Re: [PATCH] x86_64: Patch paravirt inline replacements when loadingmodules

From: Anders H Kaseorg
Date: Sat Jun 28 2008 - 18:46:40 EST


On Sat, 28 Jun 2008, H. Peter Anvin wrote:
Not having looked at this in detail, is this a *current* problem or a *future* problem, i.e. does it fix a bug that's currently in the kernel?

It's a current problem. The current situation is that .parainstructions are patched into the kernel core and modules on i386, but only the kernel core on x86_64. This results in a slight performance regression in x86_64 modules, compared to the situation before .parainstructions existed. My patch restores full performance of x86_64 modules.

Anders

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