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| author | Zhou Wenjian <zhouwj-fnst@cn.fujitsu.com> | 2016-09-19 07:59:48 +0200 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2016-09-21 02:02:49 +0200 |
| commit | 3dfb4c1bf049535c82843fc4f9c37b635fe6494e (patch) | |
| tree | a868621d32ec91ba59ae8e1c8a48d34c7de1d679 /Documentation/kdump | |
| parent | Documentation: DMA-API-HOWTO: Fix a typo (diff) | |
| download | linux-3dfb4c1bf049535c82843fc4f9c37b635fe6494e.tar.xz linux-3dfb4c1bf049535c82843fc4f9c37b635fe6494e.zip | |
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@cn.fujitsu.com>
Acked-by: Baoquan He <bhe@redhat.com>
Acked-by: Xunlei Pang <xpang@redhat.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/kdump')
| -rw-r--r-- | Documentation/kdump/kdump.txt | 2 |
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 |