On Fri, 2013-11-22 at 13:58 +0800, Alex Shi wrote:
On 11/21/2013 01:09 PM, Nicolas Pitre wrote:
I've been banging my head on this one for quite a while now. The
problem is that there is very little debug out put available. Could you
see if you get the same?
Mainline kernel (I'm using commit 527d151131 right now but older kernels
are also affected). Most interesting config options:
Yes, I am using this kernel too. but when I try to update kernel and dtb in lava lab's mphackbox, the kernel even can not boot up.
I am using vexpress-v2p-ca15_a7.dts and vexpress_defconfig, Did I miss sth?
============
Begin: Loading essential drivers ... done.
Begin: Runnimmci-pl18x 1c050000.mmci: no support for card's volts
ng /scripts/initmmc0: error -22 whilst initialising SD card
-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
mmci-pl18x 1c050000.mmci: no support for card's volts
mmc0: error -22 whilst initialising SD card
MMC seems to be currently broken in mainline on vexpress (looks like
usual problems around regulators we get every time someone messes with
mmci driver). I'm using USB for the rootfs and I think other people may
be using that too, or NFS, so won't be hitting that particular problem.
--
Tixy
> Begin: Running /scripts/local-premount ... FATAL: Could not load /lib/modules/3.12.0+/modules.dep: No such file or directory
> done.
> FATAL: Could not load /lib/modules/3.12.0+/modules.dep: No such file or directory
> EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
> Begin: Running /scripts/local-bottom ... done.
> done.
> Begin: Running /scripts/init-bottom ... mmci-pl18x 1c050000.mmci: no support for card's volts
> mmc0: error -22 whilst initialising SD card
> mount: mounting /dev on /root/dev failed: No such file or directory
> done.
> mmci-pl18x 1c050000.mmci: no support for card's volts
> mmc0: error -22 whilst initialising SD card
> mount: mounting /sys on /root/sys failed: No such file or directory
> mount: mounting /proc on /root/proc failed: No such file or directory
> Target filesystem doesn't have requested /sbin/init.
> /init: line 35mmci-pl18x 1c050000.mmci: no support for card's volts
> 2: can't open /rmmc0: error -22 whilst initialising SD card
> oot/dev/console: no such file
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200
>
> CPU: 0 PID: 1 Comm: init Tainted: G W 3.12.0+ #147
> [<8001548c>] (unwind_backtrace+0x0/0xf8) from [<80011aec>] (show_stack+0x10/0x14)
> [<80011aec>] (show_stack+0x10/0x14) from [<80426a44>] (dump_stack+0x70/0x8c)
> [<80426a44>] (dump_stack+0x70/0x8c) from [<80423f4c>] (panic+0x90/0x1e8)
> [<80423f4c>] (panic+0x90/0x1e8) from [<80023e74>] (do_exit+0x838/0x8d8)
> [<80023e74>] (do_exit+0x838/0x8d8) from [<8002401c>] (do_group_exit+0x3c/0xc4)
> [<8002401c>] (do_group_exit+0x3c/0xc4) from [<800240b4>] (__wake_up_parent+0x0/0x18)
>
> >
> > CONFIG_BL_SWITCHER=n
> > CONFIG_ARCH_VEXPRESS_TC2_PM=y
> > CONFIG_ARM_BIG_LITTLE_CPUIDLE=y
> > CONFIG_ARM_BIG_LITTLE_CPUFREQ=y
> > CONFIG_ARM_VEXPRESS_SPC_CPUFREQ=y
> >
> > To crash the kernel within 5 seconds:
> >
> > #!/bin/bash
> > echo 0 > /sys/kernel/bL_switcher/active
> > sleep 1
> > while true; do
> > for i in 0 1 2 3
> > do echo 0 > /sys/devices/system/cpu/cpu$i/online
> > done
> > for i in 3 2 1 0
> > do echo 1 > /sys/devices/system/cpu/cpu$i/online
> > done
> > for i in 4 3 2 1
> > do echo 0 > /sys/devices/system/cpu/cpu$i/online
> > done
> > for i in 1 2 3 4
> > do echo 1 > /sys/devices/system/cpu/cpu$i/online
> > done
> > done
> >
> > What I get is:
> >
> > [...]
> > CPU1: Booted secondary processor
> > CPU0: Booted secondary processor
> > Unable to handle kernel NULL pointer dereference at virtual address 0000000c
> > pgd = c0004000
> >
> > [ the output stops there ]
> >
> > The last CPU to be booted up is not always the same.
> >
> > Are you able to reproduce?
> >
> >
> > Nicolas
> >
> > _______________________________________________
> > linaro-kernel mailing list
> > linaro-kernel@lists.linaro.org
> >
http://lists.linaro.org/mailman/listinfo/linaro-kernel
> >
>
>
