Re: missing madvise functionality

[Rik van Riel]

Jeremy Fitzhardinge wrote:
> Eric Dumazet wrote:
> > mmap()/brk() must give fresh NULL pages, but maybe
> > madvise(MADV_DONTNEED) can relax this requirement (if the pages were
> > reclaimed, then a page fault could bring a new page with random content) 
>
> Only if those pages were originally from that process.  Otherwise you've
> got a bit of an information leak there.

Or from another process by the same user, in the same security
context.  That gets a bit more complex though :)

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