[RESEND PATCH v2 7/9] x86, acpi, crash, kdump: Do reserve_crashkernel() after SRAT is parsed.

Tang Chen
2013-09-12T10:04:46Z

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.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
---
arch/x86/kernel/setup.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 7372be7..fa56a57 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1130,8 +1130,6 @@ 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();
@@ -1146,6 +1144,12 @@ void __init setup_arch(char **cmdline_p)
initmem_init();
memblock_find_dma_reserve();

+ /*
+ * Reserve memory for crash kernel after SRAT is parsed so that it
+ * won't consume hotpluggable memory.
+ */
+ reserve_crashkernel();
+
#ifdef CONFIG_KVM_GUEST
kvmclock_init();
#endif
--
1.7.1