10 Jul, 2007
1 commit
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the SMP load-balancer uses the boot-time migration-cost estimation
code to attempt to improve the quality of balancing. The reason for
this code is that the discrete priority queues do not preserve
the order of scheduling accurately, so the load-balancer skips
tasks that were running on a CPU 'recently'.this code is fundamental fragile: the boot-time migration cost detector
doesnt really work on systems that had large L3 caches, it caused boot
delays on large systems and the whole cache-hot concept made the
balancing code pretty undeterministic as well.(and hey, i wrote most of it, so i can say it out loud that it sucks ;-)
under CFS the same purpose of cache affinity can be achieved without
any special cache-hot special-case: tasks are sorted in the 'timeline'
tree and the SMP balancer picks tasks from the left side of the
tree, thus the most cache-cold task is balanced automatically.Signed-off-by: Ingo Molnar
28 Jun, 2007
1 commit
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This looks like leftover text in the kernel parameter in documentation.
Signed-off-by: Stephen Hemminger
Signed-off-by: Linus Torvalds
02 Jun, 2007
1 commit
31 May, 2007
1 commit
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Update documentation to describe how to read a SLUB error report.
Add slub parameters to Documentation/kernel-parameters.Signed-off-by: Christoph Lameter
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 May, 2007
1 commit
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The boot option "acpi_osi=" has always disabled Linux _OSI support,
thus disabling all OS Interface strings which are advertised
by Linux to the BIOS.Now...
acpi_osi="string" adds the interface string, and
acpi_osi="!string" invalidates the pre-defined interface stringeg. acpi_osi="!Windows 2006"
would disable Linux's claim of Vista compatibility.Signed-off-by: Len Brown
24 May, 2007
1 commit
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Document the available clocksources per platform and move clocksource= into
the correct (alpha) location in the file.Signed-off-by: Randy Dunlap
Acked-by: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 May, 2007
1 commit
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Looks like you removed the combined_mode quirk (yay!) but didn't update
kernel-parameters.txt... might confuse people. Here's a patch to remove
mention of it from the documentation.Signed-off-by: Jesse Barnes
Signed-off-by: Jeff Garzik
09 May, 2007
3 commits
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Add description to Documentation/kernel-parameters.txt on new options
default_blue, default_grn, default_red, and default_utf8.Signed-off-by: Antonino Daplas
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make x86 COM ports into platform devices and don't probe for them
if we have PNP.This prevents double discovery, where a device was found both by
the legacy probe and by 8250_pnp, e.g.,serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:02: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550AThis also means IRDA devices without a UART PNP ID will no longer be
claimed by the serial driver, which might require changes in IRDA
drivers and administration.In addition to this patch, you may need to configure a setserial init
script, e.g., /etc/init.d/setserial, so it doesn't poke legacy UART
stuff back in. On Debian, "dpkg-reconfigure setserial" with the "kernel"
option does this.To force the old legacy probe behavior even when we have PNPBIOS or
ACPI, load the new legacy_serial module (or build 8250 static) with
the "legacy_serial.force" option.[akpm@linux-foundation.org: fix makefiles]
Signed-off-by: Bjorn Helgaas
Cc: Keith Owens
Cc: Len Brown
Cc: Adam Belay
Cc: Matthieu CASTET
Cc: Jean Tourrilhes
Cc: Matthew Garrett
Cc: Ville Syrjala
Cc: Russell King
Cc: Samuel Ortiz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Claim devices using PNP, unless the user explicitly specified device
addresses. This can be disabled with the "smsc-ircc2.nopnp" option.This removes the need for probing legacy addresses and helps untangle IR
devices from serial8250 devices.Sometimes the SMC device is at a legacy COM port address but does not use the
legacy COM IRQ. In this case, claiming the device using PNP rather than 8250
legacy probe means we can automatically use the correct IRQ rather than
forcing the user to use "setserial" to set the IRQ manually.If the PNP claim doesn't work, make sure you don't have a setserial init
script, e.g., /etc/init.d/setserial, configured to poke in legacy COM port
resources for the IRDA device. That causes the serial driver to claim
resources needed by this driver.Based on this patch by Ville Syrjälä:
http://www.hpl.hp.com/personal/Jean_Tourrilhes/IrDA/ir260_smsc_pnp.diffSigned-off-by: Bjorn Helgaas
Cc: Keith Owens
Cc: Len Brown
Cc: Adam Belay
Cc: Matthieu CASTET
Cc: Jean Tourrilhes
Cc: Matthew Garrett
Cc: Ville Syrjala
Cc: Russell King
Acked-by: Samuel Ortiz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 May, 2007
4 commits
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Add "noreplace-paravirt" to disable paravirt_ops patching.
