From 9336b0836bf789136b51caf9ddd49dcbf1726cf4 Mon Sep 17 00:00:00 2001 From: Keith Owens Date: Wed, 8 Feb 2006 13:40:59 +1100 Subject: [IA64] MCA: print messages in MCA handler Print a message identifying the monarch MCA handler. Print a summary of the status of the slave MCA cpus. Signed-off-by: Keith Owens Signed-off-by: Tony Luck --- arch/ia64/kernel/mca.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index ee7eec9ee576..23d54413c006 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -908,7 +908,7 @@ no_mod: static void ia64_wait_for_slaves(int monarch) { - int c, wait = 0; + int c, wait = 0, missing = 0; for_each_online_cpu(c) { if (c == monarch) continue; @@ -919,15 +919,32 @@ ia64_wait_for_slaves(int monarch) } } if (!wait) - return; + goto all_in; for_each_online_cpu(c) { if (c == monarch) continue; if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) { udelay(5*1000000); /* wait 5 seconds for slaves (arbitrary) */ + if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) + missing = 1; break; } } + if (!missing) + goto all_in; + printk(KERN_INFO "OS MCA slave did not rendezvous on cpu"); + for_each_online_cpu(c) { + if (c == monarch) + continue; + if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) + printk(" %d", c); + } + printk("\n"); + return; + +all_in: + printk(KERN_INFO "All OS MCA slaves have reached rendezvous\n"); + return; } /* @@ -953,6 +970,10 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw, task_t *previous_current; oops_in_progress = 1; /* FIXME: make printk NMI/MCA/INIT safe */ + console_loglevel = 15; /* make sure printks make it to console */ + printk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d monarch=%ld\n", + sos->proc_state_param, cpu, sos->monarch); + previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA"); monarch_cpu = cpu; if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, 0, 0, 0) -- cgit v1.2.2 From e9ac054daaecf8a11f2113b60f2b6ce381c4f131 Mon Sep 17 00:00:00 2001 From: Keith Owens Date: Wed, 8 Feb 2006 13:41:04 +1100 Subject: [IA64] MCA: update MCA comm field for user space tasks Update the comm field on the MCA handler for user tasks as well as for verified kernel tasks. This helps to identify the task that was running when the MCA occurred. Signed-off-by: Keith Owens Signed-off-by: Tony Luck --- arch/ia64/kernel/mca.c | 52 +++++++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 20 deletions(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 23d54413c006..4f8464ead634 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -630,6 +630,32 @@ copy_reg(const u64 *fr, u64 fnat, u64 *tr, u64 *tnat) *tnat |= (nat << tslot); } +/* Change the comm field on the MCA/INT task to include the pid that + * was interrupted, it makes for easier debugging. If that pid was 0 + * (swapper or nested MCA/INIT) then use the start of the previous comm + * field suffixed with its cpu. + */ + +static void +ia64_mca_modify_comm(const task_t *previous_current) +{ + char *p, comm[sizeof(current->comm)]; + if (previous_current->pid) + snprintf(comm, sizeof(comm), "%s %d", + current->comm, previous_current->pid); + else { + int l; + if ((p = strchr(previous_current->comm, ' '))) + l = p - previous_current->comm; + else + l = strlen(previous_current->comm); + snprintf(comm, sizeof(comm), "%s %*s %d", + current->comm, l, previous_current->comm, + task_thread_info(previous_current)->cpu); + } + memcpy(current->comm, comm, sizeof(current->comm)); +} + /* On entry to this routine, we are running on the per cpu stack, see * mca_asm.h. The original stack has not been touched by this event. Some of * the original stack's registers will be in the RBS on this stack. This stack @@ -648,7 +674,7 @@ ia64_mca_modify_original_stack(struct pt_regs *regs, struct ia64_sal_os_state *sos, const char *type) { - char *p, comm[sizeof(current->comm)]; + char *p; ia64_va va; extern char ia64_leave_kernel[]; /* Need asm address, not function descriptor */ const pal_min_state_area_t *ms = sos->pal_min_state; @@ -721,6 +747,10 @@ ia64_mca_modify_original_stack(struct pt_regs *regs, /* Verify the previous stack state before we change it */ if (user_mode(regs)) { msg = "occurred in user space"; + /* previous_current is guaranteed to be valid when the task was + * in user space, so ... + */ + ia64_mca_modify_comm(previous_current); goto no_mod; } if (r13 != sos->prev_IA64_KR_CURRENT) { @@ -750,25 +780,7 @@ ia64_mca_modify_original_stack(struct pt_regs *regs, goto no_mod; } - /* Change the comm field on the MCA/INT task to include the pid that - * was interrupted, it makes for easier debugging. If that pid was 0 - * (swapper or nested MCA/INIT) then use the start of the previous comm - * field suffixed with its cpu. - */ - if (previous_current->pid) - snprintf(comm, sizeof(comm), "%s %d", - current->comm, previous_current->pid); - else { - int l; - if ((p = strchr(previous_current->comm, ' '))) - l = p - previous_current->comm; - else - l = strlen(previous_current->comm); - snprintf(comm, sizeof(comm), "%s %*s %d", - current->comm, l, previous_current->comm, - task_thread_info(previous_current)->cpu); - } - memcpy(current->comm, comm, sizeof(current->comm)); + ia64_mca_modify_comm(previous_current); /* Make the original task look blocked. First stack a struct pt_regs, * describing the state at the time of interrupt. mca_asm.S built a -- cgit v1.2.2 From 2730c9295a9a797a22b800d3befd6a64fdc56b02 Mon Sep 17 00:00:00 2001 From: Keith Owens Date: Wed, 8 Feb 2006 13:41:10 +1100 Subject: [IA64] MCA: remove obsolete ifdef No platform in the community tree uses PLATFORM_MCA_HANDLERS, remove the references. Signed-off-by: Keith Owens Signed-off-by: Tony Luck --- arch/ia64/kernel/mca.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'arch/ia64/kernel') diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 4f8464ead634..909fed2c2499 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -281,11 +281,6 @@ ia64_mca_log_sal_error_record(int sal_info_type) ia64_sal_clear_state_info(sal_info_type); } -/* - * platform dependent error handling - */ -#ifndef PLATFORM_MCA_HANDLERS - #ifdef CONFIG_ACPI int cpe_vector = -1; @@ -377,8 +372,6 @@ ia64_mca_register_cpev (int cpev) } #endif /* CONFIG_ACPI */ -#endif /* PLATFORM_MCA_HANDLERS */ - /* * ia64_mca_cmc_vector_setup * -- cgit v1.2.2