Messages in this thread | | | Subject | Re: [PATCH] [LSM] Rework LSM hooks | From | Alan Cox <> | Date | Tue, 10 Aug 2004 16:02:01 +0100 |
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On Maw, 2004-08-10 at 15:16, James Morris wrote: > On Tue, 10 Aug 2004, Kurt Garloff wrote: > > > * Even with selinux=0 and capability loaded, the kernel takes a > > few percents in networking benchmarks (measured by HP on ia64); > > this is caused by the slowliness of indirect jumps on ia64. > > Is this just an ia64 issue? If so, then perhaps we should look at only > penalising ia64? Otherwise, loading an LSM module is going to cause > expensive false unlikely() on _every_ LSM hook.
I see this on x86-32 to an extent. Its quite visible with gigabit as you'd expect. ia64 ought to be less affected providing the compiler is doing the right things with the unconditional jumps.
Alan
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