Re: [PATCH v6] add MAP_UNLOCKED mmap flag

From: Gleb Natapov
Date: Mon Jan 18 2010 - 09:35:41 EST

On Mon, Jan 18, 2010 at 02:32:32PM +0000, Alan Cox wrote:
> > this kind of control. As of use of mlockall(MCL_FUTURE) how can I make
> > sure that all memory allocated behind my application's back (by dynamic
> > linker, libraries, stack) will be locked otherwise?
> If you add this flag you can't do that anyway - some library will
> helpfully start up using it and then you are completely stuffed or will
> be back in two or three years adding MLOCKALL_ALWAYS.
Libraries can do many other bad things. They can do mlockall(0) today
too and this is not the reason to ditch mlockall(). I don't expect libc will
do that though.

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