Re: [PATCH 2.5.66-mm2] Fix page_convert_anon locking issues

Andrew Morton (akpm@digeo.com)
Wed, 2 Apr 2003 15:52:20 -0800

Dave McCracken <dmccr@us.ibm.com> wrote:
>
>
> Oops. The pmd_present() check should be after the page_to_pfn() !=
> pte_pfn() check.
>

hmmmm. It also probably needs both compiler barriers and memory barriers.

It does give me creepy feelings. I worry that because nobody uses
remap_file_pages() yet, we will hit 2.6.25 before discovering that we have
fundamental VM locking problems which affect $major$ applications.

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