Re: [Lsf10-pc] Current MM topics for LSF10/MM Summit 8-9 August in Boston

Andrea Arcangeli
2010-06-21T14:29:53Z

On Mon, Jun 21, 2010 at 05:18:56PM +0300, Gleb Natapov wrote:
> Avi did the fix. We discussed using MADV_DONTFORK for that, but calling
> madvise() from kernel deemed to be messy.

Agree that calling madvise looks messy. It's possible to set
VM_DONTCOPY under mmap_sem write mode and it'll work as well.

But surely we can as well keep this quicker fix until the fork vs gup
race is fixed, and back it out later.

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