Re: [PATCH 4/4] add ksm kernel shared memory driver.

Andrea Arcangeli
2009-04-16T11:40:33Z

On Wed, Apr 15, 2009 at 05:43:03PM -0700, Jeremy Fitzhardinge wrote:
> Shouldn't that be kmap_atomic's job anyway? Otherwise it would be hard to

No because those are full noops in no-highmem kernels. I commented in
other email why I think it's safe thanks to the wrprotect + smp tlb
flush of the userland PTE.