[ARM-LINUX]Booting is stopped at CPSIE instruction
Hi all
I am trying to port opensource kernel on top of Qualcomm board.
I am struck at local_irq_enable() point in init/main.c,
start_kernel()
{
--- snip ---
call_function_init();
if (!irqs_disabled())
printk(KERN_CRIT start_kernel(): bug: interrupts were
enabled early\n);
early_boot_irqs_disabled = false;
local_irq_enable();
}
This functions implementation is like this...
static inline void arch_local_irq_enable(void)
{
asm volatile(
cpsie i @ arch_local_irq_enable
:
:
: memory, cc);
}
if i comment that local_irq_enable(), still the booting is not progressing.
Can any one pls help me out here??
--
With regards,
Sandeep Kumar Anantapalli,
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Re: kernel build error
On Tue, Apr 02, 2013 at 10:04:31AM +0700, Mulyadi Santosa wrote: Could you paste roughly 20-30 lines of boot messages when you hit the hung point? Kernel config alone usually can't help much I'm trying this on a Virtual Machine using VMware Player. When the VM boots up, it throws lots of messages on the console and then gets stuck. I'd like to know, how I can capture all those console logs till it hits the hung point. -Amit ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: cgroup.procs versus tasks (cgroups)
On Tue, Apr 02, 2013 at 05:54:56AM +0300, Kevin Wilson wrote: Hi? Any idea what is the difference cgroup.procs entry and tasks entry of cgroup sysfs? both represent pid lists. I ran: cat /sys/fs/cgroup/cpuset/cgroup.procs and cat /sys/fs/cgroup/cpuset/tasks and entries of cgroup.procs appear in tasks. However there are many more tasks than cgroup.procs: cat /sys/fs/cgroup/cpuset/cgroup.procs | wc -l 153 cat /sys/fs/cgroup/cpuset/tasks | wc -l 383 The difference you are seeing is because there are some multithreaded processes in your cpuset. In the cgroup.procs file, each such process apears only once (listed by its TGID). In the tasks file, each thread appears once (listed by its PID). Check the pidlist_array_load function in kernel/cgroup.c. procs is a list of (unique) TGIDs, while tasks is a list of PIDs. Hope this helps, Vlad ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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Re: [help] kernel oops in function gpio_to_irq
Hi Matthias, Le 30/03/2013 14:09, Matthias Brugger a écrit : El 27/03/2013 18:16, Mylene Josserand mylene.josser...@navocap.com mailto:mylene.josser...@navocap.com va escriure: Hi everyone, I have a problem with gpio functions. My kernel version is 3.8.2 and my SoC is a imX27 on a home-made board. First, when I boot, I had only the Starting kernel... message. So I rebuild my kernel with CONFIG_DEBUG_KERNEL, CONFIG_DEBUG_LL and CONFIG_EARLY_PRINTK. I have also add the line earlyprintk=console,UART0,115200 on the bootargs of my Barebox. With that, I can see more messages : [...] Unable to handle kernel NULL pointer dereference at virtual address 002c pgd = c0004000 [002c] *pgd= Internal error: Oops: 5 [#1] PREEMPT ARM Modules linked in: CPU: 0Not tainted (3.8.2+ #4) PC is at __gpio_to_irq+0x1c/0x44 LR is at navocap_baseboard_init+0xd8/0x2c8 pc : [c01fd194]lr : [c04fd468]psr: 6053 sp : c7835ef0 ip : 0079 fp : c05a5628 r10: c04f817c r9 : r8 : c05a562c r7 : c7834000 r6 : 0004 r5 : c05158c4 r4 : c0578844 r3 : 05ac r2 : c05b0410 r1 : c7834000 r0 : Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel Control: 0005317f Table: a0004000 DAC: 0017 Process swapper (pid: 1, stack limit = 0xc78341b8) Stack: (0xc7835ef0 to 0xc7836000) 5ee0: c05158c4 c04fd468 0002 10009000 5f00: 10009fff 0200 c05158c4 c04fd348 5f20: c0578844 c04f819c c04d23dc c00087f8 0003 0003 c04d1b2c c06bd6a0 5f40: c0578844 c05158c4 0004 008b c05a562c c0515898 c04f6378 5f60: c05a5620 c04f62a0 0003 0003 c04f6378 c00403e0 5f80: c03cfee0 c03cfeec 5fa0: c03cfee0 c00093b0 5fc0: 5fe0: 0013 0010 000a1000 [c01fd194] (__gpio_to_irq+0x1c/0x44) from [c04fd468] (navocap_baseboard_init+0xd8/0x2c8) [c04fd468] (navocap_baseboard_init+0xd8/0x2c8) from [c04f819c] (customize_machine+0x20/0x30) [c04f819c] (customize_machine+0x20/0x30) from [c00087f8] (do_one_initcall+0x2c/0x168) [c00087f8] (do_one_initcall+0x2c/0x168) from [c04f62a0] (kernel_init_freeable+0xf4/0x1cc) [c04f62a0] (kernel_init_freeable+0xf4/0x1cc) from [c03cfeec] (kernel_init+0xc/0x164) [c03cfeec] (kernel_init+0xc/0x164) from [c00093b0] (ret_from_fork+0x14/0x24) Code: e0433100 e1a0c000 e7920003 e24dd004 (e590302c) ---[ end trace 61bb09c25216d85b ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x000b The problem is in the function gpio_to_irq in my board init functions (navocap_baseboard_init). To know which lines the opps appears, I have followed this tutorial : https://wiki.ubuntu.com/Kernel/KernelDebuggingTricks Thanks to it, I can notice that the opps appears when I called the gpio_to_irq function in : ret = request_irq(gpio_to_irq(IMX_GPIO_NR(2,14)), detect_irq, IRQF_TRIGGER_FALLING, imx-mmc-detect, data); Make sure your arguments are not NULL (IMX_GPIO_NR, detect_irq and data). Some extra printk's before calling request_irq should do. Thank you very much for your help ! I will try that. I have checked in other boards how to use this function and it is configured in the same way. I did see where I have made a mistake. Maybe in my config file where I have missed a configuration option ? How to solve this opps problem ? It would be very great if someone could give me some helps / feedbacks on this problem. Thank you in advance ! Best regards, -- Mylène JOSSERAND Navocap ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org mailto:Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies Best regards, -- Mylène JOSSERAND Navocap ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Method to calculate user space thread size
