path: root/Documentation/kdump
diff options
authorZhou Wenjian <>2016-09-19 13:59:48 +0800
committerJonathan Corbet <>2016-09-20 18:02:49 -0600
commit3dfb4c1bf049535c82843fc4f9c37b635fe6494e (patch)
treea868621d32ec91ba59ae8e1c8a48d34c7de1d679 /Documentation/kdump
parentbe6c30956fa3dff2658c5ede40c80e461e2124ff (diff)
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 <>
Diffstat (limited to 'Documentation/kdump')
1 files changed, 2 insertions, 0 deletions
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