Re: [PATCH 3/6] ksm: change the KSM_REMOVE_MEMORY_REGION ioctl.

Rik van Riel
2009-05-06T00:57:18Z

Izik Eidus wrote:
> This patch change the KSM_REMOVE_MEMORY_REGION ioctl to be specific per
> memory region (instead of flushing all the registred memory regions inside
> the file descriptor like it happen now)
>
> The previoes api was:
> user register memory regions using KSM_REGISTER_MEMORY_REGION inside the fd,
> and then when he wanted to remove just one memory region, he had to remove them
> all using KSM_REMOVE_MEMORY_REGION.
>
> This patch change this beahivor by chaning the KSM_REMOVE_MEMORY_REGION
> ioctl to recive another paramter that it is the begining of the virtual
> address that is wanted to be removed.

This is different from munmap and madvise, which take both
start address and length.

Why?

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