MTD - DOC 2000 freezes on umount

MTD - DOC 2000 freezes on umount

[Mark Richards]

I've been through several good learning experiences getting my development
system set up to work with a DOC 2000 for an embedded project.  I've finally
settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked well
with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2, but
for reasons I can't yet fathom, the MTD drivers seem a bit unstable in this
particular kernel.

Most frequently when I perform a umount /mnt/doc (doc being the mount point)
the shell session freezes (the umount command does not return a prompt).

If I then perform a sfdisk -l /dev/nftla the command again goes off into
space with no return data.

Then the shut down hangs up.

I tried in one kernel build to apply the latest sources to my source tree
using the instructions (and the shell script) but this caused a compile
failure.  

May I have some suggestions as to how I can further diagnose this problem,
or what I can do to provide information that will help?

Many thanks,

Mark

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

Update... I have also discovered that sometimes the first umount works, but
a subsequent umount (preceded of course by a mount) also freezes.  In
addition, I also get an occasional freeze-up when issuing the mount command.

If I don't umount at the commandline, but instead call a reboot, the file
system umounts fine - question: since I have mounted the MTD manually, is it
considered part of the file system to be umounted when the machine shuts
down?

This is more a nuisance, as are the occasional freeze-ups I experience just
accessing the DOC once mounted, but since it's a departure from the previous
good performance, perhaps it's worth looking into?

Mark Richards


> -----Original Message-----
> From: linux-mtd-bounces@lists.infradead.org [mailto:linux-mtd-
> bounces@lists.infradead.org] On Behalf Of Mark Richards
> Sent: Monday, January 19, 2004 21:23
> To: linux-mtd@lists.infradead.org
> Subject: MTD - DOC 2000 freezes on umount
> 
> I've been through several good learning experiences getting my development
> system set up to work with a DOC 2000 for an embedded project.  I've
> finally
> settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked
> well
> with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2, but
> for reasons I can't yet fathom, the MTD drivers seem a bit unstable in
> this
> particular kernel.
> 
> Most frequently when I perform a umount /mnt/doc (doc being the mount
> point)
> the shell session freezes (the umount command does not return a prompt).
> 
> If I then perform a sfdisk -l /dev/nftla the command again goes off into
> space with no return data.
> 
> Then the shut down hangs up.
> 
> I tried in one kernel build to apply the latest sources to my source tree
> using the instructions (and the shell script) but this caused a compile
> failure.
> 
> May I have some suggestions as to how I can further diagnose this problem,
> or what I can do to provide information that will help?
> 
> Many thanks,
> 
> Mark
> 
> 
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/

Re: MTD - DOC 2000 freezes on umount

[David Woodhouse]

On Mon, 2004-01-19 at 21:23 -0500, Mark Richards wrote:
> I've been through several good learning experiences getting my development
> system set up to work with a DOC 2000 for an embedded project.  I've finally
> settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked well
> with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2, but
> for reasons I can't yet fathom, the MTD drivers seem a bit unstable in this
> particular kernel.
> 
> Most frequently when I perform a umount /mnt/doc (doc being the mount point)
> the shell session freezes (the umount command does not return a prompt).

Hit SysRq-P and/or SysRq-T to see precisely where it's locked up.


> I tried in one kernel build to apply the latest sources to my source tree
> using the instructions (and the shell script) but this caused a compile
> failure.  

Insufficient information to diagnose.

-- 
dwmw2

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

David,

Thanks much for the reply and especially for all your hard work on these
drivers.  I was pleased to find them as my beginning work with DOC was
difficult using what the vendor has provided.

> Hit SysRq-P and/or SysRq-T to see precisely where it's locked up.

Invoking sysrq is ineffective.  Seems sysrq was not configured.  I searched
my last .config used for the kernel build and there's no instance of SYSRQ
there.

I'll build again and then be able to tell you more as my problem is
reproducible.

