Re: 1 GB lowmem

Kumar Gala wrote:

quoted

On May 21, 2008, at 3:55 PM, Rune Torgersen wrote:

quoted

Argh... Found it. Had to set CONFIG_TASK_SIZE to 0x80000000. Now it
works in both vaniulla an d RT kernel.

We should really add some sanity check on CONFIG_TASK_SIZE vs
KERNEL_START.

Something like this?
Wording sould probablyy be a bit different/cleare.

diff --git a/include/asm-powerpc/processor.h

b/include/asm-powerpc/processor.h
index fd98ca9..72e0e3f 100644

--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h

@@ -81,6 +81,10 @@ extern struct task_struct *last_task_used_altivec;

extern struct task_struct *last_task_used_spe;

#ifdef CONFIG_PPC32
+
+#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
+#error User TASK_SIZE overlaps with KERNEL_START address
+#endif
#define TASK_SIZE      (CONFIG_TASK_SIZE)

/* This decides where the kernel will search for a free chunk of vm