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Re: re[6]: Which Kernel for XFS

To: Greg Freemyer <freemyer@xxxxxxxxxxxxxxxxx>
Subject: Re: re[6]: Which Kernel for XFS
From: "Anthony W. Marino" <anthony@xxxxxxxxxxxxxx>
Date: Tue, 4 Jun 2002 17:08:04 -0400
Cc: linux-xfs <linux-xfs@xxxxxxxxxxx>
In-reply-to: <20020604204839.TJIP21266.imf08bis.bellsouth.net@taz>
Organization: AWM Objects
References: <20020604204839.TJIP21266.imf08bis.bellsouth.net@taz>
Sender: owner-linux-xfs@xxxxxxxxxxx
User-agent: KMail/1.4.1
Greg,
Using a browser and not YAST I can see the "changes" text file.  YAST shows 
that I have source installed however  I'm going to force installation of the 
kernel source per your recommendation.

Thank You,
Anthony

> Anthony,
>
> I am not an expert on Linux kernels, and I'm sure there are people on this
> list that will disagree with the below, but my thoughts are:
>
> It depends on what you are trying to do.
>
> If you are a kernel developer, or you want to be on the bleeding edge of
> kernel capabilities, then you need a kernel from kernel.org or one of the
> other kernel maintainers.
>
> For production I like to use distribution kernels.or patched distribution
> kernels.  i.e. From Redhat, SuSE, Mandrake, etc.
>
> My logic for this is that if the kernel turns out to have a bug, it is
> likely that distribution maintainer will correct the kernel and send out
> the fix.
>
> i.e. Redhat supported the 2.4.9 kernel for 8 months or so, and may still be
> releasing patches for it.
>
> If you are using a kernel.org kernel, and you get a rev. level behind,
> nobody is going to support you.
>
> i.e.  If you have 2.4.17 kernel today, and a kernel bug pops up that you
> care about, there is nobody that is going to creating patches against that
> "old" of a kernel.  As I understand it, the kernel developers never fix a
> released kernel.  If something is broke, they fix it in the next release. 
> Unfortunately, something else will likely be broken in the next release.
>
> If you want a "maintained" kernel, you have to get it from a distribution
> provider.
>
> Another issue, is that if you upgrade your kernel and you don't get all the
> associated pieces, you can break some applications.
>
> i.e. Some of the xfs user-land tools for kernels prior to 2.4.18 don't work
> with the 2.4.18 kernel.  I imagine that there are many of these kernel
> dependencies spread around a typical distribution, and you risk breaking
> things if you upgrade the kernel lock, stock, and barrel.
>
> Greg Freemyer
> Internet Engineer
> Deployment and Integration Specialist
> Compaq ASE - Tru64
> Compaq Master ASE - SAN Architect
> The Norcross Group
> www.NorcrossGroup.com
>
>  >>  Greg,
>  >>  Are there any advantages to me using the Mantel/SuSE kernel over the
>  >>  latest
>  >>  sources from sgi?
>  >>
>  >>  Thanks,
>  >>  Anthon
>  >>
>  >>  > Anthony,
>  >>  >
>  >>  > The notes at
>  >>
>  >> 
>  >> ftp://ftp-linux.cc.gatech.edu/pub/linux/distributions/suse/people/mante
>  >>l/ ne
>  >>
>  >>  >xt/kernel-source.changes give you some of what you are asking about.
>  >>  >
>  >>  > Per the above, it is based on the 2.4.19-pre8aa1 kernel.  I believe
>  >>  > that already has the XFS patches in it, so you could look into what
>  >>  > it has.
>  >>  >
>  >>  > For details, I guess you need to download the source RPM and read
>  >>  > the specfile.
>  >>  >
>  >>  > Greg
>  >>  >
>  >>  >  >>  > Since you are using a SuSE distribution, have you thought
>  >>  >  >>  > about using
>  >>  >  >>
>  >>  >  >>  the
>  >>  >  >>
>  >>  >  >>  > SuSE experimental kernel from
>  >>  >  >>  > ftp://ftp.suse.com/pub/people/mantel/next/RPM/
>  >>  >  >>  >
>  >>  >  >>  > It has all the standard SuSE patches and includes a
>  >>  >  >>  > relatively recent
>  >>  >  >>
>  >>  >  >>  XFS.
