Date: Mon, 09 Sep 2013 15:18:06 +0900 (JST) From: moto kawasaki <moto@kawasaki3.org> To: freebsd-acpi@freebsd.org Subject: Q: how to increase ACPI_MAX_TASKS Message-ID: <20130909.151806.1420591981150797795.moto@kawasaki3.org>
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Hello,
Could you please advice me how to increase ACPI_MAX_TASKS from 32
(default) to 64 or 128 ?
(1) I am running FreeBSD 9.1-RELEASE-p6, which was updated via freebsd-update.
# uname -srmv
FreeBSD 9.1-RELEASE-p6 FreeBSD 9.1-RELEASE-p6 #0: Wed Aug 21 20:40:52 UTC 2013 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
(2) Now, dmesg shows an error regarding AE_NO_MEMORY.
# dmesg
(snip)
AcpiOsExecute: failed to enqueue task, consider increasing the debug.acpi.max_tasks tunable
ACPI Error: Method parse/execution failed [\\_SB_.PCI0.HEC2.HSCI] (Node 0xfffffe001d208380), AE_NO_MEMORY (20110527/psparse-560)
ACPI Error: Method parse/execution failed [\\_GPE._L06] (Node 0xfffffe001d20c6c0), AE_NO_MEMORY (20110527/psparse-560)
ACPI Exception: AE_NO_MEMORY, while evaluating GPE method [_L06] (20110527/evgpe-606)
AcpiOsExecute: failed to enqueue task, consider increasing the debug.acpi.max_tasks tunable
(snip)
If needed, I will show all dmesg output. please request.
(3) This is because ACPI_MAX_TASKS is defined as 32 in /usr/src/sys/dev/acpica/acpivar.h
=====
/* Default maximum number of tasks to enqueue. */
#ifndef ACPI_MAX_TASKS
#define ACPI_MAX_TASKS 32
#endif
=====
(4) When I rewrite it to 64, the error in dmesg disappeared.
So far so good, but I have to re-compile the kernel in this case.
If possible, I'd like to change ACPI_MAX_TASKS value by
sysctl.conf or something like that.
(5) /usr/src/sys/dev/acpica/Osd/OsdSchedule.c mentions debug.acpi.max_tasks.
=====
/*
* Allow the user to tune the maximum number of tasks we may enqueue.
*/
static int acpi_max_tasks = ACPI_MAX_TASKS;
TUNABLE_INT("debug.acpi.max_tasks", &acpi_max_tasks);
=====
But, I cannot write this sysctl tunable. That is "unknown oid".
# sysctl debug.acpi.max_tasks
sysctl: unknown oid 'debug.acpi.max_tasks'
# sysctl -w debug.acpi.max_tasks=64
sysctl: unknown oid 'debug.acpi.max_tasks'
(6) If I have to re-compile the GENERIC kernel, where should I define
ACPI_MAX_TASKS ? /etc/make.conf? kernel configuration file? or
acpivar.h ?
Thank you very much!!
Best Regards
--
moto kawasaki <moto@kawasaki3.org> 090-2464-8454
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