http://bugzilla.kernel.org/show_bug.cgi?id=15106
Summary: kacpi_notify_wq and kacpi_wq use a lot of cpu
Product: ACPI
Version: 2.5
Kernel Version: 2.6.32-rc5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ACPICA-Core
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Sometimes kacpi_notify_wq and kacpid_wq workqueues use a lot of cpu.
I'm using yesterday's tip on a hp-compaq 610 laptop. At times
kacpi_notify_wq uses 30-50% of my cpu and kacpid_wq uses 3-5%:
# uptime
12:49:54 up 4:16, 1 user, load average: 0.52, 0.55, 0.40
# ps -e | grep kacpi
189 ? 00:00:52 kacpid
190 ? 00:10:26 kacpi_notify
191 ? 00:00:00 kacpi_hotplug
This sometimes happens after a few hours of uptime; so this is
very hard to bisect (by the way, I think the same thing causes
the fans to work fullspeed sometimes when I reboot the machine).
I tried this patch to find out which of the callers of
acpi_os_execute() is the culprit:
=== patch ====
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index afacf44..eded044 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -504,6 +504,7 @@ static void ACPI_SYSTEM_XFACE
acpi_ev_asynch_execute_gpe_method(void *context)
acpi_status status;
struct acpi_gpe_event_info local_gpe_event_info;
struct acpi_evaluate_info *info;
+ printk("acpi_ev_asynch_execute_gpe_method\n");
ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
@@ -577,6 +578,7 @@ static void ACPI_SYSTEM_XFACE
acpi_ev_asynch_execute_gpe_method(void *context)
static void acpi_ev_asynch_enable_gpe(void *context)
{
struct acpi_gpe_event_info *gpe_event_info = context;
+ printk("acpi_ev_asynch_enable_gpe\n");
acpi_status status;
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
ACPI_GPE_LEVEL_TRIGGERED) {
diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c
index ce224e1..e2307d1 100644
--- a/drivers/acpi/acpica/evmisc.c
+++ b/drivers/acpi/acpica/evmisc.c
@@ -224,6 +224,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void
*context)
acpi_notify_handler global_handler = NULL;
void *global_context = NULL;
union acpi_operand_object *handler_obj;
+ printk("acpi_ev_notify_dispatch\n");
ACPI_FUNCTION_ENTRY();
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index fd1801b..f3d8cc1 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -514,6 +514,7 @@ static void acpi_ec_gpe_query(void *ec_cxt)
struct acpi_ec *ec = ec_cxt;
u8 value = 0;
struct acpi_ec_query_handler *handler, copy;
+ printk("acpi_ec_gpe_query\n");
if (!ec || acpi_ec_query(ec, &value))
return;
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index d933980..99f39db 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -217,6 +217,7 @@ EXPORT_SYMBOL_GPL(acpi_smbus_unregister_callback);
static inline void acpi_smbus_callback(void *context)
{
struct acpi_smb_hc *hc = context;
+ printk("acpi_smbus_callback\n");
if (hc->callback)
hc->callback(hc->context);
}
=== patch ====
This was produced when the kacpi_notify high cpu usage happened:
=== dmesg ====
...
