nr_cpus can help to save memory. So we should remind user of it. Signed-off-by: Zhou Wenjian <zhouwj-fnst@xxxxxxxxxxxxxx> Acked-by: Baoquan He <bhe@xxxxxxxxxx> Acked-by: Xunlei Pang <xpang@xxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
