Re: [PATCH] [16/19] HWPOISON: Enable .remove_error_page for migration aware file systems

Nick Piggin
2009-08-12T08:46:17Z

On Wed, Aug 12, 2009 at 10:23:31AM +0200, Andi Kleen wrote:
> > page corruption, IMO, because by definition they should be able to
> > tolerate panic. But if they do not know about this change to -EIO
> > semantics, then it is quite possible to cause problems.
>
> There's no change really. You already have this problem with
> any metadata error, which can cause similar trouble.
> If the application handles those correctly it will also
> handle hwpoison correctly.

What do you mean metadata error?

To be clear, we're talking about safety given by a panic on any
memory error, versus safety of this hwpoison code (specifically
which removes dirty pagecache pages as -EIO).