Re: [PATCH V2] xfstests: Test filesystem lockup on full overprovisioned dm-thin

[Carlos Maiolino <cmaiolino@redhat.com>]

On Fri, Jul 14, 2017 at 11:46:40AM +0800, Eryu Guan wrote:
> On Thu, Jul 13, 2017 at 11:42:59AM -0400, Brian Foster wrote:
> > On Thu, Jul 13, 2017 at 03:12:08PM +0200, Carlos Maiolino wrote:
> > > With thin devices, it's possible to have a virtual device larger than
> > > the physical device itself, and such situation can cause problems to
> > > filesystems, once the filesystem 'believe' to have more space than it
> > > actually has.
> > > 
> > > This can lead the filesystem to several weird behaviors. The one tested
> > > here is filesystem lockup.
> > > 
> > > In case of XFS, it locks up when trying to writeback AIL metadata back
> > > to the filesystem, but, once there is no physical space available, XFS
> > > locks up and do not gracefuly handle this case.
> > > 
> > > Other filesystems usually are remounted as read-only, so they already
> > > have this situation covered.
> > > 
> > > Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com>
> 

Somehow these messages were marked as read on my MUA.

Thanks for the review folks.

Time to finish the kernel fix for this test

Cheers

-- 
Carlos