topic Re: 3.0.35 kernel on iMX6Q Sabre Lite in i.MX Processors

3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 08 Oct 2012 15:04:57 GMT

I've recently tried the 3.0.35 kernel from L3.0.35_12.09.03_ER. It is very unstable no matter what kernel configuration I'm using, even on kernel provided in debian package in L3.0.35_12.09.03_ER

It crashes with errors like:

Unable to handle kernel paging request at virtual address ffffffff

pgd = ba2f4000

[ffffffff] *pgd=4fffe821, *pte=00000000, *ppte=00000000

Internal error: Oops: 17 [#1] PREEMPT SMP

Modules linked in:

CPU: 1 Not tainted (3.0.35 #1)

PC is at anon_vma_clone+0x4c/0x158

LR is at anon_vma_clone+0x3c/0x158

pc : [<800e0504>] lr : [<800e04f4>] psr: a00f0013

sp : bff8be78 ip : 0bfd7000 fp : 80ad8d40

r10: 00000000 r9 : ba142cf0 r8 : baa561c8

r7 : bff0e840 r6 : 00000000 r5 : ffffffff r4 : bfa31f78

r3 : bff8a000 r2 : 80a7fc90 r1 : 8003d004 r0 : bfa31f78

Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user

Control: 10c53c7d Table: 4a2f404a DAC: 00000015

Process init (pid: 1, stack limit = 0xbff8a2f0)

Stack: (0xbff8be78 to 0xbff8c000)

be60: 2ab98fff bff0e878

be80: 80ad8d20 ba142cb8 bff0e840 ba142cb8 bff0e754 80acdd20 00000001 bff0e738

bea0: bc0b07dc 800e0630 bff0e840 bfc29040 ba142cb8 bff0e754 80acdd20 8007138c

bec0: bffd2054 00000020 bff0e744 bff0e758 bfc28000 bff8a000 bfc2803c bfc2907c

bee0: bc0178cc ba050000 01200011 80acdd20 bff8bf08 00000000 bff8bfb0 bff8a000

bf00: 7eabd718 80072118 bfd82c80 80a97fe0 ba0501d8 ba0501d0 bff8a000 00000000

bf20: 00000000 ba050124 00000020 00000000 bffd2000 01200011 00000000 2ab91360

bf40: 00000000 800416c4 bff8a000 00000000 2ad08000 80072534 2ab913c8 00000000

bf60: 00000000 bff8bf80 800416c4 7eabd91c 00000008 00000000 7eabd91c 80081910

bf80: 7ffbfeff fffffffe 00000000 00000000 0000000b 2ab913c8 7eabd720 2ab91360

<0>bfa0: 00000078 80041540 00000000 2ab913c8 01200011 00000000 00000000 00000000

bfc0: 2ab913c8 7eabd720 2ab91360 00000078 2ab91820 00000001 00000001 2ad08000

bfe0: 00000078 7eabd718 2ac97edf 2ac41276 000f0030 01200011 00000000 00000000

[<800e0504>] (anon_vma_clone+0x4c/0x158) from [<800e0630>] (anon_vma_fork+0x20/)

[<800e0630>] (anon_vma_fork+0x20/0x130) from [<8007138c>] (dup_mm+0x1a8/0x4d8)

[<8007138c>] (dup_mm+0x1a8/0x4d8) from [<80072118>] (copy_process+0x9e4/0xdb8)

[<80072118>] (copy_process+0x9e4/0xdb8) from [<80072534>] (do_fork+0x48/0x2a4)

[<80072534>] (do_fork+0x48/0x2a4) from [<80041540>] (ret_fast_syscall+0x0/0x30)

Code: e2504000 11a0a006 0a000024 e5985004 (e5956000)

---[ end trace 8479eb65fc3380dc ]---

Virtual addresses are different each time.

With kernel 3.0.15 and the same rootfs everything works perfectly. Have somebody experienced simillar issue?

Googling the issue suggests that the broken memory might be an issue, but I run the memcheck program on 3.0.15 kernel and it founds nothing.

I would really appreciate any help.

Regards,

Marcin Miklas

PS. More crashes attached.

Original Attachment has been moved to: 3.0.35_crashes.zip

Re: 3.0.35 kernel on iMX6Q Sabre Lite

daiane_angolini — Thu, 11 Oct 2012 17:00:22 GMT

I´m not sure which iMX6Q Sabre Lite board do you have.

Please, double check your sabre lite board is supported on 3.0.35 kernel. If it was not supported, please, use 3.0.35 kernel from Boundary Devices.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Thu, 11 Oct 2012 17:16:09 GMT

I've got 3.0.35 running on my Sabre Lite from the 12.08 BSP. Just a default config from ltib, pretty much default rootfs ( added and configured dropbear only ).

I've not tried 12.09 BSP.

Regards,

Randy

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Fri, 12 Oct 2012 12:39:11 GMT

Board's revision date is 10-18-11, I guess this i pretty old revision.

I've tried kernel from 12.08 BSP (installed from .deb file provided by freescale) and from boundary devices also (self compiled).

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Fri, 12 Oct 2012 14:02:03 GMT

Did you build the kernel yourself using ltib?

Re: 3.0.35 kernel on iMX6Q Sabre Lite

daiane_angolini — Sat, 13 Oct 2012 16:09:41 GMT

What defconfig file are you using?

What toolchain version are you using?

Could you, please, share the git source?

