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authorHuang Ying <ying.huang@intel.com>2011-12-08 11:25:44 +0800
committerLen Brown <len.brown@intel.com>2012-01-17 03:54:31 -0500
commit5ba82ab534a325d310fe02af1c149f1072792c7b (patch)
treea92545ade1a4898431dfd0f6ad9897c6c03931cb /drivers/acpi
parentad6861547b52ad7c31eacc336b79ac91d7fded75 (diff)
downloadlinux-5ba82ab534a325d310fe02af1c149f1072792c7b.tar.bz2
ACPI, APEI, GHES, Distinguish interleaved error report in kernel log
In most cases, printk only guarantees messages from different printk calling will not be interleaved between each other. But, one APEI GHES hardware error report will involve multiple printk calling, normally each for one line. So it is possible that the hardware error report comes from different generic hardware error source will be interleaved. In this patch, a sequence number is prefixed to each line of error report. So that, even if they are interleaved, they still can be distinguished by the prefixed sequence number. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/ghes.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 511b971d1148..9dcb2d86aeab 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -506,16 +506,22 @@ static void __ghes_print_estatus(const char *pfx,
const struct acpi_hest_generic *generic,
const struct acpi_hest_generic_status *estatus)
{
+ static atomic_t seqno;
+ unsigned int curr_seqno;
+ char pfx_seq[64];
+
if (pfx == NULL) {
if (ghes_severity(estatus->error_severity) <=
GHES_SEV_CORRECTED)
- pfx = KERN_WARNING HW_ERR;
+ pfx = KERN_WARNING;
else
- pfx = KERN_ERR HW_ERR;
+ pfx = KERN_ERR;
}
+ curr_seqno = atomic_inc_return(&seqno);
+ snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}" HW_ERR, pfx, curr_seqno);
printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
- pfx, generic->header.source_id);
- apei_estatus_print(pfx, estatus);
+ pfx_seq, generic->header.source_id);
+ apei_estatus_print(pfx_seq, estatus);
}
static int ghes_print_estatus(const char *pfx,
@@ -798,7 +804,7 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
if (sev_global >= GHES_SEV_PANIC) {
oops_begin();
- __ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global->generic,
+ __ghes_print_estatus(KERN_EMERG, ghes_global->generic,
ghes_global->estatus);
/* reboot to log the error! */
if (panic_timeout == 0)