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Date: Sun, 29 Mar 2009 21:49:39 -0700
From: Julian Elischer <julian@elischer.org>
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To: David Xu <davidxu@freebsd.org>
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Cc: Scott Long <scottl@samsco.org>, Sergey Babkin <babkin@verizon.net>,
	freebsd-hackers@freebsd.org, attilio@freebsd.org,
	phk@phk.freebsd.dk, freebsd-current@freebsd.org, prashant.vaibhav@gmail.com
Subject: Re: Improving the kernel/i386
	timecounter	performance	(GSoC	proposal)
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David Xu wrote:
> David Xu wrote:
>> Julian Elischer wrote:
>>
>>> depends on the hardware.
>>> anyhow I was only saying it was possible, not necessarily
>>> good or even useful.
>>>
>>>
>>
>> I had done some works for thread private page shared by kernel
>> and userland when I was doing userland spinlock, if userland asks
>> a page, kernel will allocate it and put some interesting thing in
>> it by scheduler etcs, these code may be useful.
>>
> FYI:
> http://people.freebsd.org/~davidxu/schedctl/

reading this quickly, you allocate a separately addressed page for
each thread, but,  how do you use it?