On 14/06/24 12:37 am, 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>
Cc: Simon Horman <ho...@kernel.org>
Minor nits below...
Otherwise, looks good.
Acked-by: Hari Bathini <hbath...@linux.ibm.com>
Signed-off-by: Sourabh Jain <sourabhj...@linux.ibm.com>
---
Changelog:
Since v1:
- Updated --hotplug option description
---
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..92fa3d5 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. Helps avoid
+the need to reload kdump kernel.
s/events. Helps avoid the need/events, thus avoiding the need/
.TP
.B \-i\ (\-\-no-checks)
Fast reboot, no memory integrity checks.
diff --git a/kexec/kexec.c b/kexec/kexec.c
index 034cea6..db8e2b3 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. This avoids the need to
reload\n"
s/events. This avoids/events, avoiding/
+ " kdump kernel or on/offline events.\n"
s/kernel or on/kernel on online/
" -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"
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