Hi Rafael,
在 2024/12/11 1:59, Rafael J. Wysocki 写道:
On Fri, Nov 15, 2024 at 4:56 AM Xiaofei Tan <tanxiaofei@xxxxxxxxxx> wrote:
When the module hed is built-in, the init order is determined by
Makefile order.
Are you sure?
yes
That order violates expectations. Because the module
hed init is behind evged. RAS records can't be handled in the
special time window that evged has initialized while hed not.
If the number of such RAS records is more than the APEI HEST error
source number, the HEST resources could be occupied all, and then
could affect subsequent RAS error reporting.
Well, the problem is real, but does the change really prevent it from
happening or does it just increase the likelihood of success?
It can be completely solved if the driver used as built-in way. If build HED as a
module, it not solved.
In the latter case, and generally speaking too, it would be better to
add explicit synchronization between evged and hed.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Xiaofei Tan <tanxiaofei@xxxxxxxxxx>
---
drivers/acpi/Makefile | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 61ca4afe83dc..54f60b7922ad 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -15,6 +15,13 @@ endif
obj-$(CONFIG_ACPI) += tables.o
+#
+# The hed.o needs to be in front of evged.o to avoid the problem that
+# RAS errors cannot be handled in the special time window of startup
+# phase that evged has initialized while hed not.
+#
+obj-$(CONFIG_ACPI_HED) += hed.o
+
#
# ACPI Core Subsystem (Interpreter)
#
@@ -95,7 +102,6 @@ obj-$(CONFIG_ACPI_HOTPLUG_IOAPIC) += ioapic.o
obj-$(CONFIG_ACPI_BATTERY) += battery.o
obj-$(CONFIG_ACPI_SBS) += sbshc.o
obj-$(CONFIG_ACPI_SBS) += sbs.o
-obj-$(CONFIG_ACPI_HED) += hed.o
obj-$(CONFIG_ACPI_EC_DEBUGFS) += ec_sys.o
obj-$(CONFIG_ACPI_BGRT) += bgrt.o
obj-$(CONFIG_ACPI_CPPC_LIB) += cppc_acpi.o
--
2.33.0
.
