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Date: Tue, 20 Feb 2018 12:54:42 -0800
From: Matthew Wilcox <>
To: Igor Stoppa <>
Subject: Re: [PATCH 3/6] struct page: add field for vm_struct

On Tue, Feb 20, 2018 at 09:53:30PM +0200, Igor Stoppa wrote:
> The patch relies on the function vmalloc_to_page ... which will return
> NULL when applied to huge mappings, while the original implementation
> will still work.

Huh?  vmalloc_to_page() should work for huge mappings...

> It was found while testing on a configuration with framebuffer.

... ah.  You tried to use vmalloc_to_page() on something which wasn't
backed by a struct page.  That's *supposed* to return NULL, but my
guess is that after this patch it returned garbage.

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