I also see this in bootup:


Possible DiskOnChip with unknown ChipID 00 found at 0xc8000
Possible DiskOnChip with unknown ChipID B2 found at 0xca000
Possible DiskOnChip with unknown ChipID 83 found at 0xcc000
Possible DiskOnChip with unknown ChipID FF found at 0xce000
Possible DiskOnChip with unknown ChipID 85 found at 0xd0000
Possible DiskOnChip with unknown ChipID BD found at 0xd2000
DiskOnChip Millennium found at address 0xD4000
Flash chip found: Manufacturer ID: 98, Chip ID: E6 (Toshiba:NAND 8MB 3,3V)
1 flash chips found. Total DiskOnChip size: 8 MiB
mtd: Giving out device 0 to DiskOnChip Millennium
Possible DiskOnChip with unknown ChipID BD found at 0xd6000
Possible DiskOnChip with unknown ChipID FF found at 0xd8000
Possible DiskOnChip with unknown ChipID FF found at 0xda000
Possible DiskOnChip with unknown ChipID FF found at 0xdc000
Possible DiskOnChip with unknown ChipID FF found at 0xde000
Possible DiskOnChip with unknown ChipID FF found at 0xe0000
Possible DiskOnChip with unknown ChipID FF found at 0xe2000
Possible DiskOnChip with unknown ChipID FF found at 0xe4000
Possible DiskOnChip with unknown ChipID FF found at 0xe6000
Possible DiskOnChip with unknown ChipID FF found at 0xe8000
Possible DiskOnChip with unknown ChipID FF found at 0xea000
Possible DiskOnChip with unknown ChipID FF found at 0xec000
Possible DiskOnChip with unknown ChipID FF found at 0xee000
$Id: ftl.c,v 1.45 2003/01/24 23:31:27 dwmw2 Exp $
ftl_cs: FTL header not found.
NFTL driver: nftlcore.c $Revision: 1.87 $, nftlmount.c $Revision: 1.31 $
 nftla: nftla1
usb.c: registered new driver hub

I don't believe I've seen " ftl_cs: FTL header not found." in my previous
builds.

Sorry, I don't know enough about the file systems to know if this is normal.
Does it look ok to you?

Regarding the compile error, when I build for the sysrq I'll also apply the
latest MTD source to the new source tree for 2.4.24 and let you know
specifically what I find.


Mark Richards


> -----Original Message-----
> From: David Woodhouse [mailto:dwmw2@infradead.org]
> Sent: Tuesday, January 20, 2004 09:07
> To: Mark Richards
> Cc: linux-mtd@lists.infradead.org
> Subject: Re: MTD - DOC 2000 freezes on umount
> 
> On Mon, 2004-01-19 at 21:23 -0500, Mark Richards wrote:
> > I've been through several good learning experiences getting my
> development
> > system set up to work with a DOC 2000 for an embedded project.  I've
> finally
> > settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked
> well
> > with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2,
> but
> > for reasons I can't yet fathom, the MTD drivers seem a bit unstable in
> this
> > particular kernel.
> >
> > Most frequently when I perform a umount /mnt/doc (doc being the mount
> point)
> > the shell session freezes (the umount command does not return a prompt).
> 
> Hit SysRq-P and/or SysRq-T to see precisely where it's locked up.> 
> 
> > I tried in one kernel build to apply the latest sources to my source
> tree
> > using the instructions (and the shell script) but this caused a compile
> > failure.
> 
> Insufficient information to diagnose.
> 
> --
> dwmw2

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

David,

This may now be better referenced under a different subject line perhaps,
but here goes...

I set up a fresh source tree in order that I might enable SYSRQ and build
with the very latest MTD drivers.

1. Got latest via CVS
2. In the mtd/patches/ directory, ran:
  sh patchin.sh /usr/src/linux 
3. Then put in my current .config file into /usr/src/linux (link to my new
source tree) and ran make xconfig.

