On Tue, May 6, 2014 at 2:35 PM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, 6 May 2014 17:37:24 +0300 "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> wrote:
>
>> This patchset replaces the syscall with emulation which creates new VMA on
>> each remap and remove code to support non-linear mappings.
>>
>> Nonlinear mappings are pain to support and it seems there's no legitimate
>> use-cases nowadays since 64-bit systems are widely available.
>>
>> It's not yet ready to apply. Just to give rough idea of what can we get if
>> we'll deprecated remap_file_pages().
>>
>> I need to split patches properly and write correct commit messages. And there's
>> still code to remove.
>
> hah. That's bold. It would be great if we can get away with this.
>
> Do we have any feeling for who will be impacted by this and how badly?
I *would* love to get rid of the nonlinear mappings, but I really have
zero visibility into who ended up using it. I assume it's a "Oracle on
32-bit x86" kind of thing.
I think this is more of a distro question. Plus perhaps an early patch
to just add a warning first so that we can see who it triggers for?
Linus
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