Re: [Patch] cpusets: fix race in cpuset_add_file()

[Paul Jackson]

Simon wrote:
> However, your remark is welcome, since there is indeed a slight chance of 
> deadlock with my patch, but it needs 2 mkdirs racing.

Glad my confusions led to some good.

Let me think about this one a bit.

I had it in my brain that the cpuset_sem should be held across the
entire cpuset_populate_dir(), as if there would be a problem with
another task getting this lock while a directory was half populated.

But I don't know if that was a valid concern, or just a superstition on
my part.  I'll stare at this a bit more, and get back to you, either
way.

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@xxxxxxx> 1.650.933.1373
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