From 687da8fce1682c9f1e87530e731189863c588265 Mon Sep 17 00:00:00 2001 From: Sukadev Bhattiprolu Date: Mon, 27 Mar 2017 19:43:14 -0400 Subject: [PATCH] powerpc/prom: Increase minimum RMA size to 512MB When booting very large systems with a large initrd, we run out of space early in boot for either RTAS or the flattened device tree (FDT). Boot fails with messages like: Could not allocate memory for RTAS or No memory for flatten_device_tree (no room) Increasing the minimum RMA size to 512MB fixes the problem. This should not have an impact on smaller LPARs (with 256MB memory), as the firmware will cap the RMA to the memory assigned to the LPAR. Fix is based on input/discussions with Michael Ellerman. Thanks to Praveen K. Pandey for testing on a large system. Reported-by: Praveen K. Pandey Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/prom_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 1c1b44ec7642..dd8a04f3053a 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -815,7 +815,7 @@ struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = { .virt_base = cpu_to_be32(0xffffffff), .virt_size = cpu_to_be32(0xffffffff), .load_base = cpu_to_be32(0xffffffff), - .min_rma = cpu_to_be32(256), /* 256MB min RMA */ + .min_rma = cpu_to_be32(512), /* 512MB min RMA */ .min_load = cpu_to_be32(0xffffffff), /* full client load */ .min_rma_percent = 0, /* min RMA percentage of total RAM */ .max_pft_size = 48, /* max log_2(hash table size) */ -- 2.20.1