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Date: Mon, 27 Jul 2015 13:10:43 +0200
From: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
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To: Davidlohr Bueso <dave@stgolabs.net>, Peter Zijlstra <peterz@infradead.org>
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Subject: Re: Revised futex(2) man page for review
References: <55166C01.7000803@gmail.com>	 <20150328114725.GJ27490@worktop.programming.kicks-ass.net> <1427813146.20009.2.camel@stgolabs.net>
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Hi David,

On 03/31/2015 04:45 PM, Davidlohr Bueso wrote:
> On Sat, 2015-03-28 at 12:47 +0100, Peter Zijlstra wrote:
> 
>>        The condition is represented by the futex word, which is an address  in
>>        memory  supplied to the futex() system call, and the value at this mem‐
>>        ory location.  (While the virtual addresses for the same memory in sep‐
>>        arate  processes  may  not be equal, the kernel maps them internally so
>>        that the same memory mapped in different locations will correspond  for
>>        futex() calls.)
>>
>>        When  executing  a futex operation that requests to block a thread, the
>>        kernel will only block if the futex word has the value that the calling
> 
> Given the use of "word", you should probably state right away that
> futexes are only 32bit.

So, I made the opening sentence here:

       The  condition  is  represented  by  the  futex word, which is an
       address in memory supplied to the futex() system  call,  and  the
       32-bit  value  at  this  memory  location. 

Okay?

Cheers,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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