Dear All, I have very complex user space application contain more then 400 threads. I want to limit the stack size in user space, for this I want to know how much stack size each thread use in worst case. To calculate this is I need to modify in kernel ? or current kernel have any support ? or is there a method I can get from smaps? Thanks ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: kernel build error
On Tue, Apr 2, 2013 at 1:19 PM, Kumar amit mehta gmate.a...@gmail.comwrote: On Tue, Apr 02, 2013 at 10:04:31AM +0700, Mulyadi Santosa wrote: Could you paste roughly 20-30 lines of boot messages when you hit the hung point? Kernel config alone usually can't help much I'm trying this on a Virtual Machine using VMware Player. When the VM boots up, it throws lots of messages on the console and then gets stuck. I'd like to know, how I can capture all those console logs till it hits the hung point. -Amit Never do such thing on VMWare, but I think Qemu-kvm is more convenient for such task. You just need to learn how to use its serial console.or just use its ncurses display so you simply copy and paste from your terminal program. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: cgroup.procs versus tasks (cgroups)
Hi, Thanks a lot Vlad. This explains it. - Does anybody know of a ps command (or a filter to ps command) which will display only multithreaded processes (list processes by TGID) ? (I know now about the option of displaying cgroup.procs , but is something parallel can be done with ps ? ) rgs, Kevin On Tue, Apr 2, 2013 at 10:40 AM, Vlad Dogaru ddv...@herebedragons.ro wrote: On Tue, Apr 02, 2013 at 05:54:56AM +0300, Kevin Wilson wrote: Hi? Any idea what is the difference cgroup.procs entry and tasks entry of cgroup sysfs? both represent pid lists. I ran: cat /sys/fs/cgroup/cpuset/cgroup.procs and cat /sys/fs/cgroup/cpuset/tasks and entries of cgroup.procs appear in tasks. However there are many more tasks than cgroup.procs: cat /sys/fs/cgroup/cpuset/cgroup.procs | wc -l 153 cat /sys/fs/cgroup/cpuset/tasks | wc -l 383 The difference you are seeing is because there are some multithreaded processes in your cpuset. In the cgroup.procs file, each such process apears only once (listed by its TGID). In the tasks file, each thread appears once (listed by its PID). Check the pidlist_array_load function in kernel/cgroup.c. procs is a list of (unique) TGIDs, while tasks is a list of PIDs. Hope this helps, Vlad ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Reading linux boot args
On Tue, 02 Apr 2013 12:12:09 +0900, manty kuma said: Is there any way i could read the reason for reboot. I want to read it so that i can get the reason that is stored. like 0xABADBABE is watchdog 0xCODEDEAD is panic. Etc.. Please suggest an alternative approach. See the 'pstore' persistent storage filesystem in fs/pstore. That lets you store more than just an int (you can even get it to stash your dmesg buffer). 'more fs/pstore/Kconfig' would be a good place to start. pgpRELPvKNH33.pgp Description: PGP signature ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: cgroup.procs versus tasks (cgroups)
On Tue, 02 Apr 2013 16:46:24 +0300, Kevin Wilson said: Hi, Thanks a lot Vlad. This explains it. - Does anybody know of a ps command (or a filter to ps command) which will display only multithreaded processes (list processes by TGID) ? (I know now about the option of displaying cgroup.procs , but is something parallel can be done with ps ? ) Have you tried 'ps -m' and friends? Though it doesn't do exactly what you wanted and *only* display multithreaded, you need to do some post-processing: $ ps max ... 928 ?- 0:00 /sbin/auditd -n - -Ssl 0:00 - - -Ssl 0:00 - 940 ?- 0:00 /sbin/audispd - -Ssl 0:00 - - -Ssl 0:00 - 951 ?- 0:00 /usr/sbin/abrtd -d -s - -Ss 0:00 - 960 ?- 0:00 /usr/bin/abrt-watch-log -F Backtrace /var/log/Xorg.0.log -- /usr/bin/abrt-dump-xorg -xD - -Ss 0:00 - If there's 2 or more '- -' after the process entry, it's multi=threaded. Note however that as far as the kernel is concerned, a single-threaded process is handled by the code as a multi-threaded that happens to have only one thread at the moment. In other words, thinking that single and multi threaded is different in some mystical way will probably end up causing trouble for you... pgpcu3BQco7sL.pgp Description: PGP signature ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Online migration of arbitrary filesystems, possible?
