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SubjectRe: madvise MADV_DONTFORK/MADV_DOFORK


On Mon, 13 Feb 2006, Michael S. Tsirkin wrote:
>
> Add madvise options to control whether memory range is inherited across fork.
> Useful e.g. for when hardware is doing DMA from/into these pages.
>
> Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
>
> - if (mpnt->vm_flags & VM_DONTCOPY) {
> + if (mpnt->vm_flags & (VM_DONTCOPY | VM_DONTFORK)) {

Why?

That VM_DONTCOPY _is_ DONTFORK.

Don't add a new useless DONTFORK that doesn't have any value.

Linus
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