tech-kern: Re: SMP re-entrancy in kernel drivers/"bottom half?"

Subject: Re: SMP re-entrancy in kernel drivers/"bottom half?"
To: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
From: Jason Thorpe <thorpej@wasabisystems.com>
List: tech-kern
Date: 12/17/2003 18:52:51

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On Dec 17, 2003, at 4:15 PM, YAMAMOTO Takashi wrote:

>>> are you suggesting a "global" SPL? (ie. not per cpu)
>>
>> Of course; thats one thing the spinlocks do.
>
> it sounds like a regression.

It is definitely a regression.  It is allowed *today* for one CPU to be 
at splclock() and another CPU to take a clock interrupt and run some 
code.

         -- Jason R. Thorpe <thorpej@wasabisystems.com>


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