Re: Bugs in 2.5.28 [scsi/framebuffer/devfs/floppy/ntfs/trident]

From: Nico Schottelius (
Date: Thu Aug 01 2002 - 06:50:47 EST

Anton Altaparmakov [Tue, Jul 30, 2002 at 05:28:05PM +0100]:
> At 18:57 31/07/02, Nico Schottelius wrote:
> >Just wanted to report of the following problems:
> >
> >Other bugs:
> >- ntfs sometimes crashes the system: working on a loopback file caused
> > ntfs to report corruptions in the file system and this hangs system
> > completly.
> >
> >If you need more informations, just tell me. Currently I've some time
> >to debug parts of the kernel.
> I am interested in this ntfs report. Which way round was the loopback file?
> I.e. did you mount: mount -t ntfs -o loop somefile_on_a_non_ntfs_partition
> or did you mount: mount -t some_file_system -o loop
> somefile_on_an_ntfs_partion?

mount -t ntfs -o loop file.sav-on-ext2-or-on-xfs[when using 2.4.18] /mnt

> Can you send me the errors produced? If there is an oops, please decode and
> send it, too.

The test I did was the following [may I call that test ?]:

cd /mnt; mkdir /ntfs_on_ext3; cp -r * /ntfs_on_ext3
While copying, with or without debug, the system hangs, but top only reports
7 % cpu load.

Copying the files results in a input / output error.

It has never been an oops and actually 2.5.29 does _not_ hangup anymore!
Still it stops to copy the files and aborts.
I am currently retrying with debug enabled...

> Also it may be useful to have the debug output from ntfs (depending on what
> the errors/oops say - they may be sufficient to pinpoint the problem), i.e.
> enable debugging when configuring the kernel, and then as root do: echo 1 >
> /proc/sys/fs/ntfs-debug. Note this will absolutely flood you with debug
> output so the system will run slow as hell... So it is best to only enable
> debug messages just before the error occurs if that is possible.

oops. forget that above. Oh yes, ntfs is really reporting much.
You can find the output at, it's about
600k compressed.

I am really happy that this time the cp did not hald my system!


p.s.: what was the maximal file size on ext3 ? I just gunzipped a 4gb
      file (the ntfs image the whole story is about), which could not
      be transfered through scp/ftp in this size...

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