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Message-ID: <1282406337.4c6ff7c1533ad@imp.free.fr> Date: Sat, 21 Aug 2010 17:58:57 +0200 From: castet.matthieu@...e.fr To: linux-kernel@...r.kernel.org Subject: is VM_GROWSDOWN still useful 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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