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Date:      Tue, 31 Mar 2015 12:01:03 -0400
From:      Eric van Gyzen <vangyzen@FreeBSD.org>
To:        John Baldwin <jhb@freebsd.org>, Randall Stewart <rrs@netflix.com>
Cc:        svn-src-head@freebsd.org, Randall Stewart <rrs@freebsd.org>, svn-src-all@freebsd.org, src-committers@freebsd.org
Subject:   Re: svn commit: r280785 - in head/sys: kern netgraph/atm/sscop netgraph/atm/uni sys
Message-ID:  <551AC4BF.40106@FreeBSD.org>
In-Reply-To: <5710983.pHS9DoOdY8@ralph.baldwin.cx>
References:  <201503281250.t2SCoOkt020297@svn.freebsd.org> <32487399.PTq7ESkWJT@ralph.baldwin.cx> <26047F0C-A975-4DAC-9077-31B5EC4902DA@netflix.com> <5710983.pHS9DoOdY8@ralph.baldwin.cx>

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>> Now as to the 
>>
>> -1 -> NOCPU
>>
>> This is like pulling on a string on your sweater.. the only sensible solution that
>> I could come up with after chatting with Lawrence is to add 
>> #include <sys/proc.h>
>> to everyone that uses the callout.h and does not have it already… (putting it into callout.h does not work) .. sigh..
>>
>> Now for this cosmetic change I end up with the following changes (and as yet I have
>> not built LINT or universe so there may be more).. I have spent about 2 hours on this
>> so far and I can at least build a kernel with the change for amd64 :-0
>>
>> Here is what has to change, do you really think that this is worth it?
>>
>> Note I did not look into moving NOCPU in proc.h it says it means no CPU is present
>> which is sort of the meaning we want.. I am not sure if the define could be moved .. but
>> that too may be yet another string...
>>
>> Is this worth it, or do you have another idea on how best to do this???
> 
> Ugh. :(  I guess leave it at -1 for now.

If you leave it as -1, you might add a /* NOCPU */ comment, for the sake of
grep.  (This could be a lost cause, for all I know, but it can't hurt.)

> Another alternative would be to
> move NOCPU to <sys/param.h> (at least for the kernel) if bde@ would allow it.
> I don't think changing all those files is appropriate.
> 
> (Also, <sys/proc.h> seems like an odd place for NOCPU now, it should really be
> in <sys/smp.h> if not param.h.  I understand why it was first added in proc.h,
> but it is now used in many more places than just td_oncpu.)

+1

Eric



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