* problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
@ 2004-07-20 8:56 Aras Vaichas
2004-07-20 9:41 ` Thomas Gleixner
2004-07-20 12:33 ` David Woodhouse
0 siblings, 2 replies; 6+ messages in thread
From: Aras Vaichas @ 2004-07-20 8:56 UTC (permalink / raw)
To: MTD-LIST
I can't seem to mount a partition greater than about 3.3MB. All
partitions below this size *seem* to work fine.
a partition of this size will mount:
hex: 0x34c980, decimal: 3459456, erase blocks: 3276
a partition greater than or equal to this size will NOT mount:
hex: 0x34cda0, decimal: 3460512, erase blocks: 3277
I am running Linux-2.4.6-VRS-1 on the AT91RM9200DK development board. I
have tried using command line partitions and setting at91_dataflash.c,
it makes no difference.
My kernel command line is:
root=/dev/ram=rx initrd=0x21100000,6000000 ramdisk_size=15360
console=ttyS0,115200,mem=32M
mtdparts=dataflash0:1047552(kernel_image)ro,0x400080(4MB_part),0x3000
60(3MB_part),-(the_rest)
This gives:
dev: size erasesize name
mtd0: 00200000 00010000 "Physically mapped flash"
mtd1: 000ffc00 00000420 "kernel_image"
mtd2: 00400080 00000420 "4MB_part"
mtd3: 00300060 00000420 "3MB_part"
mtd4: 00040320 00000420 "the_rest"
mtd3 and mtd4 will mount, mtd2 will not mount. e.g.
$mount -t jffs2 /dev/mtdblock/2 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/mtdblock/2,
or too many mounted file systems
[root@AT91RM9200DK /root]$
I did notice one other strange thing. I turned on a DEBUG option in
at91_dataflash.c that showed all access to the dataflash device. When I
mounted the mtd3 or mtd4, it showed reading activity going on with the
dataflash. But when I mounted mtd2, the dataflash was not even accessed.
It is like the software isn't even getting that far.
e.g. mounting mtd4, note the debug output
[root@AT91RM9200DK /root]$mount -t jffs2 /dev/mtdblock/4 /mnt/4
dataflash_read: 8387808 .. 8388864, 1056, 0x0420 bytes
READ: (e8) f8 38 0
data: 85, 19, 03, 20, 0c, 00, 00, 00, b1, b0, 1e, e4, ff, ff, ff, ff,
dataflash_read: 8387808 .. 8387820, 12, 0x000c bytes
... SNIP ...
dataflash_read: 8648720 .. 8648764, 44, 0x002c bytes
READ: (e8) ff f0 50
data: 85, 19, 01, e0, 2c, 00, 00, 00, 5f, 56, f1, e0, 01, 00, 00, 00,
[root@AT91RM9200DK /root]$mount
/dev/rd/0 on / type ext2 (ro)
/proc on /proc type proc (rw)
/dev/mtdblock/4 on /mnt/4 type jffs2 (rw)
e.g. mounting mtd2, note the lack of debug output
[root@AT91RM9200DK /root]$mount -t jffs2 /dev/mtdblock/2 /mnt/2
mount: wrong fs type, bad option, bad superblock on /dev/mtdblock/2,
or too many mounted file systems
It doesn't even access the dataflash. So I suspect that something in a
higher layer is saying that this partition isn't valid.
Any help or hints would be appreciated.
Aras
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
2004-07-20 8:56 problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK Aras Vaichas
@ 2004-07-20 9:41 ` Thomas Gleixner
2004-07-21 0:45 ` Aras Vaichas
2004-07-20 12:33 ` David Woodhouse
1 sibling, 1 reply; 6+ messages in thread
From: Thomas Gleixner @ 2004-07-20 9:41 UTC (permalink / raw)
To: Aras Vaichas; +Cc: MTD-LIST
On Tue, 2004-07-20 at 10:56, Aras Vaichas wrote:
> I did notice one other strange thing. I turned on a DEBUG option in
> at91_dataflash.c that showed all access to the dataflash device. When I
> mounted the mtd3 or mtd4, it showed reading activity going on with the
> dataflash. But when I mounted mtd2, the dataflash was not even accessed.
> It is like the software isn't even getting that far.
Turn on MTD_DEBUG and JFFS2_DEBUG and provide the output of those
tglx
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
2004-07-20 8:56 problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK Aras Vaichas
2004-07-20 9:41 ` Thomas Gleixner
@ 2004-07-20 12:33 ` David Woodhouse
1 sibling, 0 replies; 6+ messages in thread
From: David Woodhouse @ 2004-07-20 12:33 UTC (permalink / raw)
To: Aras Vaichas; +Cc: MTD-LIST
On Tue, 2004-07-20 at 18:56 +1000, Aras Vaichas wrote:
> I am running Linux-2.4.6-VRS-1 on the AT91RM9200DK development board. I
> have tried using command line partitions and setting at91_dataflash.c,
> it makes no difference.
That's a lot of eraseblocks. I think your problem is fixed in 2.6.8-rc2.