>  >>  >  >>
>  >>  >  >>  > Possibly XFS v1.1, but I'm not sure.
>  >>  >  >>
>  >>  >  >>  I have the Mantel's latest kernel installed on my laptop
>  >>  >  >> however
>  >>
>  >>  I'm
>  >>
>  >>  >  >> not certain what it is that I have.  What I mean by that is how
>  >>  >  >> do I find out what XFS version and patch level do I have so that
>  >>  >  >> I can decide on patch upgrades?  I know it says kernel 2.4.18
>  >>  >  >> however is
>  >>
>  >>  it
>  >>
>  >>  >  >> really 2.4.19 pre... .
>  >>  >  >>  As you can see, I'm not certain of the versions and patch
>  >>  >  >> levels contained
>  >>  >  >>
>  >>  >  >>  within the Mantel stuff.
>  >>  >  >>
>  >>  >  >>  Anthony
>  >>  >  >>
>  >>  >  >>  > FYI: The stock SuSE 8.0 kernel also has XFS support, but the
>  >>  >  >>  > ACL
>  >>  >  >>
>  >>  >  >>  handling
>  >>  >  >>
>  >>  >  >>  > is broken in such a way that xfsdump/xfsrestore don't handle
>  >>  >  >>  > ACLs correctly.
>  >>  >  >>  >
>  >>  >  >>  > Greg Freemyer
>  >>  >  >>  > Internet Engineer
>  >>  >  >>  > Deployment and Integration Specialist
>  >>  >  >>  > Compaq ASE - Tru64
>  >>  >  >>  > Compaq Master ASE - SAN Architect
>  >>  >  >>  > The Norcross Group
>  >>  >  >>  > www.NorcrossGroup.com
>  >>  >  >>  >
>  >>  >  >>  >  >>  Steve,
>  >>  >  >>  >  >>  What do you recommend that I use since the box I'm
>  >>  >  >>  >  >> building
>  >>
>  >>  is
>  >>
>  >>  >  >>  >  >> a development
>  >>  >  >>  >  >>  box for myself which I will be using for development
>  >>
>  >>  purposes
>  >>
>  >>  >  >>  >  >> and
>  >>  >  >>
>  >>  >  >>  thus
>  >>  >  >>
>  >>  >  >>  >  >>  will
>  >>  >  >>  >  >>  be using other cvs sources from other opesource projects
>  >>  >  >>  >  >> as well?
>  >>  >  >>  >  >>
>  >>  >  >>  >  >>  Anthony
>  >>  >  >>  >  >>
>  >>  >  >>  >  >>  > On Mon, 2002-06-03 at 13:26, Anthony W. Marino wrote:
>  >>  >  >>  >  >>  > > I'm building/setting-up a new server SuSE 7.3 which
>  >>  >  >>  >  >>  > > will
>  >>  >  >>
>  >>  >  >>  include
>  >>  >  >>
>  >>  >  >>  >  >>  > > 3ware (7810) ide raid (10 or 5) with brand new
>  >>  >  >>  >  >>  > > drives
>  >>
>  >>  and
>  >>
>  >>  >  >>  >  >>  > > most likely LVM
>  >>  >  >>  >  >>
>  >>  >  >>  >  >>  too.
>  >>  >  >>  >  >>
>  >>  >  >>  >  >>  > > Should I get the kernel from oss.sgi.com cvs
>  >>  >  >>  >  >>  > > (CVSROOT=":pserver:cvs@xxxxxxxxxxx:/cvs"
>  >>  >  >>  >  >>  > > linux-2.4-xfs)
>  >>
>  >>  or
>  >>
>  >>  >  >>  >  >>  > > is there another location/process that I should
>  >>
>  >>  entertain?
>  >>
>  >>  >  >>  >  >>  > > Also
>  >>  >  >>
>  >>  >  >>  what
>  >>  >  >>
>  >>  >  >>  >  >>  > > kernel release does the oss.sgi.com cvs sources give
>  >>  >  >>  >  >>  > > me?
>  >>  >  >>  >  >>  > >
>  >>  >  >>  >  >>  > > Thank You,
>  >>  >  >>  >  >>  > > Anthony
>  >>  >  >>  >  >>  >
>  >>  >  >>  >  >>  > Right now it gives you 2.4.19-pre9 with xfs and kdb
>  >>  >  >>  >  >>  > (which you probably do not care about). There are
>  >>  >  >>  >  >>  > fixes in this
>  >>
>  >>  tree
>  >>
>  >>  >  >>  >  >>  > which
>  >>  >  >>
>  >>  >  >>  are
>  >>  >  >>
>  >>  >  >>  >  >>  > not available anywhere else, it is the most direct
>  >>  >  >>  >  >>  > link to XFS development. Of course this also possibly
>  >>  >  >>  >  >>  > means there
>  >>
>  >>  are
>  >>
>  >>  >  >>  >  >>  > bugs in this tree which are not available anywhere
>  >>  >  >>  >  >>  > else.
>  >>  >  >>  >  >>  >
>  >>  >  >>  >  >>  > Steve
>  >>  >
>  >>  > Greg Freemyer
>  >>  > Internet Engineer
>  >>  > Deployment and Integration Specialist
>  >>  > Compaq ASE - Tru64
>  >>  > Compaq Master ASE - SAN Architect
>  >>  > The Norcross Group
>  >>  > www.NorcrossGroup.com



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