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    SubjectRe: [PATCH] Configurable delay before mounting root device
    Andrew Morton wrote:
    > You owe me an update to Documentation/kernel-parameters.txt ;)
    Adds a boot parameter which can be used to specify a delay (in seconds) before
    the root device is decoded/discovered/mounted.

    Example usage for 10 second delay:

    rootdelay=10

    Useful for usb-storage devices which no longer make their partitions
    immediately available, and for other storage devices which require some
    "spin-up" time.

    Signed-off-by: Daniel Drake <dsd@gentoo.org>

    --- linux-2.6.10/init/do_mounts.c.orig 2005-01-20 20:37:01.000000000 +0000
    +++ linux-2.6.10/init/do_mounts.c 2005-01-20 20:44:47.190899080 +0000
    @@ -6,6 +6,7 @@
    #include <linux/suspend.h>
    #include <linux/root_dev.h>
    #include <linux/security.h>
    +#include <linux/delay.h>

    #include <linux/nfs_fs.h>
    #include <linux/nfs_fs_sb.h>
    @@ -228,8 +229,16 @@
    return 1;
    }

    +static unsigned int __initdata root_delay;
    +static int __init root_delay_setup(char *str)
    +{
    + root_delay = simple_strtoul(str, NULL, 0);
    + return 1;
    +}
    +
    __setup("rootflags=", root_data_setup);
    __setup("rootfstype=", fs_names_setup);
    +__setup("rootdelay=", root_delay_setup);

    static void __init get_fs_names(char *page)
    {
    @@ -387,6 +396,12 @@

    mount_devfs();

    + if (root_delay) {
    + printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
    + root_delay);
    + ssleep(root_delay);
    + }
    +
    md_run_setup();

    if (saved_root_name[0]) {
    --- linux-2.6.10/Documentation/kernel-parameters.txt.orig 2005-01-21 17:18:20.000000000 +0000
    +++ linux-2.6.10/Documentation/kernel-parameters.txt 2005-01-21 17:22:29.000000000 +0000
    @@ -1072,6 +1072,9 @@ running once the system is up.

    root= [KNL] Root filesystem

    + rootdelay= [KNL] Delay (in seconds) to pause before attempting to
    + mount the root filesystem
    +
    rootflags= [KNL] Set root filesystem mount option string

    rootfstype= [KNL] Set root filesystem type
    \
     
     \ /
      Last update: 2005-03-22 14:09    [W:3.738 / U:0.124 seconds]
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