Kernel 64bit

[Mandeep Sandhu]

On Thu, May 23, 2013 at 3:38 PM, Giridhara RP (grp) <grp at cisco.com> wrote:

> I did not see any file (vmlinuz-<version>.x86_64) under /boot. I was only
> looking at bzImage found under <arch>/boot/ . Am I missing something?
>

Can you look at the 'running' kernel's config to see if it's indeed the one
you compiled (provided you enabled support for it during building - see
/proc/config.gz)? Eg something like 'CONFIG_X86_64=y' is set.

Is the machine you're building on 64-bit or 32-bit? I hope you used a 64bit
compiler for building your kernel.

HTH,
-mandeep


>
>
> [root at grpRHEL2 linux-2.6.32.60]# pwd
> /root/lin_2/linux-2.6.32.60
> [root at grpRHEL2 linux-2.6.32.60]# find . | grep -i vmlinuz
> [root at grpRHEL2 linux-2.6.32.60]#
> [root at grpRHEL2 linux-2.6.32.60]#
> [root at grpRHEL2 linux-2.6.32.60]# file vmlinux
> vmlinux: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically
> linked, not stripped
>
> [root at grpRHEL2 linux-2.6.32.60]# file vmlinux.o
> vmlinux.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not
> stripped
>
> [root at grpRHEL2 linux-2.6.32.60]# file arch/x86/boot/bzImage
> arch/x86/boot/bzImage: Linux kernel x86 boot executable bzImage, version
> 2.6.32.60 (root at grpRHEL2) #1 SM, RO-rootFS, swap_dev 0x3, Normal VGA
> [root at grpRHEL2 linux-2.6.32.60]# file arch/x86_64/boot/bzImage
> arch/x86_64/boot/bzImage: symbolic link to `../../x86/boot/bzImage'
>
> -----Original Message-----
> From: amit mehta [mailto:gmate.amit at gmail.com]
> Sent: Thursday, May 23, 2013 3:31 PM
> To: Giridhara RP (grp)
> Cc: kernelnewbies at kernelnewbies.org
> Subject: Re: Kernel 64bit
>
> On Thu, May 23, 2013 at 2:45 PM, Giridhara RP (grp) <grp at cisco.com> wrote:
> >  Looks like I copied wrong output in my previous email. Here is the
> output. Also, what should I do with 'grub'?
> >
> >  5. After boot 'uname -a' , shows this.
> >  Linux 2.6.32-60 #1 SMP Mon Mar 25 16:20:30 IST 2013 i686 GNU/Linux
>
> Generally, After building a new kernel, I issue 'update-grub' command on
> my ubuntu box to add proper entries for the newly built kernel in the grub
> configuration file, but I think 'make install' will take care of this as
> well. However, as you've confirmed that you've successfully booted from the
> newly built kernel, which is still being reported as a 32 bit kernel,
> therefore we can safely reject the case of incorrect and or missing grub
> entry.
>
> Do you see compressed x86_64 bit kernel image(vmlinuz-<version>.x86_64)
> under /boot ?
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