kernel_optimize_test/arch/powerpc
Anton Blanchard b5416ca9f8 powerpc: Move kdump default base address to 64MB on 64bit
We are seeing boot fails on some System p machines when using the kdump
crashkernel= boot option. The default kdump base address is 32MB, so if we
reserve 256MB for kdump then we reserve all of the RMO except the first 32MB.

We really want kdump to reserve some memory in the RMO and most of it
elsewhere but that will require more significant changes. For now we can shift
the default base address to 64MB when CONFIG_PPC64 and CONFIG_RELOCATABLE are
set. This isn't quite correct since what we really care about is the kdump
kernel is relocatable, but we already make the assumption that base kernel
and kdump kernel have the same CONFIG_RELOCATABLE setting, eg:

#ifndef CONFIG_RELOCATABLE
        if (crashk_res.start != KDUMP_KERNELBASE)
                printk("Crash kernel location must be 0x%x\n",
                                KDUMP_KERNELBASE);
...

RTAS is instantiated towards the top of our RMO, so if we were to go any
higher we risk not having enough RMO memory for the kdump kernel on boxes
with a 128MB RMO.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-06-15 15:02:32 +10:00
..
boot Merge commit 'kumar/next' into next 2010-05-31 10:01:50 +10:00
configs Merge commit 'jwb/next' into next 2010-05-31 09:59:00 +10:00
include/asm powerpc: Move kdump default base address to 64MB on 64bit 2010-06-15 15:02:32 +10:00
kernel Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2010-06-11 14:15:44 -07:00
kvm KVM: powerpc: fix init/exit annotation 2010-06-09 18:39:09 +03:00
lib powerpc: Fix string library functions 2010-05-21 17:31:08 +10:00
math-emu
mm powerpc: Remove dead CONFIG_HIGHPTE 2010-06-15 15:02:32 +10:00
oprofile powerpc/oprofile: fix potential buffer overrun in op_model_cell.c 2010-06-07 11:18:56 +02:00
platforms powerpc/cell: Fix integer constant warning 2010-06-02 17:50:37 +10:00
sysdev of/powerpc: fix fsl_msi device node pointer 2010-06-02 22:26:42 -06:00
xmon powerpc: Mark some variables in the page fault path __read_mostly 2010-02-03 17:39:48 +11:00
Kconfig Merge commit 'kumar/next' into next 2010-05-31 10:01:50 +10:00
Kconfig.debug powerpc/cpumask: Add DEBUG_PER_CPU_MAPS option 2010-05-06 18:05:26 +10:00
Makefile kbuild: move -fno-dwarf2-cfi-asm to powerpc only 2010-02-05 23:21:18 +01:00
relocs_check.pl