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From: castet.matthieu@free.fr
To: linux-kernel@vger.kernel.org
Subject: is VM_GROWSDOWN still useful
Date: Sat, 21 Aug 2010 17:58:57 +0200	[thread overview]
Message-ID: <1282406337.4c6ff7c1533ad@imp.free.fr> (raw)

Hi,

I am wondering if the flags GROWSDOWN/GROWSUP is still useful on linux today. It
is only used for the main thread stack.
Stack allocated by pthread doesn't use anymore GROWSDOWN because you can't
guaranty that a user mapping (via mmap) will collide with it.

Why not doing the same for the main thread : allocate a stack of the rlimit size
?

Linux memory allocation use over-commit, and physical memory will only be
allocated when the stack is really used.

Or are they real usage of GROWSDOWN ?

Matthieu

                 reply	other threads:[~2010-08-21 15:59 UTC|newest]

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