about ubifs question

about ubifs question

[tommy]

hi,sir!

about ubifs work under Kernel suspend and resume

When Kernel resume from suspend by apm -s ,

i touch file in nand flash and sync,but when Kernel restart ,my touched
file didn't occur!

After Kernel resume ,i guess my touched file isn't in nand flash but
memory !

My ubifs version is 2.6.24 ,does it is relation with Nand flash or
ubifs ?

Re: about ubifs question

[Artem Bityutskiy]

On Wed, 2009-08-19 at 12:39 +0800, tommy wrote:
> about ubifs work under Kernel suspend and resume
> 
> When Kernel resume from suspend by apm -s ,
> 
> i touch file in nand flash and sync,but when Kernel restart ,my touched
> file didn't occur!

How do you restart your kernel? Do you unmount cleanly?

> After Kernel resume ,i guess my touched file isn't in nand flash but
> memory !

Try typing sync before restarting.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

Re: about ubifs question

[Artem Bityutskiy]

On Wed, 2009-08-19 at 13:35 +0800, tommy wrote:
> Halt --->Power on 

Then please, find the answers here:
http://www.linux-mtd.infradead.org/doc/ubifs.html#L_writeback

and also take a look here, please:
http://www.infradead.org/~dwmw2/email.html

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)

Re: about ubifs question

[tommy]

hi,sir !

Can you explain why my ubifs switch to read-only filesystem when it resume from suspend !

Unmounting local filesystems...
mount: can't find /mnt/ram in /proc/mounts
UBIFS error (pid 1201): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
UBIFS error (pid 1201): ubifs_write_inode: can't write inode 135, error -30
UBIFS error (pid 1201): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
UBIFS error (pid 1201): ubifs_write_inode: can't write inode 442, error -30
UBIFS error (pid 1201): make_reservation: cannot reserve 160 bytes in jhead 1, error -30
UBIFS error (pid 1201): ubifs_write_inode: can't write inode 136, error -30
UBIFS: cannot re-mount due to prior errors
mount: mounting ubi0:rootfs on / failed: Read-only file system


On 三, 2009-08-19 at 08:13 +0300, Artem Bityutskiy wrote:
> On Wed, 2009-08-19 at 12:39 +0800, tommy wrote:
> > about ubifs work under Kernel suspend and resume
> > 
> > When Kernel resume from suspend by apm -s ,
> > 
> > i touch file in nand flash and sync,but when Kernel restart ,my touched
> > file didn't occur!
> 
> How do you restart your kernel? Do you unmount cleanly?
> 
> > After Kernel resume ,i guess my touched file isn't in nand flash but
> > memory !
> 
> Try typing sync before restarting.
> 

Re: about ubifs question

[tommy]

hi,sir!

when i resume form suspend,i try to do following:

root@localhost:/# cp 1.ko 2.ko
root@localhost:/# sync
root@localhost:/# ls
UBIFS error (pid 1107): ubifs_read_node: bad node type (255 but expected
2)
UBIFS error (pid 1107): ubifs_read_node: bad node at LEB 502:7224
UBIFS error (pid 1107): ubifs_readdir: cannot find next direntry, error
-22
root@localhost:/# ls 
UBIFS error (pid 1108): ubifs_read_node: bad node type (255 but expected
2)
UBIFS error (pid 1108): ubifs_read_node: bad node at LEB 502:7224
UBIFS error (pid 1108): ubifs_readdir: cannot find next direntry, error
-22


can't access !

why ?
On 三, 2009-08-19 at 08:13 +0300, Artem Bityutskiy wrote:
> On Wed, 2009-08-19 at 12:39 +0800, tommy wrote:
> > about ubifs work under Kernel suspend and resume
> > 
> > When Kernel resume from suspend by apm -s ,
> > 
> > i touch file in nand flash and sync,but when Kernel restart ,my touched
> > file didn't occur!
> 
> How do you restart your kernel? Do you unmount cleanly?
> 
> > After Kernel resume ,i guess my touched file isn't in nand flash but
> > memory !
> 
> Try typing sync before restarting.
> 

Re: about ubifs question

[tommy]

hi,sir !

I have fix my error !

it is cause by Nand flash register isn't correct when kernel resume !

it is caused by MCU software area lock!
On 三, 2009-08-19 at 08:13 +0300, Artem Bityutskiy wrote:
> linux-mtd@lists.infradead.org