The following happened:
[root@localhost linux]# make xconfig
rm -f include/asm
( cd include ; ln -sf asm-i386 asm)
make -C scripts kconfig.tk
make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
cat header.tk >> ./kconfig.tk
./tkparse < ../arch/i386/config.in >> kconfig.tk
drivers/mtd/chips/Config.in: 14: unknown command
make[1]: *** [kconfig.tk] Error 1
make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
make: *** [xconfig] Error 2

It appeared that something was mangled by running patchin.  So I created a
new tree and first ran make xconfig, which worked fine, then applied patchin
and then ran make xconfig again.  

Here's the sequence:


[root@localhost linux]# make xconfig
rm -f include/asm
( cd include ; ln -sf asm-i386 asm)
make -C scripts kconfig.tk
make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkparse.o
tkparse.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkcond.o
tkcond.c
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkgen.o tkgen.c
gcc -o tkparse tkparse.o tkcond.o tkgen.o
cat header.tk >> ./kconfig.tk
./tkparse < ../arch/i386/config.in >> kconfig.tk
echo "set defaults \"arch/i386/defconfig\"" >> kconfig.tk
echo "set ARCH \"i386\"" >> kconfig.tk
cat tail.tk >> kconfig.tk
chmod 755 kconfig.tk
make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
wish -f scripts/kconfig.tk
[root@localhost linux]# cd ../mtd
[root@localhost mtd]# ls
boot     drivers  grub     INSTALL  Makefile            patches
COPYING  ffs2     html     kernel   mtd-jffs-HOWTO.txt  README
CVS      fs       include  lib      obsolete            util
[root@localhost mtd]# cd patches
[root@localhost patches]# sh patchin.sh /usr/src/linux
Patching /usr/src/linux
Include Filesytems: no
Zlib-Patch needed: no
Method: Link
Can we start now ? [y/N]y

Patching MTD
drivers/mtd
drivers/mtd/chips
drivers/mtd/devices
drivers/mtd/maps
drivers/mtd/nand
include/linux/mtd
Patching done
Please update Documentation/Configure.help from
/usr/src/mtd/Documentation/Configure.help
[root@localhost patches]# cd ../linux
bash: cd: ../linux: No such file or directory
[root@localhost patches]# cd ../..
[root@localhost src]# cd linux
[root@localhost linux]# make xconfig
rm -f include/asm
( cd include ; ln -sf asm-i386 asm)
make -C scripts kconfig.tk
make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
cat header.tk >> ./kconfig.tk
./tkparse < ../arch/i386/config.in >> kconfig.tk
drivers/mtd/chips/Config.in: 14: unknown command
make[1]: *** [kconfig.tk] Error 1
make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
make: *** [xconfig] Error 2 [root@localhost linux]#


Is it something I'm missing?  My kernel sources are the 2.4.24 (latest).


Mark Richards


> -----Original Message-----
> From: David Woodhouse [mailto:dwmw2@infradead.org]
> Sent: Tuesday, January 20, 2004 09:07
> To: Mark Richards
> Cc: linux-mtd@lists.infradead.org
> Subject: Re: MTD - DOC 2000 freezes on umount
> 
> On Mon, 2004-01-19 at 21:23 -0500, Mark Richards wrote:
> > I've been through several good learning experiences getting my
> development
> > system set up to work with a DOC 2000 for an embedded project.  I've
> finally
> > settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked
> well
> > with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2,
> but
> > for reasons I can't yet fathom, the MTD drivers seem a bit unstable in
> this
> > particular kernel.
> >
> > Most frequently when I perform a umount /mnt/doc (doc being the mount
> point)
> > the shell session freezes (the umount command does not return a prompt).
> 
> Hit SysRq-P and/or SysRq-T to see precisely where it's locked up.
> 
> 
> > I tried in one kernel build to apply the latest sources to my source
> tree
> > using the instructions (and the shell script) but this caused a compile
> > failure.
> 
> Insufficient information to diagnose.
> 
> --
> dwmw2

RE: MTD - DOC 2000 freezes on umount

[David Woodhouse]

On Tue, 2004-01-20 at 13:04 -0500, Mark Richards wrote:
> drivers/mtd/chips/Config.in: 14: unknown command

Try 'make oldconfig' instead.

