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| author | Jay Lan <jlan@sgi.com> | 2007-04-03 17:53:42 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-05-14 15:55:39 -0700 |
| commit | 311f594dec9b0c8693ec7df75b82c251b6b0e7c2 (patch) | |
| tree | 1cd73b7df869c0a8c274e16b818454bed532d052 /arch | |
| parent | ae67e498a54259364f7211e10d9834575b340b21 (diff) | |
| download | linux-stable-311f594dec9b0c8693ec7df75b82c251b6b0e7c2.tar.gz linux-stable-311f594dec9b0c8693ec7df75b82c251b6b0e7c2.tar.bz2 linux-stable-311f594dec9b0c8693ec7df75b82c251b6b0e7c2.zip | |
[IA64] kdump on INIT needs multi-nodes sync-up (v.2)
The current implementation of kdump on INIT events would enter
kdump processing on DIE_INIT_MONARCH_ENTER and DIE_INIT_SLAVE_ENTER
events. Thus, the monarch cpu would go ahead and boot up the kdump
On SN shub2 systems, this out-of-sync situation causes some slave
cpus on different nodes to enter POD.
This patch moves kdump entry points to DIE_INIT_MONARCH_LEAVE and
DIE_INIT_SLAVE_LEAVE. It also sets kdump_in_progress variable in
the DIE_INIT_MONARCH_PROCESS event to not dump all active stack
traces to the console in the case of kdump.
I have tested this patch on an SN machine and a HP RX2600.
Signed-off-by: Jay Lan <jlan@sgi.com>
Acked-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/kernel/crash.c | 22 | ||||
| -rw-r--r-- | arch/ia64/kernel/mca.c | 4 |
2 files changed, 19 insertions, 7 deletions
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c index e80c82ce6b76..1d64ef478dde 100644 --- a/arch/ia64/kernel/crash.c +++ b/arch/ia64/kernel/crash.c @@ -156,24 +156,30 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data) if (!kdump_on_init) return NOTIFY_DONE; - if (val != DIE_INIT_MONARCH_ENTER && - val != DIE_INIT_SLAVE_ENTER && + 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_ENTER || val == DIE_INIT_SLAVE_ENTER) && - nd->sos->rv_rc == 1) + 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_ENTER: + case DIE_INIT_MONARCH_PROCESS: + atomic_set(&kdump_in_progress, 1); + *(nd->monarch_cpu) = -1; + break; + case DIE_INIT_MONARCH_LEAVE: machine_kdump_on_init(); break; - case DIE_INIT_SLAVE_ENTER: - unw_init_running(kdump_cpu_freeze, NULL); + 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)) @@ -215,8 +221,10 @@ static ctl_table sys_table[] = { static int machine_crash_setup(void) { + /* be notified before default_monarch_init_process */ static struct notifier_block kdump_init_notifier_nb = { .notifier_call = kdump_init_notifier, + .priority = 1, }; int ret; if((ret = register_die_notifier(&kdump_init_notifier_nb)) != 0) diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 26814de6c29a..93e82e4d99d6 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -1477,6 +1477,10 @@ default_monarch_init_process(struct notifier_block *self, unsigned long val, voi struct task_struct *g, *t; if (val != DIE_INIT_MONARCH_PROCESS) return NOTIFY_DONE; +#ifdef CONFIG_KEXEC + if (atomic_read(&kdump_in_progress)) + return NOTIFY_DONE; +#endif /* * FIXME: mlogbuf will brim over with INIT stack dumps. |