[PATCH v8 1/2] Documentation: kdump: remind user of nr_cpus

From	Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com>
Newsgroups	linux.kernel
Subject	[PATCH v8 1/2] Documentation: kdump: remind user of nr_cpus
Date	2016-08-18 04:40 +0200
Message-ID	<s7lpn-1Lg-7@gated-at.bofh.it> (permalink)
References	<s7lpn-1Lg-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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

Signed-off-by: Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Xunlei Pang <xpang@redhat.com>
---
 Documentation/kdump/kdump.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 88ff63d..e8da1d5 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -390,9 +390,11 @@ Notes on loading the dump-capture kernel:
 * Boot parameter "1" boots the dump-capture kernel into single-user
   mode without networking. If you want networking, use "3".
 
-* We generally don' have to bring up a SMP kernel just to capture the
+* We generally don' have to bring up an 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 should replace it by 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
-- 
1.8.3.1

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[PATCH v8 1/2] Documentation: kdump: remind user of nr_cpus Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com> - 2016-08-18 04:40 +0200

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