panic again

[Pavel Merdine]

Hello ,

Maybe  I was wrong, but looking at the FFS code I see that softupdates
does not work without -f :
   if (fs->fs_clean == 0) {
      fs->fs_flags |= FS_UNCLEAN;
      if (ronly || (mp->mnt_flag & MNT_FORCE)) {
           printf( "WARNING: %s was not properly dismounted\n",
                            fs->fs_fsmnt);
      } else {
           printf("WARNING: R/W mount of %s denied.  Filesystem is not clean - run fsck\n",
                            fs->fs_fsmnt);
           error = EPERM;
           goto out;
      }
   }
The clean flag does not seem to be affected by softupdates.

My  practice  tells  me  that  fsck  is  always required after unclean
shutdown if I dont use -f. So what is the purpose of softupdates then?
I repeat that maybe I'm wrong. But I just didn't see it working.

Wednesday, October 27, 2004, 12:06:07 AM, you wrote:

> On 26 Oct, Pavel Merdine wrote:

>> Sorry, I didn't explain my point thoroughly. I meant non-working
>> softupdates on non-faulty hardware. Press "Reset" on busy server with
>> many drives, mount -f (softupdates mount?) and you will surely get a
>> panic in an hour.

> mount -f does not enable softupdates.  The mount(8) man page says:

>      -f      Forces the revocation of write access when trying to downgrade a
>              filesystem mount status from read-write to read-only.  Also
>              forces the R/W mount of an unclean filesystem (dangerous; use
>              with caution).

> In this case, dangerous means that further file system damage and/or a
> system panic can happen.

> Softupdates is enabled and disabled with
> 	tunefs -n enable
> and
> 	tunefs -n disable
> on an unmounted file system.




-- 
/ Pavel Merdine