Re: [CRASH] gdth / __block_prepare_write: zeroing uptodate buffer! / NMI Watchdog detected LOCKUP

[Andrea Arcangeli]

On Tue, Feb 26, 2002 at 11:20:06AM -0800, Andrew Morton wrote:
> Florian Lohoff wrote:
> > 
> > On Tue, Feb 26, 2002 at 11:04:55AM -0800, Andrew Morton wrote:
> > > > __block_prepare_write: zeroing uptodate buffer!
> > >
> > > Yup.   This happens when the disk fills up.  Andrea and I were
> > > discussing it over the weekend.   There's a new patch in the -aa
> > > kernels which doesn't quite fix it :(
> > >
> > > We'll fix it in 2.4.19-pre somehow.  It's possible that this problem
> > > causes a chnuk of zeroes to be written into the file when you hit
> > > ENOSPC, which is rather rude.  But your file was truncated anyway.
> > 
> > I dont think the machine had full filesystems at all.
> 
> I/O error when reading filesystem metadata would also cause it.

Indeed. Looks like gdth gone wild and that triggered the cleanup slowpath.

Andrea