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Re: [Qemu-devel] [PATCH] tcg: Remove stack protection from helper functi

From: Mulyadi Santosa
Subject: Re: [Qemu-devel] [PATCH] tcg: Remove stack protection from helper functions
Date: Mon, 26 Sep 2011 15:01:07 +0700


On Mon, Sep 26, 2011 at 14:46, Jan Kiszka <address@hidden> wrote:
> This increases the overhead of frequently executed helpers.
> Signed-off-by: Jan Kiszka <address@hidden>

IMHO, stack protector setup put more stuffs during epilogue, but quite
likely it is negligible unless it cause too much L1 cache misses. So,
I think this micro tuning is somewhat unnecessary but still okay.
Security wise, I think it's better to just leave it as is like now.


Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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