[PATCH] ppc64: increase TREEWORDS value in ppc64
horms at verge.net.au
Fri Sep 10 11:43:07 EST 2010
[ Repost with correct kexec ML address ]
[ CCed linuxppc-dev ]
On Thu, Sep 09, 2010 at 04:27:11PM -0400, Neil Horman wrote:
> Got a segfault recently on ppc64 kexec with a system with 256Gb of ram.
> Tracked it back to running over the end of the device tree buffer that we have
> allocated. I can't find any docs on how big the device tree can legally be, so
> for now I figure just upping its size is sufficient. Confirmed that this fixed
> the segfault.
Thanks Neil, though it would be nice to know what the limit actually is.
I'll hold off on applying this for a few days to see of the PPC people
have any comments on that.
> Signed-off-by: Neil Horman <nhorman at tuxdriver.com>
> fs2dt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> diff --git a/kexec/arch/ppc/fs2dt.c b/kexec/arch/ppc/fs2dt.c
> index 238a3f2..2f0f937 100644
> --- a/kexec/arch/ppc/fs2dt.c
> +++ b/kexec/arch/ppc/fs2dt.c
> @@ -33,7 +33,7 @@
> #define MAXPATH 1024 /* max path name length */
> #define NAMESPACE 16384 /* max bytes for property names */
> -#define TREEWORDS 65536 /* max 32 bit words for properties */
> +#define TREEWORDS 131070 /* max 32 bit words for properties */
> #define MEMRESERVE 256 /* max number of reserved memory blks */
> #define MAX_MEMORY_RANGES 1024
> #define COMMAND_LINE_SIZE 512 /* from kernel */
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