linux-kernel - Re: [PATCH] kvm: add halt_poll

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Date:	Mon, 09 Feb 2015 16:22:05 +0800
From:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
To:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
CC:	riel@...hat.com, mtosatti@...hat.com, rkrcmar@...hat.com,
	jan.kiszka@...mens.com, dmatlack@...gle.com
Subject: Re: [PATCH] kvm: add halt_poll_ns module parameter



On 02/06/2015 08:48 PM, Paolo Bonzini wrote:

>
> +unsigned int halt_poll_ns = 0;
> +module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR);
> +

Can we make this parameter be changeable? So that we can tune it
on the fly.

>   	finish_wait(&vcpu->wq, &wait);
> +	cur = ktime_get();

We can move this into the tracepoint to avoid the workload if the
tracepoint is not enabled.

Otherwise looks good to me.

Reviewed-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
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