Re: [PATCH v4 3/3] qspinlock, x86: Add x86 specific optimization for 2 contending tasks

From: Waiman Long
Date: Fri Feb 21 2014 - 12:08:35 EST


On 02/21/2014 07:12 AM, Peter Zijlstra wrote:

Why is this x86 only code?

The code is making use of the fact that byte write is atomic which is true in x86 and probably in a few other architectures. I could pull these codes into the generic qspinlock.c file and set a flag in the asm header file to activate it if it is what you want.

-Longman
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