I would like to give it a try by my own.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

JasonLiu — Sun, 14 Oct 2012 06:17:13 GMT

This 12.09.03 release is for the i.MX6DL Beta release. Could you please use the i.MX6Q GA release, which has been released out recently.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 15 Oct 2012 11:28:54 GMT

I've took oneiric.tar.gz from L3.0.35_12.09.01_GA_images_MX6Q. Upgraded u-boot on the board to u-boot-mx6q-sabrelite.bin. Modified uboot environment a little to make it able read kernel from rootfs.

Problems are basically the same.

3.0.35 crash - Pastebin.com

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Mon, 15 Oct 2012 11:33:36 GMT

DId you use the kernel from L3.0.35_12.09.01_GA_images_MX6Q as well?

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 15 Oct 2012 11:42:08 GMT

yes, the one from /boot folder in oneiric.tar.gz

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Mon, 15 Oct 2012 12:18:13 GMT

What do you uboot environment variables look like?

Regards,

Randy Krakora

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 15 Oct 2012 12:30:16 GMT

MX6Q SABRELITE U-Boot > printenv

bootdelay=3

baudrate=115200

ipaddr=192.168.1.103

serverip=_SERVER_IP_ADDR_

netmask=255.255.255.0

loadaddr=0x10800000

rd_loadaddr=0x11000000

netdev=eth0

ethprime=FEC0

uboot=u-boot.bin

kernel=uImage

bootargs=console=ttymxc1,115200

bootargs_base=setenv bootargs console=ttymxc1,115200

bootargs_nfs=setenv bootargs ${bootargs} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666

bootcmd_net=dhcp; run bootargs_base bootargs_nfs;bootm

bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

bootcmd=run bootcmd_mmc

clearenv=sf probe 1 && sf erase 0xc0000 0x2000 && echo restored environment to factory default

upgradeu=for disk in 0 1 ; do mmc dev ${disk} ;for fs in fat ext2 ; do ${fs}load mmc ${disk}:1 10008000 /6q_upgrade && source 10008000 ; done ; done

bootfile=_BOOT_FILE_PATH_IN_TFTP_

nfsroot=_ROOTFS_PATH_IN_NFS_

ethact=FEC0

bootcmd_mmc=for disk in 0 1 ; do mmc dev ${disk} ;for fs in fat ext2 ; do ${fs}load mmc ${disk}:1 10008000 /6q_bootscript && source 10008000 ;done ;done

stdin=serial

stdout=serial

stderr=serial

Environment size: 1171/8188 bytes

6q_bootscript contents:

set bootargs $bootargs root=/dev/mmcblk0p1 rootwait fixrtc ;

ext2load mmc ${disk}:1 10800000 /boot/uImage && bootm 10800000 ;

echo "Error loading kernel image"

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Mon, 15 Oct 2012 13:32:44 GMT

Ok, this is a bit different from mine, I've had my board for a long time though and have been building with ltib, so I'll download the 12.09 images and try to put everything back to default and see what happens.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

daiane_angolini — Mon, 15 Oct 2012 13:42:27 GMT

"Error loading kernel image" is not an kernel error.

Your u-boot configuration are not good enough. Or, your kernel was not copied to right place.

Could you, please, use the default u-boot configurations and let me know the results?

And, could you, please, share how you copy uImage to your board?

(I thought you was getting a kernel crash)

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 15 Oct 2012 13:51:43 GMT

The uboot config is good enough, it loads the kernel properly and runs it. The kernel gives the error:

"Unable to handle kernel paging request at virtual address 0004e844"

Also this uboot config runs 3.0.15 kernel properly.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

marcinmiklas — Mon, 15 Oct 2012 13:54:03 GMT

Thanks, let me know what are the results. Also note my board revision (10-18-11).

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Mon, 15 Oct 2012 13:55:38 GMT

I think Daiane was looking at your uboot params and saw the "echo "Error loading kernel image"" and assumed it was an error you were getting. :smileyhappy:

Re: 3.0.35 kernel on iMX6Q Sabre Lite

JeffKudrick — Mon, 15 Oct 2012 14:50:34 GMT

In the U-Boot bootargs, the following doesn't seem correct:

video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

If the system is using dual-display, the second video needs to be on another framebuffer.

Jeff

Re: 3.0.35 kernel on iMX6Q Sabre Lite

daiane_angolini — Mon, 15 Oct 2012 17:31:22 GMT

Exactly, RandyKrakora.

It was my fault. Sorry for missunderstood your message marcinmiklas.

Re: 3.0.35 kernel on iMX6Q Sabre Lite

RandyKrakora — Tue, 16 Oct 2012 14:59:15 GMT

I downloaded the 12.09 images, set up a uSD card just like yours and it loads and runs fine. I used the rootfs, not oneiric rootfs, but my uImage is stored on the uSD in /boot and loaded by 6q_bootscript.

You could try a little different setup, by burning the kernel to the uSD and use the "old" way to load it:

( Take care to use this command, make sure you get the correct device and not an internal hard drive )

( cat /proc/mounts will help you determine )

sudo dd if=rootfs/boot/uImage of=/dev/sdX seek=2k bs=512 && sync && sync

bootcmd_mmc=run bootargs_base bootargs_mmc;mmc dev 1;mmc read ${loadaddr} 0x800 0x2000;bootm

bootargs_mmc=setenv bootargs ${bootargs} root=/dev/mmcblk0p1 rootwait rw video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666

This method is not much different than what you are using though.

Do you have any devices connected to the Sabre Lite? I would recommend disconnecting everything except the power supply, uSD and console cable, see if that helps.