netdev - Re: setsockopt()

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Message-ID: <20080708014840.GA25173@fieldses.org>
Date:	Mon, 7 Jul 2008 21:48:40 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Rick Jones <rick.jones2@...com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	aglo@...i.umich.edu, shemminger@...tta.com, rees@...ch.edu
Subject: Re: setsockopt()

On Mon, Jul 07, 2008 at 06:15:01PM -0700, Rick Jones wrote:
> Rick Jones wrote:
>> David Miller wrote:
>>
>>> We need 2x, in order to have a full window during recovery.
>>>
>>> There was a measurement bug found a few months ago when the
>>> google folks were probing in this area, which was fixed
>>> by John Heffner.  Most of which had to deal with TSO subtleties.
>>>
>>> --------------------
>>> commit 246eb2af060fc32650f07203c02bdc0456ad76c7
>>> ...
>>> commit ce447eb91409225f8a488f6b7b2a1bdf7b2d884f
>>> ...
>> I'll try my tests again with newer kernels since I'm not 100% certain I 
>> was trying with those commits in place.
>
> Did those commits make it into 2.6.26-rc9?  (Gentle taps of clue-bat as  
> to how to use git to check commits in various trees would be welcome -  
> to say I am a git noob would be an understatement - the tree from which  
> that kernel was made was cloned from Linus' about 16:00 to 17:00 pacific  
> time)

"git describe --contains", will tell you the first tag git finds
containing the given commit:

	bfields@...kle:linux$ git describe --contains 246eb2af060
	v2.6.26-rc1~95^2~18
	bfields@...kle:linux$ git describe --contains ce447eb9140
	v2.6.26-rc1~95^2~19

So both were already in 2.6.25-rc1.

Or if you forget that, another trick is to note that git log A..B really
means "tell me all the commits contained in B but not in A".  So "git
log A..B" returns output if (and only if) B is not contained in A.  For
example, if "git log HEAD..246eb2af060" returns without any output, then
you know that 246eb2af060 is contained in the head of the currently
checked-out branch.

--b.
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