Mon Feb 13 EST 2012

Starting the BISECT procedure on kernel 3.0.20
 (The last official release I know that exhibits GOOD wraparound)

- At start of download:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-git \
 linux-git
Cloning into 'linux-git'...
remote: Counting objects: 2336386, done.
remote: Compressing objects: 100% (364838/364838), done.
Receiving objects:   0% (1370/2336386), 636.00 KiB | 88 KiB/s
-------------------------------------------------------------------------------
- End of download:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-git \
 linux-git
Cloning into 'linux-git'...
remote: Counting objects: 2336386, done.
remote: Compressing objects: 100% (364838/364838), done.
remote: Total 2336386 (delta 1954415), reused 2330678 (delta 1949034)
Receiving objects: 100% (2336386/2336386), 466.23 MiB | 69 KiB/s, done.
Resolving deltas: 100% (1954415/1954415), done.
-------------------------------------------------------------------------------
- Size of download:
du --max-depth=0 linux-git
1074408 linux-git

===============================================================================
The big BISECTION
~~~~~~~~~~~~~~~~~
git bisect start
git bisect bad v3.1
git bisect good v3.0
Bisecting: 4334 revisions left to test after this (roughly 12 steps)
[138051659902da7e6a09d379fee5dade2a80fcfd] Merge branch 'staging-next' of
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
-------------------------------------------------------------------------------
At this point, the content of BISECT_LOG is (for reference),

cat .git/BISECT_LOG
git bisect start
# bad: [c3b92c8787367a8bb53d57d9789b558f1295cc96] Linux 3.1
git bisect bad c3b92c8787367a8bb53d57d9789b558f1295cc96
# good: [02f8c6aee8df3cdc935e9bdd4f2d020306035dbe] Linux 3.0
git bisect good 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe
-------------------------------------------------------------------------------

>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
System exhibits GOOD wraparound
-------------------------------------------------------------------------------
git bisect good
Bisecting: 2163 revisions left to test after this (roughly 11 steps)
[ed8f37370d83e695c0a4fa5d5fc7a83ecb947526] Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
BAD
--------------------------------------------------------------------------------
git bisect bad
Bisecting: 1085 revisions left to test after this (roughly 10 steps)
[83c1b31794a9e3cb30edabef7e57fbdbe129c5ce] ramoops: fix compile failure on paris
>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
BAD
--------------------------------------------------------------------------------
git bisect bad
Bisecting: 511 revisions left to test after this (roughly 9 steps)
[69f1d1a6acbaa7d83ef3f4ee26209c58cd000204] Merge branch 'next/devel' of
ssh://master.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc
>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
BAD
--------------------------------------------------------------------------------
git bisect bad
Bisecting: 296 revisions left to test after this (roughly 8 steps)
[07e729ce894487e92405d3b221cffe587420a376] i2c-eg20t : Fix the issue of
Combined R/W transfer mode
>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
BAD
------------------------------------------------------------------------------
git bisect bad
Bisecting: 137 revisions left to test after this (roughly 7 steps)
[603f2e6d378948bf5e5ac04d98673761362a3b79] Merge branch 'drm-nouveau-next' of
git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-core-next
>>> Kernel version after compile -> 3.0.0-rc7+
reboot
uname -a
Linux AlexLFS 3.0.0-rc7+
System exhibits GOOD wraparound
------------------------------------------------------------------------------
git bisect good
Bisecting: 72 revisions left to test after this (roughly 6 steps)
[aebdd82e18c38258fe84ea080a43c098e826ef63] Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-ktest
>>> Kernel version after compile -> 3.0.0+
reboot
uname -a
Linux AlexLFS 3.0.0+
BAD
-------------------------------------------------------------------------------
git bisect bad
Bisecting: 37 revisions left to test after this (roughly 5 steps)