-- 
dwmw2

RE: MTD - DOC 2000 freezes on umount

[Matthew S. McClintock]

I got the same problem. I just edited out the offending lines since they
did not effect me. I was unable to determine the problem by looking at
the contents of the file.

Matthew

On Tue, 2004-01-20 at 12:04, Mark Richards wrote:
> David,
> 
> This may now be better referenced under a different subject line perhaps,
> but here goes...
> 
> I set up a fresh source tree in order that I might enable SYSRQ and build
> with the very latest MTD drivers.
> 
> 1. Got latest via CVS
> 2. In the mtd/patches/ directory, ran:
>   sh patchin.sh /usr/src/linux 
> 3. Then put in my current .config file into /usr/src/linux (link to my new
> source tree) and ran make xconfig.
> 
> The following happened:
> [root@localhost linux]# make xconfig
> rm -f include/asm
> ( cd include ; ln -sf asm-i386 asm)
> make -C scripts kconfig.tk
> make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> cat header.tk >> ./kconfig.tk
> ./tkparse < ../arch/i386/config.in >> kconfig.tk
> drivers/mtd/chips/Config.in: 14: unknown command
> make[1]: *** [kconfig.tk] Error 1
> make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> make: *** [xconfig] Error 2
> 
> It appeared that something was mangled by running patchin.  So I created a
> new tree and first ran make xconfig, which worked fine, then applied patchin
> and then ran make xconfig again.  
> 
> Here's the sequence:
> 
> 
> [root@localhost linux]# make xconfig
> rm -f include/asm
> ( cd include ; ln -sf asm-i386 asm)
> make -C scripts kconfig.tk
> make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkparse.o
> tkparse.c
> gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkcond.o
> tkcond.c
> gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -c -o tkgen.o tkgen.c
> gcc -o tkparse tkparse.o tkcond.o tkgen.o
> cat header.tk >> ./kconfig.tk
> ./tkparse < ../arch/i386/config.in >> kconfig.tk
> echo "set defaults \"arch/i386/defconfig\"" >> kconfig.tk
> echo "set ARCH \"i386\"" >> kconfig.tk
> cat tail.tk >> kconfig.tk
> chmod 755 kconfig.tk
> make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> wish -f scripts/kconfig.tk
> [root@localhost linux]# cd ../mtd
> [root@localhost mtd]# ls
> boot     drivers  grub     INSTALL  Makefile            patches
> COPYING  ffs2     html     kernel   mtd-jffs-HOWTO.txt  README
> CVS      fs       include  lib      obsolete            util
> [root@localhost mtd]# cd patches
> [root@localhost patches]# sh patchin.sh /usr/src/linux
> Patching /usr/src/linux
> Include Filesytems: no
> Zlib-Patch needed: no
> Method: Link
> Can we start now ? [y/N]y
> 
> Patching MTD
> drivers/mtd
> drivers/mtd/chips
> drivers/mtd/devices
> drivers/mtd/maps
> drivers/mtd/nand
> include/linux/mtd
> Patching done
> Please update Documentation/Configure.help from
> /usr/src/mtd/Documentation/Configure.help
> [root@localhost patches]# cd ../linux
> bash: cd: ../linux: No such file or directory
> [root@localhost patches]# cd ../..
> [root@localhost src]# cd linux
> [root@localhost linux]# make xconfig
> rm -f include/asm
> ( cd include ; ln -sf asm-i386 asm)
> make -C scripts kconfig.tk
> make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> cat header.tk >> ./kconfig.tk
> ./tkparse < ../arch/i386/config.in >> kconfig.tk
> drivers/mtd/chips/Config.in: 14: unknown command
> make[1]: *** [kconfig.tk] Error 1
> make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
> make: *** [xconfig] Error 2 [root@localhost linux]#
> 
> 
> Is it something I'm missing?  My kernel sources are the 2.4.24 (latest).
> 
> 
> Mark Richards
> 
> 
> > -----Original Message-----
> > From: David Woodhouse [mailto:dwmw2@infradead.org]
> > Sent: Tuesday, January 20, 2004 09:07
> > To: Mark Richards
> > Cc: linux-mtd@lists.infradead.org
> > Subject: Re: MTD - DOC 2000 freezes on umount
> > 
> > On Mon, 2004-01-19 at 21:23 -0500, Mark Richards wrote:
> > > I've been through several good learning experiences getting my
> > development
> > > system set up to work with a DOC 2000 for an embedded project.  I've
> > finally
> > > settled on a RedHat 7.2 distribution and the 2.4.24 kernel.  All worked
> > well
> > > with the MTD drivers in several other setups: RedHat 9, Mandrake 9.2,
> > but
> > > for reasons I can't yet fathom, the MTD drivers seem a bit unstable in
> > this
> > > particular kernel.
> > >
> > > Most frequently when I perform a umount /mnt/doc (doc being the mount
> > point)
> > > the shell session freezes (the umount command does not return a prompt).
> > 
> > Hit SysRq-P and/or SysRq-T to see precisely where it's locked up.
> > 
> > 
> > > I tried in one kernel build to apply the latest sources to my source
> > tree
> > > using the instructions (and the shell script) but this caused a compile
> > > failure.
> > 
> > Insufficient information to diagnose.
> > 
> > --
> > dwmw2
> 
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
-- 
Matthew S. McClintock <mattsm@arlut.utexas.edu>

