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Date: Sat, 15 Nov 2014 11:03:23 -0800
From: Alfred Perlstein <bright@mu.org>
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To: Steve Kargl <sgk@troutmask.apl.washington.edu>
Subject: Re: Finding a rogue src/sys commit with bisection?
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On 11/15/14, 11:01 AM, Steve Kargl wrote:
> On Sat, Nov 15, 2014 at 10:56:50AM -0800, Alfred Perlstein wrote:
>> On 11/15/14, 10:43 AM, Steve Kargl wrote:
>>> Before I totally hose by /usr/src directory, does anyone
>>> have some guidelines on doing a binary search for a rogue
>>> commit in /usr/src/sys?.  Either cam or usb (or acpi?) has
>>> broken the ability to remove a external USB device once it
>>> is plugged into a usb port on my Dell Latitude D530 laptop.
>>> I know that a good kernel can be built with r271273 and
>>> a bad kernel comes from (nearly) top of tree at r274456.
>>>
>>> I assume I need to do somthing along the lines
>>>
>>> % cd /usr/src/sys
>>> % svn merge -r 274456:272864    (half way point between good and bad)
>>> (build kernel and test)
>>> % cd /usr/src/sys
>>> % svn revert -R .
>>> (assume 272864 builds working kernel)
>>> % svn merge -r 274456:273660   (1/2 point between 272864 and 274456).
>>>
>>> Rinse and repeat.
>>>
>> Use git, it has a built in bisector to shake this sort of thing out:
>>
> I won't be drawn into the git debate.
>
OK, so we don't want to use a tool purposefully built for the problem 
you are facing?  Doesn't seem like a "git debate" more like hammering in 
screws...

-Alfred