On 2002-01-17 13:35:10-0600, Steve Lord wrote:
> On Thu, 2002-01-17 at 13:31, Wessel Dankers wrote:
> > On 2002-01-17 13:13:04-0600, Steve Lord wrote:
> > > Someone else just pointed out that forced shutdown is overwriting the
> > > super block - which is not good. There appear to be a bunch of dirty
> > > buffers with a zero disk address in them left behind. It is being
> > > worked on.
> > Ok, great!
> > Any idea what's causing the forced shutdown in the first place, though?
> Buffered I/O beyond 2^44 bytes into the sparse file probably. There is
> a hole in the code here. The linux VM uses a 32 bit page number
> index to index cache data. So 2^32 * 4096 is as bit as you can go.
> XFS is letting file offsets bigger than this in and not handling the
Ack. If I create the file to be exactly 2^44 bytes the problem goes away.
(mkfs fails though, ENOSPC ;)
The downside is that any user can cause a forced shutdown which is a bit
worrisome from a security perspective. =(
Wessel Dankers <wsl@xxxxxxxxxxxx>
We had to turn off that service to comply with the CDA Bill.