On Thursday, February 20, 2014 02:14:58 PM Russ Anderson wrote: > On Tue, Feb 18, 2014 at 11:28:29AM -0500, Matthew Garrett wrote: > > The ACPI IPMI driver implements IPMI operation region support for the ACPI > > core. Systems that declare ACPI operation regions may reference them at any > > time, including during kernel initialisation. These accesses will fail > > unless the ACPI IPMI driver is present, and undesirable system behaviour > > may result. Set the default to Y in order to encourage distributions and > > users to configure kernels to avoid awkward surprises. > > No, please do not build the ipmi_si driver into the kernel. > Not all systems want, or need, the ipmi_si driver. > > The distro that added this change created all sorts of support > problems.
Which distro was that? Do you have any pointers to specific bug reports related to that? Rafael > Problems include kipmi0 spinning at 100% of cpu > (creating a performance hit) and long boot delays (as the > kernel tries to talk to a BMC that will never respond). > It has been a big mess. > > Nacked-by: Russ Anderson <r...@sgi.com> > > > > Signed-off-by: Matthew Garrett <matthew.garr...@nebula.com> > > --- > > Actually, I guess we also want this on CONFIG_IPMI_HANDLER for least > > surprise > > > > drivers/acpi/Kconfig | 2 +- > > drivers/char/ipmi/Kconfig | 2 ++ > > 2 files changed, 3 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig > > index 4770de5..0e6aab9 100644 > > --- a/drivers/acpi/Kconfig > > +++ b/drivers/acpi/Kconfig > > @@ -162,7 +162,7 @@ config ACPI_PROCESSOR > > config ACPI_IPMI > > tristate "IPMI" > > depends on IPMI_SI > > - default n > > + default y > > help > > This driver enables the ACPI to access the BMC controller. And it > > uses the IPMI request/response message to communicate with BMC > > diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig > > index 0baa8fa..eea8464 100644 > > --- a/drivers/char/ipmi/Kconfig > > +++ b/drivers/char/ipmi/Kconfig > > @@ -5,6 +5,7 @@ > > menuconfig IPMI_HANDLER > > tristate 'IPMI top-level message handler' > > depends on HAS_IOMEM > > + default y if ACPI > > help > > This enables the central IPMI message handler, required for IPMI > > to work. > > @@ -45,6 +46,7 @@ config IPMI_DEVICE_INTERFACE > > > > config IPMI_SI > > tristate 'IPMI System Interface handler' > > + default y if ACPI > > help > > Provides a driver for System Interfaces (KCS, SMIC, BT). > > Currently, only KCS and SMIC are supported. If > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
