Kernel Traffic #230 by Zack Brown

                        Kernel Traffic #230 For 9 Sep                          
                                                                               
                                 By Zack Brown                                 
                                                                               
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Table Of Contents

  * Standard Format
  * Text Format
  * XML Source
  * Mailing List Stats For This Week
  * Threads Covered
   
    1. 15 Aug  - 23 Aug  (7       Hacking MiniPCI                              
                         posts)                                                
    2. 16 Aug  - 27 Aug  (5       Backporting Recent IDE Updates From 2.6 To   
                         posts)   2.4                                          
    3. 21 Aug  - 22 Aug  (6       CramFS Maintainership                        
                         posts)                                                
    4. 22 Aug  - 27 Aug  (7       Linux 2.2 Maintainership                     
                         posts)                                                
    5. 22 Aug  - 24 Aug  (6       BitMover Threatens To Yank BitKeeper Service 
                         posts)   (Again)                                      
    6. 23 Aug            (6       Status Of LVM And EVMS In 2.6                
                         posts)                                                
    7. 23 Aug  - 24 Aug  (8       Linux 2.4.22 Released; 2.4.23 Contemplated   
                         posts)                                                
    8. 26 Aug  - 27 Aug  (10      Possible Filesystem Corruption On Some       
                         posts)   Promise IDE Drives                           
    9. 27 Aug            (5       Linus May Maintain 2.6 Himself Until 2.7 Is  
                         posts)   Forked Off                                   
   
Mailing List Stats For This Week

We looked at 1593 posts in 8001K.

There were 456 different contributors. 224 posted more than once. 186 posted
last week too.

The top posters of the week were:

  * 71 posts in 216K by "David S. Miller"
  * 35 posts in 127K by Andrew Morton
  * 31 posts in 97K by Alan Cox
  * 26 posts in 108K by Stephan von Krawczynski
  * 25 posts in 84K by Jeff Garzik
  * Full Stats

 

1. Hacking MiniPCI
15 Aug  - 23 Aug  (7 posts) Subject: "Current status of Intel PRO/Wireless
2100"
People: Christian Axelsson, Anders Karlsson, Bas Mevissen, James W. Laferriere

Christian Axelsson asked, "Whats the current status of the Intel PRO/Wireless
2100 MiniPCI? Some rumours says that its based upon the prisma 2.5 chip but I
havent had any luck with those drivers. Intel stays passive it seems." Anders
Karlsson replied:

    It is not a Prism 2.5 chipset, it is an Intel chipset that currently is
    unsupported. I have not had a response from Intel in my last mail to them,
    but I guess there could be holiday time there.
   
    For the time being those mini-PCI cards is dead weight in the laptop I am
    afraid. I hope that either Intel suddenly sees sense (snowflake in hell
    analogy coming on) or some bright spark reverse engineers the card and
    writes an alpha driver that surpasses the functionality of the Intel beta
    drivers they keep under lock and key internally.
   
    I'll probably locate some Prism CardBus card in the meantime to use.
   
Bas Mevissen suggested for brave souls:

    My dead weight was called Dell TrueMobile 1300 (with BroadCom chipset).
    What I did is buying a NetGear WG311 PCI card (802.11b/g). It contains a
    mini-pci card in a slot unders a metal cover and some small stuff on the
    PCI-shape PCB.
   
    The cover is easy to remove (only 3 pins) and the antenna is not soldered,
    but connected with the same connector as in my notebook. I could only
    connect 1 (main) antenna, but the PCI card has only one antenna too. So you
    only loose antenna diversity.
   
    The NetGear contains an Atheros chipset. There is some open source stuff
    available (URL forgotten) and a driver (mafwifi) with a binary-only
    hardware abstraction. Not really what you want, but at least a start. A
    combination of both may lead to a more desirable result. But for me it is
    fine to use. Only I can not issue bug reports when the driver has been
    loaded since the last boot.
   
James W. Laferriere asked, "Do you (or anyone else) know which of the 'PCI'
based cards are use the 'mini-pci' cards on a bridge card ? I'd really like
more of a selection to choose from than just Netgear . The Netgear card you
spoke of below religously doesn't mention Linux in it's support sections . But
, (hopefully) it appears that you are using under linux , correct ?" Bas
replied, "I use it with Linux. Actually, I did not more than a few tests. But I
know it works and I verified it with the XP install that came with the
notebook. I just had to install the PCI-card drivers there." As for James'
bridge card question, Bas added, "Probably all PCI-cards that have a huge metal
casing. PCI WLAN cards are not so common (desktop and wireless is a bit silly
:-))and hence the development costs for a "real" PCI WLAN card might be too
high compared to the extra cost of using a Mini-PCI and a bridge. Actually,
"bridge" is too much honour for the remaining card. Slot converter is more
appropriate."