On Mon, 01 Apr 2013 17:50:43 -0300, Daniel Hilst said: Any reason you can't just 'rsync /source-fs /dest-fs'? because I can't use dest-fs while rsynching Sure you can. You just have to remember to pay attention to race conditions - if you create foo/bar.dat on the dest and then rsync wants to copy over a foo/bar.tar from the source, things will go poorly. However, if you wanted to write to the dest while doing your sync, you'll have that issue no matter *what* method you use to do it. Read operations: 1. See if data is already on dest fs, 2. If is then read data and bright back to caller (lets call this cold read) 3. If is not, then read file from source fs, put it on page cache, and change the backstorage of that page.. 3.1 So when this page get dirty or too old, it will be writed to You may want to look for 'overlayfs' and 'unionfs', which may provide you the function you need. (Note there's several different patchsets calling themselves 'unionfs'). pgpTPJOBUFmxB.pgp Description: PGP signature ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Reading linux boot args
Hi Valdis, Thansk for answer. I have made use of saved_command_linbe buffer that is available in all modules(extern present in linux/init.h) Best Regards, Manty On Wed, Apr 3, 2013 at 3:07 AM, valdis.kletni...@vt.edu wrote: On Tue, 02 Apr 2013 12:12:09 +0900, manty kuma said: Is there any way i could read the reason for reboot. I want to read it so that i can get the reason that is stored. like 0xABADBABE is watchdog 0xCODEDEAD is panic. Etc.. Please suggest an alternative approach. See the 'pstore' persistent storage filesystem in fs/pstore. That lets you store more than just an int (you can even get it to stash your dmesg buffer). 'more fs/pstore/Kconfig' would be a good place to start. ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: cgroup.procs versus tasks (cgroups)
Hi, BTW, for a given thread group with a specified TGID, you can view all the threads PIDs in that thread group thus: pstree -p TGID and: pstree TGID will give one line; It visually merges identical branches by putting them in square brackets and prefixing them with the repetition count. Regards, Rami Rosen http://ramirose.wix.com/ramirosen On Tue, Apr 2, 2013 at 9:14 PM, valdis.kletni...@vt.edu wrote: On Tue, 02 Apr 2013 16:46:24 +0300, Kevin Wilson said: Hi, Thanks a lot Vlad. This explains it. - Does anybody know of a ps command (or a filter to ps command) which will display only multithreaded processes (list processes by TGID) ? (I know now about the option of displaying cgroup.procs , but is something parallel can be done with ps ? ) Have you tried 'ps -m' and friends? Though it doesn't do exactly what you wanted and *only* display multithreaded, you need to do some post-processing: $ ps max ... 928 ?- 0:00 /sbin/auditd -n - -Ssl 0:00 - - -Ssl 0:00 - 940 ?- 0:00 /sbin/audispd - -Ssl 0:00 - - -Ssl 0:00 - 951 ?- 0:00 /usr/sbin/abrtd -d -s - -Ss 0:00 - 960 ?- 0:00 /usr/bin/abrt-watch-log -F Backtrace /var/log/Xorg.0.log -- /usr/bin/abrt-dump-xorg -xD - -Ss 0:00 - If there's 2 or more '- -' after the process entry, it's multi=threaded. Note however that as far as the kernel is concerned, a single-threaded process is handled by the code as a multi-threaded that happens to have only one thread at the moment. In other words, thinking that single and multi threaded is different in some mystical way will probably end up causing trouble for you... ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Method to calculate user space thread size
On Tue, Apr 2, 2013 at 7:55 PM, naveen yadav yad.nav...@gmail.com wrote: Dear All, I have very complex user space application contain more then 400 threads. I want to limit the stack size in user space, for this I want to know how much stack size each thread use in worst case. To calculate this is I need to modify in kernel ? or current kernel have any support ? or is there a method I can get from smaps? try to check /proc/pid/status on VmStk line. But IMHO that indicates the whole stack size (sum of all thread's stack size). BTW, sure what you want to do is safe? what if you miscalculate it? Certainly your application would crash some ways. So, maybe you need other workaround. If you need to reserve memory, perhaps what you need to do is doing malloc() wisely. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
