On 22/05/24 6:43 pm, Sourabh Jain wrote:
Update the man page and --help option to make the description of the
--hotplug option easier to understand.
Cc: Aditya Gupta <adit...@linux.ibm.com>
Cc: Baoquan He <b...@redhat.com>
Cc: Coiby Xu <c...@redhat.com>
Cc: Hari Bathini <hbath...@linux.ibm.com>
Cc: Mahesh Salgaonkar <mah...@linux.ibm.com>
Signed-off-by: Sourabh Jain <sourabhj...@linux.ibm.com>
---
kexec/kexec.8 | 8 ++++----
kexec/kexec.c | 3 ++-
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/kexec/kexec.8 b/kexec/kexec.8
index 9e995fe..7dddae9 100644
--- a/kexec/kexec.8
+++ b/kexec/kexec.8
@@ -140,10 +140,10 @@ Open a help file for
.BR kexec .
.TP
.B \-\-hotplug
Can we have the description changed like:
-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.
+Helps avoid kdump kernel reload on CPU/Memory hotplug or on/offline events.
+If this option is enabled, the kexec segments will be set up in a way that
+the kernel can safely update them on CPU/memory hotplug and/or on/offline
+events. This option is only useful for the 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.
Helps avoid 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..2b06438 100644
--- a/kexec/kexec.c
+++ b/kexec/kexec.c
@@ -1093,7 +1093,8 @@ 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 Helps avoid kdump kernel reload on CPU/Memory
hotplug\n"
+ " or on/offline events.\n"
"Do in-kernel update of kexec segments on CPU/Memory hot add/remove
events. This avoids the need to reload kdump kernel."
- Hari
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