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Commit 5959906e authored by Hidetoshi Seto's avatar Hidetoshi Seto Committed by Tony Luck
Browse files

[IA64] kdump: Try INIT regardless of 



kdump_on_init

CPUs should be frozen if possible, otherwise it might hinder kdump.
So if there are CPUs not respond to IPI, try INIT to stop them.

Signed-off-by: default avatarHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Haren Myneni <hbabu@us.ibm.com>
Cc: kexec@lists.infradead.org
Acked-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 1726b088

arch/ia64/kernel/crash.c

+21 −22
Original line number Diff line number Diff line
@@ -138,8 +138,10 @@ machine_crash_shutdown(struct pt_regs *pt) 
	 */

	kdump_smp_send_stop();

	/* not all cpu response to IPI, send INIT to freeze them */

	if (kdump_wait_cpu_freeze() && kdump_on_init) 	{

	if (kdump_wait_cpu_freeze()) {

		kdump_smp_send_init();

		/* wait again, don't go ahead if possible */

		kdump_wait_cpu_freeze();

	}

#endif

}
@@ -178,6 +180,19 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data) 
	struct ia64_mca_notify_die *nd;

	struct die_args *args = data;



	if (atomic_read(&kdump_in_progress)) {

		switch (val) {

		case DIE_INIT_MONARCH_LEAVE:

			if (!kdump_freeze_monarch)

				break;

			/* fall through */

		case DIE_INIT_SLAVE_LEAVE:

		case DIE_MCA_RENDZVOUS_LEAVE:

			unw_init_running(kdump_cpu_freeze, NULL);

			break;

		}

	}



	if (!kdump_on_init && !kdump_on_fatal_mca)

		return NOTIFY_DONE;
@@ -190,41 +205,25 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data) 
	}



	if (val != DIE_INIT_MONARCH_LEAVE &&

	    val != DIE_INIT_SLAVE_LEAVE &&

	    val != DIE_INIT_MONARCH_PROCESS &&

	    val != DIE_MCA_RENDZVOUS_LEAVE &&

	    val != DIE_MCA_MONARCH_LEAVE)

		return NOTIFY_DONE;



	nd = (struct ia64_mca_notify_die *)args->err;

	/* Reason code 1 means machine check rendezvous*/

	if ((val == DIE_INIT_MONARCH_LEAVE || val == DIE_INIT_SLAVE_LEAVE

	    || val == DIE_INIT_MONARCH_PROCESS) && nd->sos->rv_rc == 1)

		return NOTIFY_DONE;



	switch (val) {

	case DIE_INIT_MONARCH_PROCESS:

		if (kdump_on_init) {

		/* Reason code 1 means machine check rendezvous*/

		if (kdump_on_init && (nd->sos->rv_rc != 1)) {

			if (atomic_inc_return(&kdump_in_progress) != 1)

				kdump_freeze_monarch = 1;

			*(nd->monarch_cpu) = -1;

		}

		break;

	case DIE_INIT_MONARCH_LEAVE:

		if (kdump_on_init) {

			if (kdump_freeze_monarch)

				unw_init_running(kdump_cpu_freeze, NULL);

			else

		/* Reason code 1 means machine check rendezvous*/

		if (kdump_on_init && (nd->sos->rv_rc != 1))

			machine_kdump_on_init();

		}

		break;

	case DIE_INIT_SLAVE_LEAVE:

		if (atomic_read(&kdump_in_progress))

			unw_init_running(kdump_cpu_freeze, NULL);

		break;

	case DIE_MCA_RENDZVOUS_LEAVE:

		if (atomic_read(&kdump_in_progress))

			unw_init_running(kdump_cpu_freeze, NULL);

		break;

	case DIE_MCA_MONARCH_LEAVE:

		/* *(nd->data) indicate if MCA is recoverable */