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Rusty Russell
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Add "noreplace-smp" to disable SMP instruction replacement.
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen -
It doesn't put the CPU into deeper sleep states, so it's better to use the standard
idle loop to save power. But allow to reenable it anyways for benchmarking.I also removed the obsolete idle=halt on i386
Cc: andreas.herrmann@amd.com
Signed-off-by: Andi Kleen
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Now that relocation of the VDSO for COMPAT_VDSO users is done at
runtime rather than compile time, it is possible to enable/disable
compat mode at runtime.This patch allows you to enable COMPAT_VDSO mode with "vdso=2" on the
kernel command line, or via sysctl. (Switching on a running system
shouldn't be done lightly; any process which was relying on the compat
VDSO will be upset if it goes away.)The COMPAT_VDSO config option still exists, but if enabled it just
makes vdso_enabled default to VDSO_COMPAT.+From: Hugh Dickins
Fix oops from i386-make-compat_vdso-runtime-selectable.patch.
Even mingetty at system startup finds it easy to trigger an oops
while reading /proc/PID/maps: though it has a good hold on the mm
itself, that cannot stop exit_mm() from resetting tsk->mm to NULL.(It is usually show_map()'s call to get_gate_vma() which oopses,
and I expect we could change that to check priv->tail_vma instead;
but no matter, even m_start()'s call just after get_task_mm() is racy.)Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: Zachary Amsden
Cc: "Jan Beulich"
Cc: Eric W. Biederman
Cc: Andi Kleen
Cc: Ingo Molnar
Cc: Roland McGrath
30 Apr, 2007
1 commit
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (105 commits)
sonypi: use mutex instead of semaphore
sony-laptop: remove user visible camera controls as platform attributes
meye: make meye use sony-laptop instead of sonypi
sony-laptop: add a meye-usable include file for camera ops
sony-laptop: complete the motion eye camera support in sony-laptop
sonypi: try to detect if sony-laptop has already taken one of the known ioports
sonypi: suggest sonypi users to try sony-laptop instead
sony-laptop: add edge modem support (also called WWAN)
sony-laptop: add locking on accesses to the ioport and global vars
sony-laptop: add camera enable/disable parameter, better handle possible infinite loop
thinkpad-acpi: make drivers/misc/thinkpad_acpi:fan_mutex static
ACPI: thinkpad-acpi: add sysfs support to wan and bluetooth subdrivers
ACPI: thinkpad-acpi: add sysfs support to hotkey subdriver
ACPI: thinkpad-acpi: improve dock subdriver initialization
ACPI: thinkpad-acpi: improve debugging for acpi helpers
ACPI: thinkpad-acpi: improve fan control documentation
ACPI: thinkpad-acpi: map ENXIO to EINVAL for fan sysfs
ACPI: thinkpad-acpi: fix a fan watchdog invocation
ACPI: thinkpad-acpi: do not arm fan watchdog if it would not work
ACPI: thinkpad-acpi: add a fan-control feature master toggle
...
28 Apr, 2007
1 commit
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This patch (as867) adds an entry for the new power/autosuspend
attribute in Documentation/ABI/testing, and it changes the behavior of
the delay value. Now a delay of 0 means to autosuspend as soon as
possible, and negative values will prevent autosuspend.Signed-off-by: Alan Stern
Signed-off-by: Greg Kroah-Hartman
25 Apr, 2007
1 commit
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Now we use acpi.debug_level and acpi.debug_layer as kernel boot
parameters instead of acpi_dbg_level and acpi_dbg_layer.