[12786.473794] acpi_ev_asynch_enable_gpe
[12786.473803] acpi_ev_notify_dispatch
[12786.476741] acpi_ev_asynch_execute_gpe_method
[12786.477109] acpi_ev_notify_dispatch
[12786.482973] acpi_ev_asynch_enable_gpe
[12786.482982] acpi_ev_notify_dispatch
[12786.483033] acpi_ev_asynch_execute_gpe_method
[12786.489049] acpi_ev_notify_dispatch
[12786.494038] acpi_ev_asynch_enable_gpe
[12786.494083] acpi_ev_asynch_execute_gpe_method
[12786.494434] acpi_ev_notify_dispatch
[12786.496798] acpi_ev_asynch_enable_gpe
[12786.496845] acpi_ev_asynch_execute_gpe_method
[12786.497210] acpi_ev_notify_dispatch
[12786.503034] acpi_ev_asynch_enable_gpe
[12786.503043] acpi_ev_notify_dispatch
[12786.504363] acpi_ev_asynch_execute_gpe_method
[12786.505198] acpi_ev_notify_dispatch
[12786.511051] acpi_ev_asynch_enable_gpe
[12786.511093] acpi_ev_notify_dispatch
[12786.511100] acpi_ev_asynch_execute_gpe_method
[12786.517091] acpi_ev_notify_dispatch
[12786.518697] acpi_ev_asynch_enable_gpe
[12786.518706] acpi_ev_notify_dispatch
[12786.524051] acpi_ev_asynch_execute_gpe_method
[12786.524409] acpi_ev_notify_dispatch
[12786.530079] acpi_ev_asynch_enable_gpe
[12786.530089] acpi_ev_notify_dispatch
[12786.530128] acpi_ev_asynch_execute_gpe_method
[12786.536094] acpi_ev_notify_dispatch
[12786.537761] acpi_ev_asynch_enable_gpe
[12786.537770] acpi_ev_notify_dispatch
[12786.537936] acpi_ev_asynch_execute_gpe_method
[12786.543131] acpi_ev_notify_dispatch
[12786.545642] acpi_ev_asynch_enable_gpe
[12786.545651] acpi_ev_notify_dispatch
[12786.545692] acpi_ev_asynch_execute_gpe_method
[12786.552133] acpi_ev_notify_dispatch
[12786.557167] acpi_ev_asynch_enable_gpe
[12786.557176] acpi_ev_notify_dispatch
[12786.557215] acpi_ev_asynch_execute_gpe_method
[12786.560062] acpi_ev_notify_dispatch
[12786.565185] acpi_ev_asynch_enable_gpe
[12786.565227] acpi_ev_notify_dispatch
[12786.565234] acpi_ev_asynch_execute_gpe_method
[12786.571202] acpi_ev_notify_dispatch
[12786.572811] acpi_ev_asynch_enable_gpe
[12786.575307] acpi_ev_asynch_execute_gpe_method
[12786.575664] acpi_ev_notify_dispatch
[12786.581250] acpi_ev_asynch_enable_gpe
[12786.581260] acpi_ev_notify_dispatch
[12786.581307] acpi_ev_asynch_execute_gpe_method
[12786.587251] acpi_ev_notify_dispatch
[12786.588854] acpi_ev_asynch_enable_gpe
[12786.588863] acpi_ev_notify_dispatch
[12786.822334] acpi_ev_asynch_execute_gpe_method
[12786.822710] acpi_ev_notify_dispatch
[12786.828829] acpi_ev_asynch_enable_gpe
[12786.828838] acpi_ev_notify_dispatch
[12786.828881] acpi_ev_asynch_execute_gpe_method
[12786.833867] acpi_ev_notify_dispatch
[12786.836233] acpi_ev_asynch_enable_gpe
[12786.836242] acpi_ev_notify_dispatch
[12786.957678] acpi_ev_asynch_execute_gpe_method
[12786.958065] acpi_ev_notify_dispatch
[12786.964196] acpi_ev_asynch_enable_gpe
[12786.964205] acpi_ev_notify_dispatch
[12786.964244] acpi_ev_asynch_execute_gpe_method
[12786.970213] acpi_ev_notify_dispatch
[12786.971816] acpi_ev_asynch_enable_gpe
[12786.971825] acpi_ev_notify_dispatch
[12786.997100] acpi_ev_asynch_execute_gpe_method
[12786.997472] acpi_ev_notify_dispatch
[12787.003279] acpi_ev_asynch_enable_gpe
[12787.003290] acpi_ev_notify_dispatch
[12787.003317] acpi_ev_asynch_execute_gpe_method
[12787.008331] acpi_ev_notify_dispatch
[12787.010682] acpi_ev_asynch_enable_gpe
