* JFFS and RTLinux
@ 2001-07-26 10:08 Jan Debiec
0 siblings, 0 replies; 7+ messages in thread
From: Jan Debiec @ 2001-07-26 10:08 UTC (permalink / raw)
To: linux-mtd
Hello,
I'm trying to use RealTimeLinux (RTL 3.0 pre9) on Arcom MediaGX SBC
(2.2.17 with MTD and JFFS1)
AS condition to run RTL, kernel (2.2.17) must be compiled with SMP flag
set on.
But then the JFFS is not running properly, kernel is not able to mount
the /dev/mtdblock2 as root fs. After message "Building JFFS fs crash
recovery tree ... " system is hanging.
Do you know the solution?
Jan
--
----------------------------------
Jan Debiec
Jurca Optoelektronik
Raiffeisenstr. 5D
D-63110 Rodgau (Dudenhofen)
Germany
tel +49 6106 8290 20
fax +49 6106 8290 26
email jan.debiec@jurca.de
www.jurca.de
----------------------------------
^ permalink raw reply [flat|nested] 7+ messages in thread
* RE: JFFS and RTLinux
@ 2001-07-26 12:29 Vipin Malik
2001-07-30 14:40 ` Jan Debiec
0 siblings, 1 reply; 7+ messages in thread
From: Vipin Malik @ 2001-07-26 12:29 UTC (permalink / raw)
To: 'Jan Debiec ', 'linux-mtd@lists.infradead.org '
I know that at least with RTAI, you can set the SMP flag off and then use
the 8259 timer UP scheduler. RTL does not have something similar?
Vipin
P.S. I assume that without the SMP flag (and RTLinux) everything works fine?
-----Original Message-----
From: Jan Debiec
To: linux-mtd@lists.infradead.org
Sent: 7/26/01 5:08 AM
Subject: JFFS and RTLinux
Hello,
I'm trying to use RealTimeLinux (RTL 3.0 pre9) on Arcom MediaGX SBC
(2.2.17 with MTD and JFFS1)
AS condition to run RTL, kernel (2.2.17) must be compiled with SMP flag
set on.
But then the JFFS is not running properly, kernel is not able to mount
the /dev/mtdblock2 as root fs. After message "Building JFFS fs crash
recovery tree ... " system is hanging.
Do you know the solution?
Jan
--
----------------------------------
Jan Debiec
Jurca Optoelektronik
Raiffeisenstr. 5D
D-63110 Rodgau (Dudenhofen)
Germany
tel +49 6106 8290 20
fax +49 6106 8290 26
email jan.debiec@jurca.de
www.jurca.de
----------------------------------
______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: JFFS and RTLinux
2001-07-26 12:29 Vipin Malik
@ 2001-07-30 14:40 ` Jan Debiec
2001-07-30 15:21 ` Vipin Malik
2001-08-07 7:56 ` David Woodhouse
0 siblings, 2 replies; 7+ messages in thread
From: Jan Debiec @ 2001-07-30 14:40 UTC (permalink / raw)
To: Vipin Malik, 'linux-mtd@lists.infradead.org '
Thanks Vipin,
I've installed RTAI-1.6 as UP with Arcom-2.2.17 kernel (by RTAI
configuration, you don't need to set SMP flag) and the Arcom board is
running. Not only board, the RTAI tests are running on Arcom too
Jan
P.S. But the question is still open, why has MTD and JFFS problems with
SMP flag set in kernel config.
Vipin Malik wrote:
>
> I know that at least with RTAI, you can set the SMP flag off and then use
> the 8259 timer UP scheduler. RTL does not have something similar?
>
> Vipin
>
> P.S. I assume that without the SMP flag (and RTLinux) everything works fine?
>
> -----Original Message-----
> From: Jan Debiec
> To: linux-mtd@lists.infradead.org
> Sent: 7/26/01 5:08 AM
> Subject: JFFS and RTLinux
>
> Hello,
>
> I'm trying to use RealTimeLinux (RTL 3.0 pre9) on Arcom MediaGX SBC
> (2.2.17 with MTD and JFFS1)
> AS condition to run RTL, kernel (2.2.17) must be compiled with SMP flag
> set on.
> But then the JFFS is not running properly, kernel is not able to mount
> the /dev/mtdblock2 as root fs. After message "Building JFFS fs crash
> recovery tree ... " system is hanging.
> Do you know the solution?
