITECLOSE;
>                         if (mp->mnt_flag & MNT_FORCE)
>                                 flags |= FORCECLOSE;
>                         if (mp->mnt_flag & MNT_SOFTDEP) {
>                                 error = softdep_flushfiles(mp, flags, td);
>                         } else {
>                                 error = ffs_flushfiles(mp, flags, td);
>                         }
> 

Here is a patch for NetBSD that adds an ffs_sync to rw->ro transitions.
It doesn't make any difference for my problem.

Dave

-- 
David Young             OJC Technologies
dyoung@ojctech.com      Urbana, IL * (217) 278-3933