[12787.010692] acpi_ev_notify_dispatch
[12787.309017] acpi_ev_asynch_execute_gpe_method
[12787.313035] acpi_ev_notify_dispatch
[12787.315300] acpi_ev_asynch_enable_gpe
[12787.319026] acpi_ev_asynch_execute_gpe_method
[12787.319387] acpi_ev_notify_dispatch
[12787.326065] acpi_ev_asynch_enable_gpe
[12787.326075] acpi_ev_notify_dispatch
[12787.326113] acpi_ev_asynch_execute_gpe_method
[12787.332078] acpi_ev_notify_dispatch
[12787.333685] acpi_ev_asynch_enable_gpe
[12787.333694] acpi_ev_notify_dispatch
[12788.338728] acpi_ev_asynch_execute_gpe_method
[12788.339140] acpi_ev_notify_dispatch
[12788.345606] acpi_ev_asynch_enable_gpe
[12788.345616] acpi_ev_notify_dispatch
[12788.345660] acpi_ev_asynch_execute_gpe_method
[12788.350599] acpi_ev_notify_dispatch
[12788.352955] acpi_ev_asynch_enable_gpe
[12788.352965] acpi_ev_notify_dispatch
[12789.646199] acpi_ev_asynch_execute_gpe_method
[12789.646595] acpi_ev_notify_dispatch
[12789.652861] acpi_ev_asynch_enable_gpe
[12789.652871] acpi_ev_notify_dispatch
[12789.652913] acpi_ev_asynch_execute_gpe_method
[12789.658870] acpi_ev_notify_dispatch
[12789.660495] acpi_ev_asynch_enable_gpe
[12789.660505] acpi_ev_notify_dispatch
[12791.535774] acpi_ev_asynch_execute_gpe_method
[12791.536210] acpi_ev_notify_dispatch
[12791.542525] acpi_ev_asynch_enable_gpe
[12791.542535] acpi_ev_notify_dispatch
[12791.542580] acpi_ev_asynch_execute_gpe_method
[12791.547545] acpi_ev_notify_dispatch
[12791.549935] acpi_ev_asynch_enable_gpe
[12791.549944] acpi_ev_notify_dispatch
[12791.593592] acpi_ev_asynch_execute_gpe_method
[12791.593976] acpi_ev_notify_dispatch
[12791.599677] acpi_ev_asynch_enable_gpe
[12791.599686] acpi_ev_notify_dispatch
[12791.599730] acpi_ev_asynch_execute_gpe_method
[12791.604667] acpi_ev_notify_dispatch
[12791.607042] acpi_ev_asynch_enable_gpe
[12791.607052] acpi_ev_notify_dispatch
[12791.672433] acpi_ev_asynch_execute_gpe_method
[12791.672801] acpi_ev_notify_dispatch
[12791.678850] acpi_ev_asynch_enable_gpe
[12791.678859] acpi_ev_notify_dispatch
[12791.678902] acpi_ev_asynch_execute_gpe_method
[12791.683884] acpi_ev_notify_dispatch
[12791.686249] acpi_ev_asynch_enable_gpe
[12791.686259] acpi_ev_notify_dispatch
[12791.689514] acpi_ev_asynch_execute_gpe_method
[12791.689868] acpi_ev_notify_dispatch
[12791.696055] acpi_ev_asynch_enable_gpe
[12791.696064] acpi_ev_notify_dispatch
[12791.696103] acpi_ev_asynch_execute_gpe_method
[12791.701927] acpi_ev_notify_dispatch
[12791.703545] acpi_ev_asynch_enable_gpe
[12791.703554] acpi_ev_notify_dispatch
[12791.705273] acpi_ev_asynch_execute_gpe_method
[12791.705698] acpi_ev_notify_dispatch
[12791.711953] acpi_ev_asynch_enable_gpe
[12791.711962] acpi_ev_notify_dispatch
[12791.712031] acpi_ev_asynch_execute_gpe_method
[12791.716945] acpi_ev_notify_dispatch
[12791.719313] acpi_ev_asynch_enable_gpe
[12791.719322] acpi_ev_notify_dispatch
=== dmesg ====
--
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
------------------------------------------------------------------------------
Throughout its 18-year history, RSA Conference consistently attracts the
world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
http://p.sf.net/sfu/rsaconf-dev2dev
_______________________________________________
acpi-bugzilla mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