Thanks to Andi Kleen for pointing it out.Signed-off-by: Zhang Rui
Signed-off-by: Len Brown
31 Mar, 2007
1 commit
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This reverts commit 09fe58356d148ff66901ddf639e725ca1a48a0af.
http://bugzilla.kernel.org/show_bug.cgi?id=8283Signed-off-by: Len Brown
24 Mar, 2007
2 commits
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Needed for any architecture that claims ARCH_APICTIMER_STOPS_ON_C3,
not just i386.I'm hoping Thomas will clean this up a bit later..
Signed-off-by: Linus Torvalds
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It turned out that it is almost impossible to trust ACPI, BIOS & Co.
regarding the C states. This was the reason to switch the local apic
timer off in C2 state already. OTOH there are sane and well behaving
systems, which get punished by that decision.Allow the user to confirm that the local apic timer is trustworthy in C2
state. This keeps the default behaviour on the safe side.Signed-off-by: Thomas Gleixner
Acked-by: Ingo Molnar
Signed-off-by: Linus Torvalds
23 Mar, 2007
2 commits
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* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: IA64: fix %ll build warnings
ACPI: IA64: fix allnoconfig build
ACPI: Only use IPI on known broken machines (AMD, Dothan/BaniasPentium M)
ACPI: ibm-acpi: allow module to load when acpi notifiers can't be set (v2)
ACPI: parse 2nd MADT by default
ACPICA: revert "acpi_serialize" changes
sony-laptop: MAINTAINERS fix entry, add L: and W:
ACPI: resolve HP nx6125 S3 immediate wakeup regression
ACPI: Add support to parse 2nd MADT -
The local APIC timer stops to work in deeper C-States. This is handled by
the ACPI code and a broadcast mechanism in the clockevents / tick managment
code.Some systems do not expose the deeper C-States to the kernel, but switch
into deeper C-States behind the kernels back. This delays the local apic
timer interrupts for ever and makes the systems unusable.Add a command line option to disable the local apic timer and a dmi
quirk for known broken systems.Andi sayeth:
While not wrong by itself i think it is still better to use some heuristic
-- like "has battery in ACPI" With the DMI table if the problem is more wide
spread we will just continue extending it.But anyways should be ok now for .21 although I'm not really happy with
it.Signed-off-by: Thomas Gleixner
Acked-by: Ingo Molnar
Cc: john stultz
Grudgingly-acked-by: Andi Kleen
Cc: Len Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Mar, 2007
1 commit
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http://bugzilla.kernel.org/show_bug.cgi?id=7465
Signed-off-by: Len Brown
11 Mar, 2007
1 commit
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When a BIOS bug presents multiple APIC/MADTs,
Linux currently uses the 1st and ignores the 2nd.But some machines work better if we use the 2nd.
http://bugzilla.kernel.org/show_bug.cgi?id=7465
Add a warning and boot parameter "acpi_apic_instance=2"
to allow parsing the 2nd.No change to default behaviour in this patch.
Signed-off-by: Len Brown
10 Mar, 2007
1 commit
08 Mar, 2007
1 commit
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* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Kill off I/O cruft for R7780RP.
sh: Revert lazy dcache writeback changes.
sh: Enable SM501 support for RTS7751R2D.
sh: Use L1_CACHE_BYTES for .data.cacheline_aligned.
sysctl: Support vdso_enabled sysctl on SH.
sh: Fix kernel thread stack corruption with preempt.
doc: Add SH to vdso and earlyprintk in kernel-parameters.txt
sh: Fix sigmask trampling in signal delivery.
sh: Clear UBC when not in use.
