[PATCH v10 2/3] Documentation: kdump: remind user of nr_cpus

Baoquan He bhe at redhat.com
Sun Sep 18 21:01:04 PDT 2016

From: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>

nr_cpus can help to save memory. So we should remind user of it.

Signed-off-by: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
Acked-by: Baoquan He <bhe at redhat.com>
Acked-by: Xunlei Pang <xpang at redhat.com>
Signed-off-by: Baoquan He <bhe at redhat.com>
 Documentation/kdump/kdump.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 88ff63d..f7ef340 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

More information about the kexec mailing list