linux-kernel - SOLVED [Was: backporting BFS to 2.6.27]

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Date:	Sun, 04 Oct 2009 23:54:48 -0500
From:	Jayson King <jaysonk@...global.net>
To:	kernel@...ivas.org, LKML <linux-kernel@...r.kernel.org>
Subject: SOLVED [Was: backporting BFS to 2.6.27]

Jayson King wrote:
> The kernel compiles, but it panics:
> 
> Kernel alive
> Kernel really alive
> PANIC: early exception 0e rip 10:ffffffff810ad10b error 0 cr2 18.
> 
> There's no stack trace but that address is in __kmalloc.

I enabled earlyprintk=vga in boot options and got a stack trace, which 
pointed to a kmalloc call in sched_init. It turns out that this is a 
no-no in 2.6.27 as page_alloc is not set up. Replacing the call with 
alloc_bootmem instead allows the kernel to boot.

I will wrap up a new patch and post it in a bit.

Jayson

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