[PATCH] powerpc: Trivial fix to set the proper timeout value for kdump

The panic CPU is waiting forever due to some large timeout value if some
CPU is not responding to an IPI.
This patch fixes the problem - the maximum waiting period will be
10 seconds and then the kdump boot will go ahead.

Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 8c21d37..778f22f 100644 (file)
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -134,8 +134,10 @@ static void crash_kexec_prepare_cpus(void)
         * the crash CPU will send an IPI and wait for other CPUs to
         * respond. If not, proceed the kexec boot even though we failed to
         * capture other CPU states.
+        * Delay of at least 10 seconds.
         */
-       msecs = 1000000;
+       printk(KERN_ALERT "Sending IPI to other cpus...\n");
+       msecs = 10000;
        while ((atomic_read(&waiting_for_crash_ipi) > 0) && (--msecs > 0)) {
                barrier();
                mdelay(1);