>
> Jan
> --
> ----------------------------------
> Jan Debiec
> Jurca Optoelektronik
> Raiffeisenstr. 5D
> D-63110 Rodgau (Dudenhofen)
> Germany
>
> tel +49 6106 8290 20
> fax +49 6106 8290 26
> email jan.debiec@jurca.de
> www.jurca.de
> ----------------------------------
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
--
----------------------------------
Jan Debiec
Jurca Optoelektronik
Raiffeisenstr. 5D
D-63110 Rodgau (Dudenhofen)
Germany
tel +49 6106 8290 20
fax +49 6106 8290 26
email jan.debiec@jurca.de
www.jurca.de
----------------------------------
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: JFFS and RTLinux
2001-07-30 14:40 ` Jan Debiec
@ 2001-07-30 15:21 ` Vipin Malik
2001-08-07 7:56 ` David Woodhouse
1 sibling, 0 replies; 7+ messages in thread
From: Vipin Malik @ 2001-07-30 15:21 UTC (permalink / raw)
To: Jan Debiec; +Cc: 'linux-mtd@lists.infradead.org ', David Woodhouse
Jan Debiec wrote:
> Thanks Vipin,
>
> I've installed RTAI-1.6 as UP with Arcom-2.2.17 kernel (by RTAI
> configuration, you don't need to set SMP flag) and the Arcom board is
> running. Not only board, the RTAI tests are running on Arcom too
>
> Jan
>
> P.S. But the question is still open, why has MTD and JFFS problems with
> SMP flag set in kernel config.
If I was forced to make a single guess, I would say that spin locks are probably
not being properly handled somewhere.
I cannot speak more intelligently beyond this :)
Vipin
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: JFFS and RTLinux
2001-07-30 14:40 ` Jan Debiec
2001-07-30 15:21 ` Vipin Malik
@ 2001-08-07 7:56 ` David Woodhouse
2001-08-09 10:57 ` Jan Debiec
1 sibling, 1 reply; 7+ messages in thread
From: David Woodhouse @ 2001-08-07 7:56 UTC (permalink / raw)
To: Jan Debiec; +Cc: Vipin Malik, 'linux-mtd@lists.infradead.org '
jan.debiec@jurca.de said:
> P.S. But the question is still open, why has MTD and JFFS problems
> with SMP flag set in kernel config.
Reproduce on a non-RT kernel and use SysRq-P to find where it's blocking.
--
dwmw2
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: JFFS and RTLinux
2001-08-07 7:56 ` David Woodhouse
@ 2001-08-09 10:57 ` Jan Debiec
2001-08-09 11:12 ` David Woodhouse
0 siblings, 1 reply; 7+ messages in thread
From: Jan Debiec @ 2001-08-09 10:57 UTC (permalink / raw)
To: David Woodhouse, 'linux-mtd@lists.infradead.org '
Cc: Alex Lennon @ Arcom
Hi David,
as you suggested,
David Woodhouse wrote:
> jan.debiec@jurca.de said:
> > P.S. But the question is still open, why has MTD and JFFS problems
> > with SMP flag set in kernel config.
>
> Reproduce on a non-RT kernel and use SysRq-P to find where it's blocking.
the results:
EIP: 0010:[<c01986d3>] EFLAGS: 00000202
... EBP: c01d0040
in system.map for that kernel:
c0195940 T stext_lock
c019b360 R lk_lockmsg
...
c01d0040 d sbc_mediagx_map
unfortunately "stext_lock" tells me nothing (is used in head.S),
sbc_mediagx_map is a structure used for Arcom GXM board
Jan
--
----------------------------------
Jan Debiec
Jurca Optoelektronik
Raiffeisenstr. 5D
D-63110 Rodgau (Dudenhofen)
Germany
tel +49 6106 8290 20
fax +49 6106 8290 26
email jan.debiec@jurca.de
www.jurca.de
----------------------------------
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: JFFS and RTLinux
2001-08-09 10:57 ` Jan Debiec
@ 2001-08-09 11:12 ` David Woodhouse
0 siblings, 0 replies; 7+ messages in thread
From: David Woodhouse @ 2001-08-09 11:12 UTC (permalink / raw)
To: Jan Debiec; +Cc: 'linux-mtd@lists.infradead.org ', Alex Lennon @ Arcom
jan.debiec@jurca.de said:
> unfortunately "stext_lock" tells me nothing (is used in head.S),
> sbc_mediagx_map is a structure used for Arcom GXM board
Spinlock deadlock. Check the spin_lock() and spin_unlock() pairs are evenly
matched in sbc_mediagx.c (they look like they are in the current version of
sbc_gxx.c).
$ gdb vmlinux
(gdb) disassemble 0xc01986d3
It should be in a loop which looks something like
0xc0263620 <stext_lock+64>: cmpb $0x0,0xc02ccdf8
0xc0263627 <stext_lock+71>: repz nop
0xc0263629 <stext_lock+73>: jle 0xc0263620 <stext_lock+64>
0xc026362b <stext_lock+75>: jmp 0xc0105b3f <__down+111>
The place it's jumping to in the final line is the place that's trying to
obtain the (blocked) spinlock.
--
dwmw2
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2001-08-09 11:06 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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2001-07-26 10:08 JFFS and RTLinux Jan Debiec
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2001-07-26 12:29 Vipin Malik
2001-07-30 14:40 ` Jan Debiec
2001-07-30 15:21 ` Vipin Malik
2001-08-07 7:56 ` David Woodhouse
2001-08-09 10:57 ` Jan Debiec
2001-08-09 11:12 ` David Woodhouse
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