--- kexec/kexec.8 | 8 ++++---- kexec/kexec.c | 4 +++- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/kexec/kexec.8 b/kexec/kexec.8 index 9e995fe..793e876 100644 --- a/kexec/kexec.8 +++ b/kexec/kexec.8 @@ -140,10 +140,10 @@ Open a help file for .BR kexec . .TP .B \-\-hotplug -Setup for kernel modification of the elfcorehdr. This option performs -the steps needed to support kernel updates to the elfcorehdr in the -presence of hot un/plug and/or on/offline events. This option only -useful for KEXEC_LOAD syscall. +Setup kexec segments such that kernel can safely update them on CPU/Memory +hot add/remove events. If this option is enabled, kernel does in-kernel +update of kexec segments on CPU/Memory hot add/remove events, thus avoiding +the need to reload kdump kernel. .TP .B \-i\ (\-\-no-checks) Fast reboot, no memory integrity checks. diff --git a/kexec/kexec.c b/kexec/kexec.c index 034cea6..9b7c34c 100644 --- a/kexec/kexec.c +++ b/kexec/kexec.c @@ -1093,7 +1093,9 @@ void usage(void) " back to the compatibility syscall when file based\n" " syscall is not supported or the kernel did not\n" " understand the image (default)\n" - " --hotplug Setup for kernel modification of elfcorehdr.\n" + " --hotplug Do in-kernel update of kexec segments on CPU/Memory\n" + " hot add/remove events, avoiding the need to reload\n" + " kdump kernel on online/offline events.\n" " -d, --debug Enable debugging to help spot a failure.\n" " -S, --status Return 1 if the type (by default crash) is loaded,\n" " 0 if not.\n" -- 2.45.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