Bas also urged people to exercise caution when tinkering with their systems as
he had. He said, "Note that this kind of use of mini-pci modules is all on your
own risk and responsibility. Maybe I better had not told this on LKML. But now
that has happened, I advise people to think twice before doing it and ask me
for details in private if they feel uncertain about it."

 

2. Backporting Recent IDE Updates From 2.6 To 2.4
16 Aug  - 27 Aug  (5 posts) Subject: "[PATCH] Backport recent 2.6 IDE updates
to 2.4.x"
Topics: Disks: IDE
People: Erik Andersen, Alan Cox

Erik Andersen announced:

    Not too long ago I submitted an IDE patch fixing CONFIG_IDEDISK_STROKE.
    That in turn prompted a flurry of patches fixing a number of related IDE
    capacity problems.
   
    I have backported the lot (which includes my original fix) to 2.4.x. I
    believe these should be included into 2.4.x, but I leave the final call to
    you. I am running with all of these patches in my 2.4.x kernel and
    everything is working nicely.
   
After some private comments from folks on the list he posted a revised patch,
but Alan Cox had objections. He said:

    Its sufficient to stop bad things happening, its not sufficient to get the
    desired end user result of being able to read their disk if it moved
    controller. Bartlomiej pointed out that because of the other traps the
    problem doesn't occur right now except moving a disk.
   
    I'll post an additional diff tomorrow which adds hwif->dma_addressing (or
    dma_lba48 given the changes to naming people seem to prefer) so that can
    get fixed.
   
 

3. CramFS Maintainership
21 Aug  - 22 Aug  (6 posts) Subject: "[PATCH] remove cramfs maintainership"
Topics: FS: ramfs
People: Joern Engel, Daniel Quinlan, Pavel Machek

Joern Engel to remove Daniel Quinlan from the MAINTAINERS file as maintainer of
CramFS, when Daniel failed to respond to an email. Pavel Machek suggested at
least CCing Daniel on the patch to remove him, and Joern clarified, "His mail
as in MAINTAINERS bounces and Linus tried to contact him a while ago. No reply
that I am aware of." William Stearns gave an address for Daniel, but Joern
reiterated that Linus had been unable to reach him. Then Daniel said, "Well, I
don't see any Linus email me about this, but just the same, sorry about the
non-responses. In the short run, if you resend your patch, I'll get back to you
for real. In the long run, cramfs (and the sourceforge tools project) probably
could use a new maintainer and it really should be the same person."

 

4. Linux 2.2 Maintainership
22 Aug  - 27 Aug  (7 posts) Subject: "linux-2.2 future?"
People: Ruben Puettmann, Marc-Christian Petersen, Alan Cox

Ruben Puettmann asked, "What's up with linux-2.2 now? Who will do Alan's job in
the next year? Marc" [Marc-Christian Petersen] "is intrested doing this job. I
know Marc from linux-2.2.x-secure and from the wolk project, see http://
wolk.sourceforge.net. Why not Marc? He can surely differentiate between
mainstream and a private kernel fork tree." [...] "I can't see postings from
other people who want to take 2.2. I think 2.2 is not dead. I often see 2.2
kernels running on systems like wlan access points or dsl routers from
different vendors. 2.2 is often used where stability is a must-have. At least
security fixes have to go in." A. De Faccio replied that it did seem that 2.2
should continue to be maintained. Marc-Christian said he saw a lot of stuff
that could be done in 2.2, and indicated that he would be willing to take over
from Alan Cox as maintainer; but he added, "Anyway, no comment from Alan, so I
think he don't want to give 2.2 away to me." Alan replied, but avoided that
questions, saying, "The problem is that change breaks stuff. a lot of the 2.2
users will happily trade lack of LBA48 support for stability and
predictability. Thats why I took a basically "if its not a serious bugfix its
not going in" approach."

 

5. BitMover Threatens To Yank BitKeeper Service (Again)
22 Aug  - 24 Aug  (6 posts) Subject: "*sigh* something is wrong with bkcvs
again"
Topics: FS: XFS, Version Control
People: Aaron Lehmann, Larry McVoy, Ken Moffat, Ben Collins

Aaron Lehmann reported:

    At the *root* of a fresh checkout:
   
    $ head -2 Makefile
    #
    # Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
    
    It's the XFS makefile...
   
Larry McVoy's mind snapped, and he replied:

    This is your message recast in the context of the kernel, or at least this
    is what it sounded like to me:
   
        *Sigh*. The kernel oops *again*. How dare you give me this kernel for
        free and then break it. Fix it, right now, and I'd like an apology
        along with the fix. Hurry up.
   
    Maybe you didn't intend it to sound like that and you'd like to rephrase
    it.
   
