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On Fri, 2009-01-23 at 08:45 -0800, Grant wrote: |
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> >> >> My website seems a bit slower since I enabled grsecurity on that |
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> >> >> system. Is that typical? Is it most likely due to MPROTECT, or |
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> >> >> something else? |
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> >> > |
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> >> > can you quantify this slowdown? and what grsec/pax features did you enable? |
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> >> |
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> >> I enabled the grsecurity "Gentoo (server)" profile in the hardened |
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> >> kernel. |
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> > |
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> > ok, is PAGEEXEC enabled (and SEGMEXEC isn't) and is your cpu some P4 variant |
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> > without NX support? that's about the only situation where you should see an |
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> > observable slowdown, otherwise i doubt you can percieve a few % without |
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> > actual measurements. so if neither is your case, it's definitely worth an |
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> > investigation. |
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> |
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> Very close. PAGEEXEC is enabled, but so is SEGMEXEC. My CPU is a |
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> P4-2.8, and I'm not sure about NX support but these are the flags: |
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Disable PAGEEXEC and switch to SEGMEXEC on the P4. That slowdown will go |
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away. No idea why on earth the (server) options would enable such a |
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thing on the x86 platform. |
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-- |
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Ned Ludd <solar@g.o> |
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Gentoo Linux |
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