linux-kernel - Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 (Was: Re: Cannot format floppies under kernel 2.6.*?)

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Date:	Fri, 18 Dec 2009 05:55:02 -0500
From:	Mark Hounschell <dmarkh@....rr.com>
To:	Alain Knaff <alain@...ff.lu>
CC:	Mark Hounschell <markh@...pro.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, fdutils@...tils.linux.lu
Subject: Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 (Was:
 Re: Cannot format floppies under kernel 2.6.*?)

On 12/18/2009 03:59 AM, Mark Hounschell wrote:
> On 12/17/2009 06:24 PM, Alain Knaff wrote:
> 
>>
>> Now, I only need to find a machine locally to test this on. Or Mark: are
>> you confident in doing this yourself?
>>
> 
> I'll give it a shot. Sounds easy enough. If I have problems, I'll yell.
> 

Ok, I ran into a build issue on the third on.

#harley:/usr/src # git clone
git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-allstable.git
Initialized empty Git repository in /usr/src/linux-2.6-allstable/.git/
remote: Counting objects: 1486248, done.
remote: Compressing objects: 100% (248092/248092), done.
Receiving objects: 100% (1486248/1486248), 323.35 MiB | 6753 KiB/s, done.
remote: Total 1486248 (delta 1236282), reused 1476516 (delta 1227133)
Resolving deltas: 100% (1236282/1236282), done.
Checking out files: 100% (31502/31502), done.


harley:/usr/src # cd linux-2.6-allstable
harley:/usr/src/linux-2.6-allstable # git bisect start
harley:/usr/src/linux-2.6-allstable # git bisect bad v2.6.28
harley:/usr/src/linux-2.6-allstable # git bisect good v2.6.27.41
Bisecting: a merge base must be tested
[3fa8749e584b55f1180411ab1b51117190bac1e5] Linux 2.6.27

Build and test kernel: This one worked so:

harley:/usr/src/linux-2.6-allstable # git bisect good
Bisecting: 4879 revisions left to test after this (roughly 12 steps)
[c813b4e16ead3c3df98ac84419d4df2adf33fe01] Merge
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6

Build and test kernel: This one worked so:

harley:/usr/src/linux-2.6-allstable # git bisect good
Bisecting: 2443 revisions left to test after this (roughly 11 steps)
[db563fc2e80534f98c7f9121a6f7dfe41f177a79] Merge
git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

This one doesn't build:

CC [M]  fs/ext3/super.o
fs/ext3/super.c: In function ‘ext3_quota_on’:
fs/ext3/super.c:2839: error: ‘nd’ undeclared (first use in this function)
fs/ext3/super.c:2839: error: (Each undeclared identifier is reported only once
fs/ext3/super.c:2839: error: for each function it appears in.)
make[2]: *** [fs/ext3/super.o] Error 1
make[1]: *** [fs/ext3] Error 2
make: *** [fs] Error 2

I haven't yet determined that I can but, if I were to make a modification to the
tree now to fix this would that screw up the bisect process?

Regards
Mark

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