From 43ed3baf623410b3fa6ca14a9d3f6deca3493c56 Mon Sep 17 00:00:00 2001 From: Hidetoshi Seto Date: Tue, 26 Sep 2006 14:44:37 -0700 Subject: [IA64] printing support for MCA/INIT Printing message to console from MCA/INIT handler is useful, however doing oops_in_progress = 1 in them exactly makes something in kernel wrong. Especially it sounds ugly if system goes wrong after returning from recoverable MCA. This patch adds ia64_mca_printk() function that collects messages into temporary-not-so-large message buffer during in MCA/INIT environment and print them out later, after returning to normal context or when handlers determine to down the system. Also this print function is exported for use in extensional MCA handler. It would be useful to describe detail about recovery. NOTE: I don't think it is sane thing if temporary message buffer is enlarged enough to hold whole stack dumps from INIT, so buffering is disabled during stack dump from INIT-monarch (= default_monarch_init_process). please fix it in future. Signed-off-by: Hidetoshi Seto Acked-by: Russ Anderson Signed-off-by: Tony Luck --- arch/ia64/kernel/salinfo.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/ia64/kernel/salinfo.c') diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c index 9065f0f01ba3..e63b8ca5344a 100644 --- a/arch/ia64/kernel/salinfo.c +++ b/arch/ia64/kernel/salinfo.c @@ -266,6 +266,7 @@ salinfo_log_wakeup(int type, u8 *buffer, u64 size, int irqsafe) /* Check for outstanding MCA/INIT records every minute (arbitrary) */ #define SALINFO_TIMER_DELAY (60*HZ) static struct timer_list salinfo_timer; +extern void ia64_mlogbuf_dump(void); static void salinfo_timeout_check(struct salinfo_data *data) @@ -283,6 +284,7 @@ salinfo_timeout_check(struct salinfo_data *data) static void salinfo_timeout (unsigned long arg) { + ia64_mlogbuf_dump(); salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_MCA); salinfo_timeout_check(salinfo_data + SAL_INFO_TYPE_INIT); salinfo_timer.expires = jiffies + SALINFO_TIMER_DELAY; @@ -332,6 +334,8 @@ retry: if (cpu == -1) goto retry; + ia64_mlogbuf_dump(); + /* for next read, start checking at next CPU */ data->cpu_check = cpu; if (++data->cpu_check == NR_CPUS) -- cgit v1.2.3