Re: [DOCUMENTATION] Revised Unreliable Kernel Locking Guide

[Dave Jones]

On Fri, Dec 12, 2003 at 04:24:18PM +1100, Rusty Russell wrote:
 > OK, I've put the html version up for your reading pleasure: the diff
 > is quite extensive and hard to read.
 > 
 > http://www.kernel.org/pub/linux/kernel/people/rusty/kernel-locking/
 > 
 > Feedback welcome,

Hi Rusty,
 Might be worth mentioning in the Per-CPU data section that code doing
operations on CPU registers (MSRs and the like) needs to be protected
by an explicit preempt_disable() / preempt_enable() pair if it's doing
operations that it expects to run on a specific CPU.

For examples, see arch/i386/kernel/msr.c & cpuid.c

		Dave

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