hi,
I compiled the new kernel linux-2.6.5,but when i want to boot the new
kernel is halting with this messge:
mountig root file system
mount error 19 mounting ex3
pivootrootivot_root(/sysroot,/sysroot,/initrd) failed:2
freeing unused kernel memory:124k freed
kernel panic:No init found.Try passing init=option to kernel
the grub menu.lst is as:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,4)
# kernel /vmlinuz-version ro root=/dev/hda10
# initrd /initrd-version.img
#boot=/dev/hda5
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
title Red Hat 9 (2.4.20-8)
root (hd0,4)
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/ devfs=mount
initrd /initrd-2.4.20-8.img
title DOS
rootnoverify (hd0,0)
chainloader +1

title new linuxs
root (hd0,4)
kernel /vmlinuz-2.6 ro root=LABEL=/ devfs=mount
initrd /initrd-2.6.5.img
plz help me.

When you compiled the kernel, did you include initrd - filesystem there?
And after that, did you use mkinitrd to create new .img - file?

If not, then compile it with that, and do a "man mkinitrd" to find out more...