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
2004-07-20 9:41 ` Thomas Gleixner
@ 2004-07-21 0:45 ` Aras Vaichas
2004-07-21 2:51 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: Aras Vaichas @ 2004-07-21 0:45 UTC (permalink / raw)
To: MTD-LIST
Thomas Gleixner wrote:
> Turn on MTD_DEBUG and JFFS2_DEBUG and provide the output of those
>
> tglx
>
OK, three examples:
(1) mounting a small jffs2 partition
[root@AT91RM9200DK /root]$more /proc/mtd
dev: size erasesize name
mtd0: 00200000 00010000 "Physically mapped flash"
mtd1: 000ffc00 00000420 "kernel_image"
mtd2: 00400080 00000420 "4MB_part"
mtd3: 00300060 00000420 "3MB_part"
mtd4: 00040320 00000420 "the_rest"
[root@AT91RM9200DK /root]$mount /dev/mtdblock/4 /mnt/4
mtdblock_open
ok
mtdblock: read on "the_rest" at 0x0, size 0x800
mtdblock: read on "the_rest" at 0x800, size 0x800
mtdblock: read on "the_rest" at 0x2000, size 0x800
mtdblock: read on "the_rest" at 0x2800, size 0x800
mtdblock: read on "the_rest" at 0x3000, size 0x800
mtdblock: read on "the_rest" at 0x3800, size 0x800
mtdblock: read on "the_rest" at 0x8000, size 0x800
mtdblock: read on "the_rest" at 0x8800, size 0x800
mtdblock: read on "the_rest" at 0x9000, size 0x800
mtdblock: read on "the_rest" at 0x9800, size 0x800
mtdblock_release
ok
mtdblock_open
ok
(2) mounting a large jffs2 partition, no fs type specified
[root@AT91RM9200DK /root]$mount /dev/mtdblock/2 /mnt/2
mtdblock_open
ok
mtdblock: read on "4MB_part" at 0x0, size 0x800
mtdblock: read on "4MB_part" at 0x800, size 0x800
mtdblock: read on "4MB_part" at 0x2000, size 0x800
mtdblock: read on "4MB_part" at 0x2800, size 0x800
mtdblock: read on "4MB_part" at 0x3000, size 0x800
mtdblock: read on "4MB_part" at 0x3800, size 0x800
mtdblock: read on "4MB_part" at 0x8000, size 0x800
mtdblock: read on "4MB_part" at 0x8800, size 0x800
mtdblock: read on "4MB_part" at 0x9000, size 0x800
mtdblock: read on "4MB_part" at 0x9800, size 0x800
mtdblock_release
ok
mtdblock_open
ok
mtdblock_release
ok
mount: you must specify the filesystem type
(3) mounting a large jffs2 partition, jffs2 type specified
[root@AT91RM9200DK /root]$mount -t jffs2 /dev/mtdblock/2 /mnt/2
mtdblock_open
ok
mtdblock_release
ok
mountmtdblock_open
:ok
wrong fsmtdblock_release
ok
type, bad option, bad superblock on /dev/mtdblock/2,
or too many mounted file systems
[root@AT91RM9200DK /root]$
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
2004-07-21 0:45 ` Aras Vaichas
@ 2004-07-21 2:51 ` David Woodhouse
2004-07-21 4:14 ` Aras Vaichas
0 siblings, 1 reply; 6+ messages in thread
From: David Woodhouse @ 2004-07-21 2:51 UTC (permalink / raw)
To: Aras Vaichas; +Cc: MTD-LIST
On Wed, 2004-07-21 at 10:45 +1000, Aras Vaichas wrote:
> OK, three examples:
That's precisely as I expected -- you have too many erase blocks, the
kmalloc fails and the mount fails without ever trying to read from the
flash.
As I said, it's fixed in the current 2.6 kernel.
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK
2004-07-21 2:51 ` David Woodhouse
@ 2004-07-21 4:14 ` Aras Vaichas
0 siblings, 0 replies; 6+ messages in thread
From: Aras Vaichas @ 2004-07-21 4:14 UTC (permalink / raw)
Cc: MTD-LIST
David Woodhouse wrote:
> On Wed, 2004-07-21 at 10:45 +1000, Aras Vaichas wrote:
>
> As I said, it's fixed in the current 2.6 kernel.
>
I would love to be using the 2.6 kernel but there was this fairly recent
email from SAN people ...
What can I do?
# To: linux-arm@xxxxxxxxxxxxxxxxxxxxxx
# Subject: Re: linux and the at91rm9200
# From: Andrew Victor <andrew@xxxxxxxxxxxxx>
# Date: 03 Jun 2004 19:21:29 +0200
> Just get 2.6.6.
The AT91RM9200 is currently only supported by the 2.4 kernels.
Latest version is 2.4.26-vrs1.
Regards,
Andrew Victor
SAN People
^ permalink raw reply [flat|nested] 6+ messages in thread
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2004-07-20 8:56 problems mounting >3.3MB JFFS2 partitions on Dataflash on AT91RM9200DK Aras Vaichas
2004-07-20 9:41 ` Thomas Gleixner
2004-07-21 0:45 ` Aras Vaichas
2004-07-21 2:51 ` David Woodhouse
2004-07-21 4:14 ` Aras Vaichas
2004-07-20 12:33 ` David Woodhouse
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