Re: [md PATCH 8/8] md: Use revalidate_disk to effect changes in size of device.

[Neil Brown]

On Wednesday August 5, hpa@xxxxxxxxx wrote:
> On 08/05/2009 06:03 PM, Mike Snitzer wrote:
> > On Wed, Aug 5, 2009 at 6:07 PM, H. Peter Anvin<hpa@xxxxxxxxx> wrote:
> >> On 08/02/2009 02:58 PM, NeilBrown wrote:
> >>> As revalidate_disk calls check_disk_size_change, it will cause
> >>> any capacity change of a gendisk to be propagated to the blockdev
> >>> inode.  So use that instead of mucking about with locks and
> >>> i_size_write.
> >>>
> >>> Also add a call to revalidate_disk in do_md_run and a few other places
> >>> where the gendisk capacity is changed.
> >>>
> >> This patch causes my Fedora 11 system with all filesystems on RAID-1 to
> >> not boot (it hangs in early userspace, Ctrl-Alt-Del reboots the system.)
> > 
> > I reported similar findings, with some more detail, relative to
> > Fedora's rawhide here:
> > http://lkml.org/lkml/2009/8/5/275
> 
> Sounds to be the same, yes.

Thanks for the reports guys.

I managed to reproduce the lockup and I think this patch should fix
it.
If you could review/test I would appreciate it.

Thanks,
NeilBrown