[PATCH v10 RESEND 2/3] Documentation: kdump: Remind user of nr_cpus
bhe at redhat.com
Sun Sep 18 22:59:48 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>
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
@@ -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
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