Kerlen 2.4.13 and ramdisks

Tue Feb 19 18:42:37 EST 2002

What about and md5sum on the two images .. flash and ftp ...?

  ----- Original Message -----
>From: "Chris Fowler" <cfowler at outpostsentinel.com>
>To: "Ian" <Relativity at HumanHeuristic.com>
>Subject:  RE: Kerlen 2.4.13 and ramdisks
>Date: Tue, 19 Feb 2002 18:36:21 -0500
>
> Yea.  I had to bump it up once.  The funny thing is that the package is the
> same size.  8mb on flash.  8mb via tftp.  It just seems that by using
> a ramfs temp storage area cause major memory problems during initrd
> execution.  I have my ramdisk size set to 16mb.  In case I need to grow in
> the
> future.
> 
> 
> -----Original Message-----
> From: Ian [mailto:Relativity at HumanHeuristic.com]
> Sent: Tuesday, February 19, 2002 6:34 PM
> To: Chris Fowler
> Cc: linux-mtd at lists.infradead.org
> Subject: RE: Kerlen 2.4.13 and ramdisks
> 
> 
> 
> The only thing I can think to suggest is that you verify the max size of the
> ramdisks
> in either your kernel config, or your kernel boot params.  This will also
> cause you
> problems if its not set correctly.
> 
> 
> 
>   ----- Original Message -----
> >From: "Chris Fowler" <cfowler at outpostsentinel.com>
> >To: "Ian" <Relativity at humanheuristic.com>
> >Subject:  RE: Kerlen 2.4.13 and ramdisks
> >Date: Tue, 19 Feb 2002 17:50:58 -0500
> >
> >
> > the image bein dd'ed is an ext2 file system image.  I eliminated most my
> > problems with
> > using 1 ram disk and no more.  2.2.X I used 3 ram disks.  In 2.4.X Im
> > linmited to 1.
> >
> > The mount comand was an example.  If I used loopback, I would need to
> mount
> > it rw.  That would cause
> > problems during power failure.  That is whay I take a software image, dd
> it
> > to memory and mount as the rootfs.
> > If you lost power than you would only loose contents of memory.  If you
> > failed to issue "save" for the config, you would loose
> > working config too.
> >
> > My unit requires no shutdown nor supports.  "restart" simply tells the
> > kernel to toggle the reset line
> > on the machine no processes is killed in the restart.  They just don't
> exist
> > anymore.  I want a rootfs that
> > is writable and not volatile.  If I loose it I do not care.  It is setting
> > on flash as an encrytped file.
> >
> >
> > ]-----Original Message-----
> > From: Ian [mailto:Relativity at HumanHeuristic.com]
> > Sent: Tuesday, February 19, 2002 5:41 PM
> > To: Chris Fowler
> > Cc: linux-mtd at lists.infradead.org
> > Subject: RE: Kerlen 2.4.13 and ramdisks
> >
> >
> > > loopback would not allow me to write to the image while running it.
> > Making
> > loopback allows you to make modifications without dd'ing it in and out of
> > ramdisks (I used to use both methods for my initrd creation).
> >
> > > the flash (upgrade) process more difficult.  The FS is ext2 and I do not
> > use
> > > mount.
> > I don't understand - you originally said;
> >                   "mount /dev/ram6  fails."
> >
> > . but that said, I was mistaken too .. I meant the "-t" option ...
> > Ie; mount -t ext2 /dev/ram6 /tmp/flash
> >
> >
> > > The only way the kernel can mount this is by me putting it in memory
> > first.
> > > The only way to do that is with initrd.  It owkrs when initrd only
> places
> > > that data there.  When I try to download the *same* data from the
> network
> > > and put there it craps out.  I have to download the data first before I
> > can
> > If this is the case, where you download it and try to treat it like an
> > initrd, then
> > I'd be quicker to blame that process, than the ramdisk driver in 2.4.x --
> > particularly
> > when you say that it works as a straight initrd process (which is only
> > running
> > in ram anyway, as you know).
> >
> > > place it in /dev/ram7.  TO do that I mount a ram fs at a upper limit of
> > > 32mb.  Download the file there then place it in /dev/ram7.  Just by
> using
> > > that memory as temporary storeage I'm haing problems.  I've read posts
> > that
> > > state that certain 2.4.X kernels have problems repecting the boundaries
> of
> > a
> > > ramdisk.  They tend to overwrite those areas when needing memory.
> > In all the work we did with ramdisks, I don't think we ever dd'd the img
> > directly
> > to the ramx device ... we always dd'd /dev/zero out to the size we wanted,
> > mke2fs'd it, then untar'd our package ... and we never had any problems
> with
> > that (in high 2.2.x's and low 2.4.x's too).
> >
> >
> > >
> > >
> > > lilo.conf:
> > > ....
> > >    root=/dev/ram7
> > >
> > > -----Original Message-----
> > > From: linux-mtd-admin at lists.infradead.org
> > > [mailto:linux-mtd-admin at lists.infradead.org]On Behalf Of Ian
> > > Sent: Tuesday, February 19, 2002 4:51 PM
> > > To: Chris Fowler
> > > Cc: linux-mtd at lists.infradead.org
> > > Subject: Re:Kerlen 2.4.13 and ramdisks
> > >
> > >
> > >
> > > If you have loopback support compiled in you can mount it directly
> through
> > > the loopback driver, without creating a ramdisk ...
> > >
> > > What was the error that mount gave?  You probably only need to specify
> > > the "-o" parameter ... mount doesn't usually detect fancy filesystems
> ...
> > >
> > >
> > >   ----- Original Message -----
> > > >From: "Chris Fowler" <cfowler at outpostsentinel.com>
> > > >To: <linux-mtd at lists.infradead.org>
> > > >Subject:  Kerlen 2.4.13 and ramdisks
> > > >Date: Tue, 19 Feb 2002 10:33:33 -0500
> > > >
> > > > You guys might have ran across a ramdisk problem.  I have a feeling
> that
> > > kernel 2.4.13 is
> > > not respecting my ramdisks.
> > > >
> > > >
> > > > dd if=/etc/user.img of=/dev/ram6
> > > >
> > > > mount /dev/ram6  fails.
> > > >
> > > >
> > > > Is this a problem?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ______________________________________________________
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> > > >
> > >
> > >
> > > ______________________________________________________
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> > >
> > >
> > >
> >
> >
> >
> >
> > ______________________________________________________
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> >
> 
> 
> 
> 