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Merge vfs_subr.c:1.641 from HEAD to RELENG_6:

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Silence "busy" warnings when unmounting devfs at system shutdown.  This
  is a workaround for non-symetric teardown of the file systems at
  shutdown with respect to the mount order at boot.  The proper long term
  fix is to properly detach devfs from the root mount before unmounting
  each, and should be implemented, but since the problem is non-harmful,
  this temporary band-aid will prevent false positive bug reports and
  unnecessary error output for 6.0-RELEASE.

  Tested by:      pav, pjd

Approved by:	re (scottl)
This commit is contained in:
rwatson 2005-08-23 01:50:19 +00:00
parent 2d603d9e8f
commit bf826e6d59
1 changed files with 16 additions and 6 deletions
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22
sys/kern/vfs_subr.c
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@ -2711,12 +2711,22 @@ vfs_unmountall()
error = dounmount(mp, MNT_FORCE, td);
if (error) {
TAILQ_REMOVE(&mountlist, mp, mnt_list);
printf("unmount of %s failed (",
mp->mnt_stat.f_mntonname);
if (error == EBUSY)
printf("BUSY)\n");
else
printf("%d)\n", error);
/*
* XXX: Due to the way in which we mount the root
* file system off of devfs, devfs will generate a
* "busy" warning when we try to unmount it before
* the root. Don't print a warning as a result in
* order to avoid false positive errors that may
* cause needless upset.
*/
if (strcmp(mp->mnt_vfc->vfc_name, "devfs") != 0) {
printf("unmount of %s failed (",
mp->mnt_stat.f_mntonname);
if (error == EBUSY)
printf("BUSY)\n");
else
printf("%d)\n", error);
}
} else {
/* The unmount has removed mp from the mountlist */
}