Date:	Wed, 28 Mar 2007 04:26:05 +0100
From:	Sid Boyce <g3vbv@...eyonder.co.uk>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Adrian Bunk <bunk@...sta.de>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org, auxsvr@...il.com
Subject: Re: 2.6.21-rc1 and 2.6.21-rc2 kwin dies silently

Eric W. Biederman wrote:
> Sid Boyce <g3vbv@...eyonder.co.uk> writes:
>
>   
>> This is what I've got so far on the first boot, I shall have to check the
>> manpage for git-bisect again to see if there is anything else to be added,
>> nothing enlightening seen so far - further reboots to be done.
>>     
>
> I'm a little confused at what I am seeing below.
> Normally what happens is that after a kernel compile and test.  You call
> "git-bisect bad" or "git-bisect good" and then git-bisect picks the next
> kernel to test.  Then you compile and test that one.  It looks like
> you called git-bisect bad several times in a row without testing....
>
>
> Eric
>
>   
This is the procedure I followed.
<--  snip  -->

# install git and cogito on your computer

# clone Linus' tree:
cg-clone  
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

# start bisecting:
cd linux-2.6
git bisect start
git bisect bad 86a71dbd3e81e8870d0f0e56b87875f57e58222b
git bisect good ac98695d6c1508b724f246f38ce57fb4e3cec356

# start round
cp /path/to/.config .
make oldconfig
make
# install kernel, check whether it's good or bad, then:
git bisect [bad|good]
========================================================
I built and installed the kernel downloaded using "cg-clone", booted it 
up  and ran "git bisect bad".  I'm also somewhat confused as the first 
failing kernel is 2.6.20-git11, the Makefile says the kernel got with 
cg-clone is actually 2.6.21-rc4 and it built as  2.6.20-g208367ee.
Regards
Sid.

>> barrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 22 revisions left to test after this
>> [3fc605a2aa38899c12180ca311f1eeb61a6d867e] knfsd: allow the server to provide a
>> gid list when using AUTH_UNIX authentication
>> rrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 11 revisions left to test after this
>> [ed8b4d4d7a31923db32f4684535944d69eb43677] qconf: hide empty list items
>> barrabas:/usr/src/GIT/linux-2.6 #
>> rrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 6 revisions left to test after this
>> [66e7c7230fed159e138fc1292ee662b8bbdb74d6] qconf: relocate Search Command
>> barrabas:/usr/src/GIT/linux-2.6 #
>>
>> barrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 3 revisions left to test after this
>> [895a39a084e5478121a74752a291165c4502378f] Make mkcompile_h use LANG=C and
>> LC_ALL=C for $CC -v
>>
>> barrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 2 revisions left to test after this
>> [8c7e4498adfdb4aea5a0d056590ec18d099ba062] search a little harder for mkimage
>>
>> barrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> Bisecting: 1 revisions left to test after this
>> [b7de8e7e3c7b79a72c20c7fd58bd65df3d146b13] ia64: fix noncoherent DMA API so
>> devres builds
>>
>> # git bisect bad
>> b7de8e7e3c7b79a72c20c7fd58bd65df3d146b13 is first bad commit
>> commit b7de8e7e3c7b79a72c20c7fd58bd65df3d146b13
>> Author: Roland Dreier <rdreier@...co.com>
>> Date:   Wed Feb 14 00:32:53 2007 -0800
>>
>>    [PATCH] ia64: fix noncoherent DMA API so devres builds
>>
>>    On ia64, drivers/base/dma-mapping.c doesn't build because it calls
>>    dma_alloc_noncoherent() and dma_free_noncoherent(), which appear to be
>>    terminally broken; the calls end up generating errors like
>>
>>        drivers/base/dma-mapping.c: In function 'dmam_noncoherent_release':
>>        drivers/base/dma-mapping.c:32: error: 'struct ia64_machine_vector' has no
>> member named 'platform_dma_free_coherent'
>>
>>    because the multiple levels of macro expansion in <asm/dma-mapping.h> and
>>    <asm/machvec.h> end up turning a call to dma_free_noncoherent() into
>>    ia64_mv.platform_dma_free_coherent (instead of the intended
>>    ia64_mv.dma_free_coherent).
>>
>>    This patch fixes this by converting dma_{alloc,free}_noncoherent() into
>>    inline functions that call the corresponding coherent functions, instead of
>>    trying to do this with macros.
>>
>>    Signed-off-by: Roland Dreier <rolandd@...co.com>
>>    Acked-by: Tony Luck <tony.luck@...el.com>
>>    Cc: Al Viro <viro@...iv.linux.org.uk>
>>    Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
>>    Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
>> :040000 040000 ac36019577dc1846a5655918cf9d6b2541c398cf
>> ba536f54303cc9495b7839763ed1121d3a22154c M      include
>>
>> barrabas:/usr/src/GIT/linux-2.6 # git bisect bad
>> 86a71dbd3e81e8870d0f0e56b87875f57e58222b
>> Bisecting: 44 revisions left to test after this
>> [208367eeec8d6f6fcee1a0672af2149aeee7b658] sysctl: cdrom: remove unnecessary
>> insert_at_head flag
>>
>> barrabas:/usr/src/GIT/linux-2.6 # git bisect good
>> ac98695d6c1508b724f246f38ce57fb4e3cec356
>> Bisecting: 44 revisions left to test after this
>> [208367eeec8d6f6fcee1a0672af2149aeee7b658] sysctl: cdrom: remove unnecessary
>> insert_at_head flag
>>
>> Regards
>> Sid.
>>
>> -- 
>> Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
>> Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Specialist,
>> Cricket Coach
>> Microsoft Windows Free Zone - Linux used for all Computing Tasks
>>     
>
>
>   


-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks


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