From: Baoquan He <bhe@redhat.com>
To: corbet@lwn.net, akpm@linux-foundation.org
Cc: Baoquan He <bhe@redhat.com>,
linux-doc@vger.kernel.org, kexec@lists.infradead.org,
Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com>,
xlpang@redhat.com, linux-kernel@vger.kernel.org,
dyoung@redhat.com
Subject: [PATCH v10 2/3] Documentation: kdump: remind user of nr_cpus
Date: Mon, 19 Sep 2016 12:01:04 +0800 [thread overview]
Message-ID: <1474257665-8838-3-git-send-email-bhe@redhat.com> (raw)
In-Reply-To: <1474257665-8838-1-git-send-email-bhe@redhat.com>
From: Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com>
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>
Signed-off-by: Baoquan He <bhe@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
--
2.5.5
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next prev parent reply other threads:[~2016-09-19 4:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 4:01 [PATCH v10 0/3] Documentation: add description of enable multi-cpus support for kdump Baoquan He
2016-09-19 4:01 ` [PATCH v10 1/3] docs: kernel-parameter : Improve the description of nr_cpus and maxcpus Baoquan He
2016-09-19 4:01 ` Baoquan He [this message]
2016-09-19 4:01 ` [PATCH v10 3/3] Documentation: kdump: add description of enable multi-cpus support Baoquan He
2016-09-19 5:52 ` Baoquan He
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