lkml.org 
[lkml]   [2003]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: mem=16MB laptop testing
    Russell King <rmk+lkml@arm.linux.org.uk> wrote:
    >
    > On Tue, Oct 14, 2003 at 05:10:31AM -0700, Andrew Morton wrote:
    > > Russell King <rmk+lkml@arm.linux.org.uk> wrote:
    > > > On Tue, Oct 14, 2003 at 04:56:14AM -0700, Andrew Morton wrote:
    > > > > I guess not mounting /sys doesn't help here. It would be nice. Maybe with
    > > > > a CONFIG_I_WILL_NEVER_MOUNT_SYSFS we could avoid all those allocations.
    > > >
    > > > I believe sysfs is required for mounting the root filesystem - see
    > > > name_to_dev_t in init/do_mounts.c.
    > >
    > > OK. But it looks like if /sys is empty and you provide "root=03:02" then
    > > things will still work. It's a matter of trying it...
    >
    > Uhh?
    >
    > dev_t name_to_dev_t(char *name)
    > {
    > dev_t res = 0;
    >
    > sys_mkdir("/sys", 0700);
    > if (sys_mount("sysfs", "/sys", "sysfs", 0, NULL) < 0)
    > goto out;
    >
    > ...
    >
    > out:
    > sys_rmdir("/sys");
    > return res;
    > }
    >
    > If sysfs can't be mounted, then it looks like we can't even decode a
    > numeric major:minor root device specification.

    Well I was proposing that sysfs be present and mountable, but empty. ie:
    make sysfs_create() a no-op. Something like that. Additional touchups may
    be needed of course.
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:49    [W:0.041 / U:1.828 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site