Re: [PATCH] [3/16] POISON: Handle poisoned pages in page free
From: Andi Kleen
Date: Wed Apr 08 2009 - 02:49:26 EST
> >
> > /*
> > + * Page may have been marked bad before process is freeing it.
> > + * Make sure it is not put back into the free page lists.
> > + */
> > + if (PagePoison(page)) {
> > + /* check more flags here... */
>
> How about adding WARNING with some information(ex, pfn, flags..).
The memory_failure() code is already quite chatty. Don't think more
noise is needed currently.
Or are you worrying about the case where a page gets corrupted
by software and suddenly has Poison bits set? (e.g. 0xff everywhere).
That would deserve a printk, but I'm not sure how to reliably test for
that. After all a lot of flag combinations are valid.
-Andi
--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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