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Message-ID: <1471489907-27737-2-git-send-email-zhouwj-fnst@cn.fujitsu.com> Date: Thu, 18 Aug 2016 11:11:46 +0800 From: Zhou Wenjian <zhouwj-fnst@...fujitsu.com> To: <linux-kernel@...r.kernel.org> CC: <akpm@...ux-foundation.org>, <dyoung@...hat.com>, <bhe@...hat.com>, <vgoyal@...hat.com>, <corbet@....net>, <kexec@...ts.infradead.org>, <linux-doc@...r.kernel.org>, <xlpang@...hat.com>, <joe@...ches.com> Subject: [PATCH v9 1/2] 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 <zhouwj-fnst@...fujitsu.com> Acked-by: Baoquan He <bhe@...hat.com> Acked-by: Xunlei Pang <xpang@...hat.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..d900080 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 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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