[bcff25fc8aa47a13faff8b4b992589813f7b450a] mm: properly reflect task dirty
limits
in dirty_exceeded logic
>>> Kernel version after compile -> 3.0.0-rc2+
reboot
uname -a
Linux AlexLFS 3.0.0-rc2+
System exhibits GOOD wraparound
-------------------------------------------------------------------------------
git bisect good
Bisecting: 18 revisions left to test after this (roughly 4 steps)
[250bae8be0177fcc1435cb46d1aba7e40a0366b2] ktest: Fix bug when ADD_CONFIG is
set but MIN_CONFIG is not
>>> Kernel version after compile -> 3.0.0-rc2+
reboot
uname -a
Linux AlexLFS 3.0.0-rc2+
System exhibits GOOD wraparound
-------------------------------------------------------------------------------
git bisect good
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[edc02bffbdcd92086f5cc9d715143e51acfa90ee] drm/radeon: Fix the definition of
RADEON_BUF_SWAP_32BIT
>>> Kernel version after compile -> 3.0.0-rc7+
reboot
uname -a
Linux AlexLFS 3.0.0-rc7+
BAD
-------------------------------------------------------------------------------
git bisect bad
Bisecting: 4 revisions left to test after this (roughly 2 steps)
[04fee895ef98ffbb91a941b53a92d6949bb6d1c4] DRM: clean up and document parsing
of video= parameter
>>> Kernel version after compile -> 3.0.0-rc7+
reboot
uname -a
Linux AlexLFS 3.0.0-rc7+
BAD
-------------------------------------------------------------------------------
git bisect bad
Bisecting: 1 revision left to test after this (roughly 1 step)
[0aff47f29337d1c23060eb1cea7801dfee0e0e4a] drm: really make debug levels match
in edid failure code
>>> Kernel version after compile -> 3.0.0-rc7+
reboot
uname -a
Linux AlexLFS 3.0.0-rc7+
System exhibits GOOD wraparound
-------------------------------------------------------------------------------
git bisect good
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[ee2762916f5594e60d8789593f149ed83b560cf7] DRM: Radeon: Fix section mismatch.
>>> Kernel version after compile -> 3.0.0-rc7+
reboot
uname -a
Linux AlexLFS 3.0.0-rc7+
System exhibits GOOD wraparound
-------------------------------------------------------------------------------
git bisect good
04fee895ef98ffbb91a941b53a92d6949bb6d1c4 is the first bad commit
commit 04fee895ef98ffbb91a941b53a92d6949bb6d1c4
Author: Rolf Eike Beer <eike-kernel@sf-tec.de>
Date:   Wed Jun 15 11:27:02 2011 +0200

    DRM: clean up and document parsing of video= parameter
    
    The video= parameter of the DRM drivers supports some additional flags that
    the normal fb drivers do not have. They also allow to limit these flags to
    specific outputs. Both things were previously undocumented.
    
    Also the parsing of the line had some oddities:
    -A lot of misplaced options were silently ignored or partly rejected instead
     of stopping the parsing immediately
    -The 'R' option is documented to follow the 'M' option if specified. It is not
     documented that 'M' is needed to specify 'R' (also this is the case for normal
     fb drivers). In fact the code is correct for normal fb drivers but wrong for
     DRM ones.
     The old code allowed 'R' only _before_ 'M' (since it parses backwards) and only
     if 'M' is given at all which is not needed for the DRM drivers.
    -the margins option ('m') was parsed but later ignored even if the later
     functions support it.
    -specifying multiple enable options at the same time did not lead to an error.
    -specifying something bogus for horizontal resolution (i.e. other things as
     digits) did not lead to an error but an invalid resolution was used.
    
    If any errors are encountered the position of the faulting string is now
    printed to the user and the complete mode is ignored. This gives much
    more consistent error behaviour.
    
    I also removed some useless assignments and changed the local flag variables
    to be bool.
    
    Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
    Signed-off-by: Dave Airlie <airlied@redhat.com>

:040000 040000 98d77a7d3c99497465df6f5c33bd1e302b961ddd 70ab4faf3d7dafc0abe2dcb1907083c50c3c5624 M	Documentation
:040000 040000 d2a5596a7d99b224c58d386c90fe98357b1df0c6 6ae1f7198a7b6e2ab95992ddfccb332244a18230 M	drivers