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SubjectRe: [PATCH, v3] shmat: introduce flag SHM_MAP_NOT_FIXED
> If SHM_MAP_NOT_FIXED specified and shmaddr is not NULL, then the kernel takes
> shmaddr as a hint about where to place the mapping. The address of the mapping
> is returned as the result of the call.
> It's similar to mmap() without MAP_FIXED.


Sorry, no.
This description still doesn't explain why this interface is needed.

The one of the points is this interface is used by another person or not.
You should explain how large this interface benefit has.

Andi kleen explained this interface _can_ be used another one.
but nobody explain who use it actually.

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