Re: [PATCH] Introduce a method to catch mmap_region (was: Recentkernel "mount" slow)

[Linus Torvalds]

On Wed, Nov 28, 2012 at 12:13 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> I dunno. Maybe there is some fundamental reason why the above is
> broken, but it seems to be a much simpler approach. Sure, you need to
> guarantee that the people who get the write-lock cannot possibly cause
> IO while holding it, but since the only reason to get the write lock
> would be to change the block size, that should be pretty simple, no?

Here is a *COMPLETELY* untested patch. Caveat emptor. It will probably
do unspeakable things to your family and pets.

                              Linus

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