[part1,v6,5/6] x86, acpi, crash, kdump: Do reserve_crashkernel() after SRAT is parsed.

Commit Message

Zhang Yanfei Oct. 4, 2013, 2:01 a.m. UTC

From: Tang Chen <[e-mail]>

Memory reserved for crashkernel could be large. So we should not allocate
this memory bottom up from the end of kernel image.

When SRAT is parsed, we will be able to know whihc memory is hotpluggable,
and we can avoid allocating this memory for the kernel. So reorder
reserve_crashkernel() after SRAT is parsed.

Acked-by: Tejun Heo <[e-mail]>
Signed-off-by: Tang Chen <[e-mail]>
Signed-off-by: Zhang Yanfei <[e-mail]>
---
 arch/x86/kernel/setup.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f0de629..b5e350d 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1120,8 +1120,6 @@  void __init setup_arch(char **cmdline_p)
 	acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start);
 #endif
 
-	reserve_crashkernel();
-
 	vsmp_init();
 
 	io_delay_init();
@@ -1134,6 +1132,13 @@  void __init setup_arch(char **cmdline_p)
 	early_acpi_boot_init();
 
 	initmem_init();
+
+	/*
+	 * Reserve memory for crash kernel after SRAT is parsed so that it
+	 * won't consume hotpluggable memory.
+	 */
+	reserve_crashkernel();
+
 	memblock_find_dma_reserve();
 
 #ifdef CONFIG_KVM_GUEST