RE: MTD - DOC 2000 freezes on umount

[David Woodhouse]

On Tue, 2004-01-20 at 12:20 -0600, Matthew S. McClintock wrote:
> I got the same problem. I just edited out the offending lines since they
> did not effect me.

I sincerely hope you were effected by your parents and not by any form
of software :)

>  I was unable to determine the problem by looking at
> the contents of the file.

Bizarre. It's a define_bool, which is relatively new -- but not so new
it's not in 2.4.24, I thought. As you're only interested in the
DiskOnChip drivers, you're right that it doesn't affect you (assuming
that's what you meant:)

-- 
dwmw2

RE: MTD - DOC 2000 freezes on umount

[Matthew S. McClintock]

On Tue, 2004-01-20 at 12:22, David Woodhouse wrote:

> Bizarre. It's a define_bool, which is relatively new -- but not so new
> it's not in 2.4.24, I thought. As you're only interested in the
> DiskOnChip drivers, you're right that it doesn't affect you (assuming
> that's what you meant:)

I'm using the linuxppc_2_4_devel tree if that helps any.

-- 
Matthew S. McClintock <mattsm@arlut.utexas.edu>

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

Thank you that worked.  

I'll let you know what I find as to the freeze problem once the new kernel
is in place.

Would you like some text for updating the HOWTO document?


Mark Richards


> -----Original Message-----
> From: David Woodhouse [mailto:dwmw2@infradead.org]
> Sent: Tuesday, January 20, 2004 13:11
> To: Mark Richards
> Cc: linux-mtd@lists.infradead.org
> Subject: RE: MTD - DOC 2000 freezes on umount
> 
> On Tue, 2004-01-20 at 13:04 -0500, Mark Richards wrote:
> > drivers/mtd/chips/Config.in: 14: unknown command
> 
> Try 'make oldconfig' instead.
> 
> --
> dwmw2

Re: MTD - DOC 2000 freezes on umount

[Bob Beers]

On Tue, 2004-01-20 at 13:04 -0500, Mark Richards wrote:

 >[root@localhost linux]# make xconfig
 >rm -f include/asm
 >( cd include ; ln -sf asm-i386 asm)
 >make -C scripts kconfig.tk
 >make[1]: Entering directory `/usr/src/linux-2.4.24.new.mtd/scripts'
 >cat header.tk >> ./kconfig.tk
 >./tkparse < ../arch/i386/config.in >> kconfig.tk
 >drivers/mtd/chips/Config.in: 14: unknown command
 >make[1]: *** [kconfig.tk] Error 1
 >make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/scripts'
 >make: *** [xconfig] Error 2 [root@localhost linux]#
 >
 >
 >Is it something I'm missing?  My kernel sources are the 2.4.24 (latest).

