Re: Xfs Access to block zero exception and system crash

[Sagar Borikar <sagar_borikar@xxxxxxxxxxxxxx>]

Eric Sandeen wrote:
> Sagar Borikar wrote:
>   
> > Eric Sandeen wrote:
> >     
> > > Sagar Borikar wrote:
> > >
> > >
> > >   
> > >       
> > > > There was no failure. Only the processes were stalled. System was 
> > > > operative.
> > > >     
> > > >         
> > > I'm curious, if the processes were stalled, how did you unmount the
> > > filesystem to run repair on it?
> > >
> > > -Eric
> > >   
> > >       
> > I ran with -n option.
> >
> > xfs_repair -fvn /root/test_partition
> >     
>
> oh....
>
> So, you basically ran repair on a live, mounted filesystem; it's
> expected that it would not be consistent at this point.
>
> So, the errors you are seeing on this x86 are likely not related to
> those you see on mips.  (the D state process might be interesting and
> worth looking into, but probably not related to the problem you're
> trying to solve.)
>
> -Eric
>   
Ok. But then I was surprised as why the copy is not successful. Here is 
the ps output

root     29200  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_16
root     29201  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_16
root     29202  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_14
root     29203  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_2
root     29204  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_9
root     29205  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_5
root     29206  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_3
root     29207  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_15
root     29208  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_2
root     29209  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_12
root     29210  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_10
root     29211  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_4
root     29212  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_13
root     29213  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_20
root     29214  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_20
root     29215  0.0  0.1   2088   656 ?        D    01:41   0:00 cp -f 
testfile testdir_18
root     29216  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_13
root     29217  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_1
root     29218  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_8
root     29219  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_11
root     29220  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_6
root     29221  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_6
root     29222  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_10
root     29223  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_14
root     29224  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_19
root     29225  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_12
root     29226  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_5
root     29227  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_11
root     29228  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_8
root     29229  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_4
root     29230  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_17
root     29231  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_18
root     29232  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_15
root     29233  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_7
root     29234  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_3
root     29235  0.0  0.1   2088   644 ?        D    01:41   0:00 cp -f 
testfile testfile_1
root     29236  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_17
root     29237  0.0  0.1   2088   652 ?        D    01:41   0:00 cp -f 
testfile testdir_7
root     29238  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testdir_19
root     29239  0.0  0.1   2088   648 ?        D    01:41   0:00 cp -f 
testfile testfile_9

All the the copies are pending and file size in those directories is 
constant. It is not
increasing.
And as the processes are in D state, the file system is marked as busy 
and I can't unmount
it.

Thanks
Sagar