Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels

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Subject: Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
From: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Date: Mon, 30 Nov 2009 10:23:37 -0600 (CST)
Cc: Gleb Natapov <gleb@xxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, avi@xxxxxxxxxx, mingo@xxxxxxx, tglx@xxxxxxxxxxxxx, hpa@xxxxxxxxx, riel@xxxxxxxxxx
In-reply-to: <1259579114.20516.136.camel@laptop>
References: <1258985167-29178-1-git-send-email-gleb@xxxxxxxxxx> <1258985167-29178-11-git-send-email-gleb@xxxxxxxxxx> <1258990455.4531.594.camel@laptop> <20091123155851.GU2999@xxxxxxxxxx> <alpine.DEB.2.00.0911231128190.785@xxxxxxxxxxx> <20091124071250.GC2999@xxxxxxxxxx> <alpine.DEB.2.00.0911240906360.14045@xxxxxxxxxxx> <20091130105612.GF30150@xxxxxxxxxx> <20091130105812.GG30150@xxxxxxxxxx> <1259578793.20516.130.camel@laptop> <1259579114.20516.136.camel@laptop>
User-agent: Alpine 2.00 (DEB 1167 2008-08-23)

Ok so there is some variance in tests as usual due to cacheline placement.
But it seems that overall we are looking at a 1-2% regression.

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References:
- [PATCH v2 00/12] KVM: Add asynchronous page fault for PV guest.
  - From: Gleb Natapov
- [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Gleb Natapov
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Peter Zijlstra
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Gleb Natapov
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Christoph Lameter
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Gleb Natapov
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Christoph Lameter
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Gleb Natapov
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Gleb Natapov
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Peter Zijlstra
- Re: [PATCH v2 10/12] Maintain preemptability count even for !CONFIG_PREEMPT kernels
  - From: Peter Zijlstra

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