I saw the exact same issue.  I edited drivers/mtd/chips/Config.in by hand,
  after mtd patchin, to change the lines (14 and 59) to modify
  the 'elif' into a nested 'else if'.  After that make xconfig works.  Also as
  mentioned by dwmw2, the other make *config don't seem to have any trouble
  with those lines.  I didn't get around to it figuring out why.

-bbeers

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

David, I ran the kernel build process and, sadly, no joy.

Here's the ending of a long string of various warnings from the compiler as
it worked through the MTD code...

gcc -D__KERNEL__ -I/usr/src/linux-2.4.24.new.mtd/include -Wall
-Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common
-fomit-frame-pointer -pipe -mpreferred-stack-boundary=2 -march=i686 -DMODULE
-DMODVERSIONS -include
/usr/src/linux-2.4.24.new.mtd/include/linux/modversions.h  -nostdinc
-iwithprefix include -DKBUILD_BASENAME=write
-c -o write.o write.c
write.c: In function `jffs2_new_inode':
write.c:91: `current' undeclared (first use in this function)
write.c:91: (Each undeclared identifier is reported only once
write.c:91: for each function it appears in.)
write.c:103: `CURRENT_TIME' undeclared (first use in this function)
make[2]: *** [write.o] Error 1
make[2]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/fs/jffs2'
make[1]: *** [_modsubdir_jffs2] Error 2
make[1]: Leaving directory `/usr/src/linux-2.4.24.new.mtd/fs'
make: *** [_mod_fs] Error 2
[root@localhost linux]#

The compile was performed on a new source tree (2.4.24) that had been
patched according to instructions and the configuration process operated as
recommended.

GCC: 2.96 20000731 (Red Hat 7.1 2.96-98) Specs from
/usr/lib/gcc-lib/i386-redhat-linux/2.96/specs

I wonder if I should just re-install RedHat, or is there any hope
otherwise??

Mark Richards


> -----Original Message-----
> From: David Woodhouse [mailto:dwmw2@infradead.org]
> Sent: Tuesday, January 20, 2004 13:11
> To: Mark Richards
> Cc: linux-mtd@lists.infradead.org
> Subject: RE: MTD - DOC 2000 freezes on umount
> 
> On Tue, 2004-01-20 at 13:04 -0500, Mark Richards wrote:
> > drivers/mtd/chips/Config.in: 14: unknown command
> 
> Try 'make oldconfig' instead.
> 
> --
> dwmw2

RE: MTD - DOC 2000 freezes on umount

[Mark Richards]

I finally managed to get a good build running on the 2.4.24 kernel on RedHat
7.2, applying the MTD drivers.  Here's what I had to do:

1. Copy the sources (not link them).
2. Include the JFFS drivers.
3. Use make oldconfig (make xconfig is not properly supported by one of the
MTD make files)

In a previous try I also had to fix one of the sources which had an extra
parameter defined, but in my finally-successful build this problem did not
show up.  

So the problem I had - lock up when issuing a umount - is resolved, but it
was not easy getting there :)

I can't explain why the MTD version that ships with the 2.4.24 kernel has
this problem and I can't find any reference to it searching the newsgroups,
etc.  


Mark Richards


> -----Original Message-----
> From: Matthew S. McClintock [mailto:mattsm@arlut.utexas.edu]
> Sent: Tuesday, January 20, 2004 13:28
> To: David Woodhouse
> Cc: Mark Richards; linux-mtd@lists.infradead.org
> Subject: RE: MTD - DOC 2000 freezes on umount
> 
> On Tue, 2004-01-20 at 12:22, David Woodhouse wrote:
> 
> > Bizarre. It's a define_bool, which is relatively new -- but not so new
> > it's not in 2.4.24, I thought. As you're only interested in the
> > DiskOnChip drivers, you're right that it doesn't affect you (assuming
> > that's what you meant:)
> 
> I'm using the linuxppc_2_4_devel tree if that helps any.
> 
> --
> Matthew S. McClintock <mattsm@arlut.utexas.edu>