Ken Moffat replied, "just because the subject contains the magic letters "bk"
does not mean it's neccesarily an attack on your product." Larry replied
angrily:

    Let's put this into context. I got up this morning to find Aaron's posting
    and I started looking into the problem. It turned into a mess and rather
    than spend Saturday with my wife and kids I sent them out of the house so I
    could focus on this and fix it. It took several hours to track down the bug
    and the tree has been rebuilding since about 1pm.
   
    I gave up half my weekend to fix this stuff. I made my family get out of
    the house for your benefit, my wife is pissed at me, my kids are pissed at
    me, and people here are rude to me for giving them something for free that
    they should have built themselves. Hey, wrong answer and I'm the idiot for
    putting up with it. So I pointed out to the list that I don't like it and I
    tried to make it clear by pointing out that you wouldn't put it with that
    sort of bug report from me about the kernel.
   
    Apparently I wasn't clear enough so here is try #2:
   
      + We don't owe you this service
      + You could have built this service
      + People are routinely rude about it when there are problems
      + Keep it up and the service goes away
   
    We didn't get a nice message saying "please look at bk2cvs, it seems
    broken", we got an annoyed message from some guy with an ax to grind.
    Here's a quote from him talking about Pavel's oh-so-great BitKeeper clone:
   
        "It would be better if you stored it in BitKeeper just to piss Larry
        off."
       
        http://marc.theaimsgroup.com/?l=linux-kernel&m=104653836702419&w=2
       
    The bk2cvs gateway is a free service, it costs us money to provide it.
    People seem to think we are obligated to provide it and support it, and
    they think it's OK to be rude. Here's a feedback loop for you: every time I
    get a rude mail about this service the gateway gets shut down. First time
    is 1 day and it doubles every time after that. That means that you all as a
    community need to pass the word that it's not healthy to be rude. I'm sick
    of it, I've had it with that, I have absolutely zero tolerance for it and
    no sense of humor about it.
   
    Some people have gotten the message, Ben Collins is a great example. He's
    been polite and pleasant to deal with and as a result we host the BK2SVN
    gateway next to the BK2CVS gateway. If you're nice I'll bend over backwards
    to help you but I've had it with rude people. It doesn't take any
    substantial effort to be polite and you as a community need to require that
    politeness or give up the gateway. It's that simple.
   
Elsewhere, Aaron said to Larry, "The disrespect wasn't directed towards you,
but at the problem. BKcvs is a great resource, but it's got some recurring
bugs, and they're quite frustrating. While I realize you're the author,
everyone makes mistakes. Your work on the CVS gateway is appreciated, even
though it isn't flawless yet."

 

6. Status Of LVM And EVMS In 2.6
23 Aug  (6 posts) Subject: "evms or lvm?"
Topics: Disk Arrays: EVMS, Disk Arrays: LVM, Disk Arrays: RAID, Ioctls
People: Jose Luis Domingo Lopez, Wakko Warner, Wichert Akkerman

Voicu Liviu was planning to migrate to a 2.6 kernel, and wanted to know whether
LVM or EVMS was the best way to handle multiple disk volumes. Jose Luis Domingo
Lopez replied:

    2.6.0 will have many changes with respect to LVM and EVMS. LVM is updated
    to newer version 2 (LVM2), based on DM (Device Mapper), sort of a
    simplified in-kernel LVM that just handles discovering the drives. Updated
    userspace utilities (LVM2) are already available to drive this.
   
    On the other part, EVMS was completely redesigned. Former EVMS
    implementation was duplicating too much code, and in general it was
    regarded as a bad implementation on a very good idea, so the people at IBM
    in charge on EVMS development took what it look to everyone as a very
    clever move, and for 2.6.x they implemented EVMS on top of DM. User space
    utilities for EVMS are (from the user's point of view) the same as before,
    but now the inner details are different: no reimplementation of software
    RAID, no reimplementation of LVM, etc.
   
    Have a look at both projects websites to get more accurate and detailled
    information about them:
    http://evms.sourceforge.net/
    http://www.sistina.com/products_lvm.htm
   
Wakko Warner remarked, "I noticed the kernel doesn't have LVM as an option now.
Does both projects just use the DM from userspace?" Wichert Akkerman confirmed
that yes, they did. Voicu Liviu asked for some more explanation, and Jose
replied:

    In 2.6.x there is just support for Device Mapper. From "Multi-device
    support (RAID and LVM)" you can see:
   
      x x        <M>   Device mapper support
      x x        [*]     ioctl interface version 4
    
    Both LVM2 and EVMS (from version 2.0.0) use Device Mapper. For LVM2 you
    just need to get updated userspace tools from your vendor or directly from
    www.sistina.com. For EVMS to work, see: http://evms.sourceforge.net/
    install-2.0.html
   
 

