File kdump-0.8.7-bsp.patch of Package kdump

Overview Repositories Revisions Requests Users Attributes Meta

File kdump-0.8.7-bsp.patch of Package kdump (Revision 4cfebe322c857e1db1ce73f04da27b82)

Currently displaying revision 4cfebe322c857e1db1ce73f04da27b82 , Show latest

From: Petr Tesarik <ptesarik@suse.cz>
Subject: Add disable_cpu_apicid for BSP to the commandline
References: bnc#861981
Patch-mainline: v0.8.8

Since the BSP cannot be brought up in the kdump environment, and there is no
reliable way of getting the APIC ID of an offlined CPU, it must be figured
out by the primary kernel and passed as a command-line option.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>

---
 NEWS                    |    2 ++
 init/rc.kdump.functions |   13 +++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,7 @@
 0.8.8
 -----
+  * Add disable_cpu_apicid parameter to the command line on x86 to prevent
+    bringing up the BSP in the kdump kernel.
   * Use nr_cpus instead of maxcpus with recent kernels.
 
 0.8.7
--- a/init/rc.kdump.functions
+++ b/init/rc.kdump.functions
@@ -103,9 +103,18 @@ function build_kdump_commandline()
                 < /proc/cmdline)
         # Use deadline for saving the memory footprint
         commandline="$commandline elevator=deadline sysrq=yes reset_devices"
-        case `uname -i` in
+        local arch=$(uname -i)
+        case "$arch" in
         i?86|x86_64|ia64)
-            commandline="$commandline irqpoll maxcpus=${KDUMP_CPUS:-1}"
+            local nr_cpus=$(cpus_param "$kdump_kernel")
+            commandline="$commandline irqpoll ${nr_cpus}=${KDUMP_CPUS:-1}"
+            if [ "$arch" = "x86_64" -o -z "${arch#i?86}" ]; then
+                local boot_apicid=$(
+                    awk -F':[ \t]' '/^initial apicid[ \t]*:/ {print $2; exit}' \
+                    /proc/cpuinfo)
+                test -n "$boot_apicid" &&
+                    commandline="$commandline disable_cpu_apicid=$boot_apicid"
+            fi
             ;;
 	s390*)
 	    commandline="$commandline zfcp.allow_lun_scan=0"

Places

File kdump-0.8.7-bsp.patch of Package kdump (Revision 4cfebe322c857e1db1ce73f04da27b82)

Places