Is my rootfs correctly mounted?

stl st.lambert02 at gmail.com
Thu Aug 30 11:08:44 EDT 2012


And another question,
since the kernel is booting with initramfs support,
is it normal that it tries to run /init instead of bin/init or sbin/init

To be more precise, it runs this:

    if (ramdisk_execute_command) {
        run_init_process(ramdisk_execute_command);           <---this
        printk(KERN_WARNING "Failed to execute %s\n",
                ramdisk_execute_command);
    }

instead of this:

    run_init_process("/sbin/init");
    run_init_process("/etc/init");
    run_init_process("/bin/init");
    run_init_process("/bin/sh");

is it normal?

Thanks!

2012/8/30 stl <st.lambert02 at gmail.com>

> Thanks Rahul for your very quick answer.
> Glad to hear this.
> So, when does the message "VFS: Mounted root" appear?
> Maybe when using init ramdisk (initrd) support?
>
>
>
>
> 2012/8/30 Rahul Bedarkar <rpal143 at gmail.com>
>
>> yes root file system is mounted correctly. It is just it didn't find init.
>>
>> On Thu, Aug 30, 2012 at 8:10 PM, stl <st.lambert02 at gmail.com> wrote:
>> > Hello all,
>> > if I try to boot Linux 2.6.37 by supplying a configuration file to the
>> > kernel to create initramfs_data.cpio,
>> > (without any compression), is it normal that the kernel doesn't print
>> the
>> > well known message:
>> >
>> > VFS: Mounted root (<type> filesystem)
>> >
>> > even if the boot reaches the point where it tries to run init
>> executable?
>> > Does it mean that my rootfs is not correctly mounted?
>> >
>> > Here is the kernel output printed during the boot:
>> >
>> > <5>[    0.000000] Linux version 2.6.37+ (gcc version 4.6.3 20120816
>> (GCC) )
>> > #57 Thu Aug 30 12:00:00 CEST 2012
>> > [    0.000000] Built 1 zonelists in Zone order, mobility grouping off.
>> > Total pages: 2032
>> > [    0.000000] Kernel command line:
>> > [    0.000000] PID hash table entries: 32 (order: -5, 128 bytes)
>> > [    0.000000] Dentry cache hash table entries: 1024 (order: 0, 4096
>> bytes)
>> > [    0.000000] Inode-cache hash table entries: 1024 (order: 0, 4096
>> bytes)
>> > [    0.000000] Memory: 7656k/8196k available (1098k kernel code, 536k
>> > reserved, 2096117k data, 12k init)
>> > [    0.000000] SLUB: Genslabs=15, HWalign=16, Order=0-3, MinObjects=0,
>> > CPUs=1, Nodes=1
>> > [    0.000000] NR_IRQS:64
>> > [    0.000000] Timer start: timer interrupt every 10 ms
>> > [    0.000000] console [ttyS0] enabled
>> > [42949372.980000] Calibrating delay loop... 0.00 BogoMIPS (lpj=0)
>> > [42949373.180000] pid_max: default: 32768 minimum: 301
>> > [42949373.200000] Security Framework initialized
>> > [42949373.210000] Mount-cache hash table entries: 512
>> > [42949373.260000] khelper used greatest stack depth: 7548 bytes left
>> > [42949373.340000] kworker/u:0 used greatest stack depth: 7324 bytes left
>> > [42949373.500000] bio: create slab <bio-0> at 0
>> > [42949373.630000] kworker/u:0 used greatest stack depth: 7260 bytes left
>> > [42949374.630000] kworker/u:0 used greatest stack depth: 7180 bytes left
>> > [42949375.250000] VFS: Disk quotas dquot_6.5.2
>> > [42949375.270000] Dquot-cache hash table entries: 1024 (order 0, 4096
>> bytes)
>> > [42949375.390000] msgmni has been set to 16
>> > [42949375.420000] Block layer SCSI generic (bsg) driver version 0.4
>> loaded
>> > (major 253)
>> > [42949375.430000] io scheduler noop registered
>> > [42949375.440000] io scheduler deadline registered
>> > [42949375.460000] io scheduler cfq registered (default)
>> > [42949375.490000] Architecture Specific Serial Driver
>> > [42949375.500000] ttyS0 at MMIO 0x40001000 (irq = 5) is a arch_uart
>> > [42949375.700000] loop: module loaded
>> > [42949375.720000] mice: PS/2 mouse device common for all mice
>> > [42949375.780000] ------------[ cut here ]------------
>> > [42949375.800000] WARNING: at fs/proc/generic.c:589 .LBE364+0x0/0x2()
>> > [42949375.810000] proc_dir_entry '/proc/schedstat' already registered
>> > [42949375.820000] Modules linked in:
>> > [42949375.830000] ---[ end trace 31baa4bbf69a8bbc ]---
>> > [42949375.850000] Failed to execute /init
>> > [42949375.870000] Kernel panic - not syncing: No init found.  Try
>> passing
>> > init= option to kernel. See Linux Documentation/init.txt for guidance.
>> >
>> > In my opinion, it seems to be correct because the following message
>> doesn't
>> > appear:
>> >
>> > Warning: unable to open an initial console
>> >
>> > This means that the file /dev/console has been found, so that the
>> rootfs has
>> > been correctly mounted, isn't it?
>> >
>> >
>> > Thanks in advance for your help!
>> >
>> >
>> > _______________________________________________
>> > Kernelnewbies mailing list
>> > Kernelnewbies at kernelnewbies.org
>> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>> >
>>
>
>
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