From 3dfb4c1bf049535c82843fc4f9c37b635fe6494e Mon Sep 17 00:00:00 2001 From: Zhou Wenjian Date: Mon, 19 Sep 2016 13:59:48 +0800 Subject: Documentation: kdump: Remind user of nr_cpus nr_cpus can help to save memory. So we should remind user of it. Signed-off-by: Zhou Wenjian Acked-by: Baoquan He Acked-by: Xunlei Pang Signed-off-by: Jonathan Corbet --- Documentation/kdump/kdump.txt | 2 ++ 1 file changed, 2 insertions(+) (limited to 'Documentation/kdump') diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt index 88ff63d5fde3..f7ef34065d54 100644 --- a/Documentation/kdump/kdump.txt +++ b/Documentation/kdump/kdump.txt @@ -393,6 +393,8 @@ Notes on loading the dump-capture kernel: * We generally don' have to bring up a SMP kernel just to capture the dump. Hence generally it is useful either to build a UP dump-capture kernel or specify maxcpus=1 option while loading dump-capture kernel. + Note, though maxcpus always works, you had better replace it with + nr_cpus to save memory if supported by the current ARCH, such as x86. * For s390x there are two kdump modes: If a ELF header is specified with the elfcorehdr= kernel parameter, it is used by the kdump kernel as it -- cgit v1.2.3