7. Linux 2.4.22 Released; 2.4.23 Contemplated
23 Aug  - 24 Aug  (8 posts) Subject: "Linux 2.4.22-rc3"
Topics: FS: XFS, Networking, Power Management: ACPI, Sound: ALSA, USB, Virtual
Memory
People: Marcelo Tosatti, Willy Tarreau, David van Hoose, Matthias Andree, 
Christoph Hellwig, Alan Cox, Andrea Arcangeli, Nick Piggin

Marcelo Tosatti announced 2.4.22-rc3 and said that would hopefully be the last
-rc release before 2.4.22 proper. He added, "The ACPI changes should fix most
of well known ACPI issues." Willy Tarreau gave it a whirl and said, "it's OK
for me, both on my Dual Athlon and my VAIO (ACPI still OK BTW). I also
encountered the unresolved dependency that Eyal reported for tc35815, but
that's harmless." And David van Hoose also confirmed, "ACPI is still working
perfectly for me on my Asus P4S8X. No USB or ethernet problems like with 2.6.
No odd ACPI warnings or non-fatal errors either. Whatever these fixes are, they
should also go in 2.6 ASAP. :-)"

Elsewhere, under the Subject: "Linux 2.4.22-rc4", Marcelo put out 2.4.22-rc4
after all, to fix x86-64 ia32 emulation and a few other problems that had
cropped up. Then finally under the Subject: "linux-2.4.22 released", he
released 2.4.22 with no changes from -rc4. Matthias Andree asked, "What are the
plans for 2.4.23? XFS merge perhaps <hint>?" Christoph Hellwig said he was
preparing some XFS patches for that purpose, "but if the merge-rate doesn't
increase it's more like 2.4.24 or 2.4.25.." A lot of other folks wanted to see
ALSO in 2.4, but a number of folks argued that there was no need for this,
since 2.6 had ALSA, and folks could use that if they needed it. It was also
pointed out that ALSA would be easy to install in 2.4 separately, without
requiring integration in the official sources.

Elsewhere, Nick Piggin suggested that some of Andrea Arcangeli's Virtual Memory
work should go into 2.4, and Marcelo replied, "Definately. Thats the first
thing I'm going to do after looking through "2.4.23-pre-patches" folder."

Elsewhere Alan Cox suggested that as little as possible should go into 2.4, 
"especialyl stuff that affects driver interfaces. 2.6-test is the place to
direct your latest and greatest works IMHO."

 

8. Possible Filesystem Corruption On Some Promise IDE Drives
26 Aug  - 27 Aug  (10 posts) Subject: "Promise IDE patches"
Topics: Disks: IDE
People: Jan Niehusmann, Alan Cox, Marcelo Tosatti, Bartlomiej Zolnierkiewicz, 
Erik Andersen

Jan Niehusmann said:

    Two weeks ago, I tried two patches against 2.4.21 regarding LBA48 support.
    One limits the size of a drive to 137GB if LBA48 is not available. Without
    this patch, severe data corruption is possible.
   
    http://gondor.com/linux/patch-limit48-2.4.21
   
    The other one is making LBA48 support work with pdc 20265 controllers.
   
    http://gondor.com/linux/patch-pdc-lba48-2.4.22
   
    I think they should be candidates for inclusion in 2.4.23, as well as a fix
    for hdparm -I (and other commands going directly to the drive) on (some?)
    promise controllers:
   
    http://marc.theaimsgroup.com/?l=linux-kernel&m=104250818527780&w=2
   
Bartlomiej Zolnierkiewicz asked Marcelo Tosatti to apply those patches, and
Erik Andersen also said that his recent patches (http://marc.theaimsgroup.com/?
l=linux-kernel&m=106159060721871&w=2) also fixed the same problem. And close
by, Alan Cox said that both patches looked wrong to him. Bartlomiej didn't
think this was the case, and the thread ended inconclusively.

 

9. Linus May Maintain 2.6 Himself Until 2.7 Is Forked Off
27 Aug  (5 posts) Subject: "BK tree?"
Topics: Version Control
People: Larry McVoy, Andrew Morton, Ricky Beam, Linus Torvalds

Ricky Beam noticed that the public BitKeeper repository had not been updated
for several days, and asked if there were a problem with the BitMover servers.
Leff Garzik explained that Linus Torvalds was just on vacation, and that was
why no patches had been committed. Larry McVoy also asked Andrew Morton (who
will apparently maintain 2.6 when Linus lets it go), "Hmm. Andrew, what's the
workflow? Is Linus still the guy who pushes to bkbits or is that now your or
him? If you need to be able to do it I'll set that up." Andrew confirmed that
Linus still handled all 2.6 pushes, and added, "There's no pressing need at
this time thanks. It could be that we keep going this way until 2.7 is forked
off."

 

 

 

 

 

 

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