From 5588340d46a484da53bbce8136184d9c7fbc259c Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Wed, 13 Jul 2011 13:14:15 +0800 Subject: [PATCH] ACPI, APEI, GHES, Do not ratelimit fatal error printk before panic printk is used by GHES to report hardware errors. Normally, the printk will be ratelimited to avoid too many hardware error reports in kernel log. Because there may be thousands or even millions of corrected hardware errors during system running. That is different for fatal hardware error, because system will go panic as soon as possible, there will be no more than several error records. And these error records are valuable for system fault diagnosis, so they should not be ratelimited. Signed-off-by: Huang Ying Signed-off-by: Len Brown --- drivers/acpi/apei/ghes.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index f703b2881153..f339c0f8369c 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -360,11 +360,8 @@ static void ghes_do_proc(struct ghes *ghes) } } -static void ghes_print_estatus(const char *pfx, struct ghes *ghes) +static void __ghes_print_estatus(const char *pfx, struct ghes *ghes) { - /* Not more than 2 messages every 5 seconds */ - static DEFINE_RATELIMIT_STATE(ratelimit, 5*HZ, 2); - if (pfx == NULL) { if (ghes_severity(ghes->estatus->error_severity) <= GHES_SEV_CORRECTED) @@ -372,12 +369,18 @@ static void ghes_print_estatus(const char *pfx, struct ghes *ghes) else pfx = KERN_ERR HW_ERR; } - if (__ratelimit(&ratelimit)) { - printk( - "%s""Hardware error from APEI Generic Hardware Error Source: %d\n", - pfx, ghes->generic->header.source_id); - apei_estatus_print(pfx, ghes->estatus); - } + printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n", + pfx, ghes->generic->header.source_id); + apei_estatus_print(pfx, ghes->estatus); +} + +static void ghes_print_estatus(const char *pfx, struct ghes *ghes) +{ + /* Not more than 2 messages every 5 seconds */ + static DEFINE_RATELIMIT_STATE(ratelimit, 5*HZ, 2); + + if (__ratelimit(&ratelimit)) + __ghes_print_estatus(pfx, ghes); } static int ghes_proc(struct ghes *ghes) @@ -476,7 +479,7 @@ static int ghes_notify_nmi(struct notifier_block *this, if (sev_global >= GHES_SEV_PANIC) { oops_begin(); - ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global); + __ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global); /* reboot to log the error! */ if (panic_timeout == 0) panic_timeout = ghes_panic_timeout; -- 2.20.1