Re: [RFC 4/7] mm: factor out madvise's core functionality

[Michal Hocko]

On Tue 21-05-19 08:36:28, Oleksandr Natalenko wrote:
[...]
> Regarding restricting the hints, I'm definitely interested in having
> remote MADV_MERGEABLE/MADV_UNMERGEABLE. But, OTOH, doing it via remote
> madvise() introduces another issue with traversing remote VMAs reliably.
> IIUC, one can do this via userspace by parsing [s]maps file only, which
> is not very consistent, and once some range is parsed, and then it is
> immediately gone, a wrong hint will be sent.
> 
> Isn't this a problem we should worry about?

See http://lkml.kernel.org/r/20190520091829.GY6836@xxxxxxxxxxxxxx

-- 
Michal Hocko
SUSE Labs