07 Mar, 2007
2 commits
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Signed-off-by: Bernhard Walle
Signed-off-by: Andrew Morton
Signed-off-by: Len Brown -
Provide a module param "pool_mode" for sunrpc.ko which allows a sysadmin to
choose the mode for mapping NFS thread service pools to CPUs. Values are:auto choose a mapping mode heuristically
global (default, same as the pre-2.6.19 code) a single global pool
percpu one pool per CPU
pernode one pool per NUMA nodeNote that since 2.6.19 the hardcoded behaviour has been "auto", this patch
makes the default "global".The pool mode can be changed after boot/modprobe using /sys, if the NFS and
lockd services have been shut down. A useful side effect of this change is to
fix a small memory leak when unloading the module.Signed-off-by: Greg Banks
Signed-off-by: Neil Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Mar, 2007
1 commit
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SH supports both of these options, add it to the docs.
Signed-off-by: Paul Mundt
24 Feb, 2007
1 commit
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This patch (as859) makes the default USB autosuspend delay a module
parameter of usbcore. By setting the delay value at boot time, users
will be able to prevent the system from autosuspending devices which
for some reason can't handle it.The patch also stores the autosuspend delay as a per-device value. A
later patch will allow the user to change the value, tailoring the
delay for each individual device. A delay value of 0 will prevent
autosuspend.Signed-off-by: Alan Stern
Signed-off-by: Greg Kroah-Hartman
20 Feb, 2007
2 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits)
Documentation/kernel-docs.txt update.
arch/cris: typo in KERN_INFO
Storage class should be before const qualifier
kernel/printk.c: comment fix
update I/O sched Kconfig help texts - CFQ is now default, not AS.
Remove duplicate listing of Cris arch from README
kbuild: more doc. cleanups
doc: make doc. for maxcpus= more visible
drivers/net/eexpress.c: remove duplicate comment
add a help text for BLK_DEV_GENERIC
correct a dead URL in the IP_MULTICAST help text
fix the BAYCOM_SER_HDX help text
fix SCSI_SCAN_ASYNC help text
trivial documentation patch for platform.txt
Fix typos concerning hierarchy
Fix comment typo "spin_lock_irqrestore".
Fix misspellings of "agressive".
drivers/scsi/a100u2w.c: trivial typo patch
Correct trivial typo in log2.h.
Remove useless FIND_FIRST_BIT() macro from cardbus.c.
... -
* 'acpi' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[PATCH] libata: wrong sizeof for BUFFER
[PATCH] libata: change order of _SDD/_GTF execution (resend #3)
[PATCH] libata: ACPI _SDD support
[PATCH] libata: ACPI and _GTF support
18 Feb, 2007
1 commit
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Some people are confused about maxcpus=1 and maxcpus=0,
so put the documentation text from init/main.c into
Documentation/kernel-parameters.txt also.Signed-off-by: Randy Dunlap
Signed-off-by: Adrian Bunk
17 Feb, 2007
4 commits
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CARDBUS_MEM_SIZE was increased to 64MB on 2.6.20-rc2, but larger size might
result in allocation failure for the reserving itself on some platforms
(for example typical 32bit MIPS). Make it (and CARDBUS_IO_SIZE too)
customizable by "pci=" option for such platforms.Signed-off-by: Atsushi Nemoto
Cc: Daniel Ritz
Cc: Ralf Baechle
Cc: Ivan Kokshaysky
Cc: Dominik Brodowski
Signed-off-by: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
_GTF is an acpi method that is used to reinitialize the drive. It returns
a task file containing ata commands that are sent back to the drive to restore
it to boot up defaults.Signed-off-by: Kristen Carlson Accardi
Signed-off-by: Jeff Garzik
(cherry picked from 9c69cab24b51a89664f4c0dfaf8a436d32117624 commit) -
Implement high resolution timers on top of the hrtimers infrastructure and the
clockevents / tick-management framework. This provides accurate timers for
all hrtimer subsystem users.Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
Cc: john stultz
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
With Ingo Molnar
Add functions to provide dynamic ticks and high resolution timers. The code
which keeps track of jiffies and handles the long idle periods is shared
between tick based and high resolution timer based dynticks. The dyntick
functionality can be disabled on the kernel commandline. Provide also the
infrastructure to support high resolution timers.Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
Cc: john stultz
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Feb, 2007
2 commits
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Sometimes developers need to see more object code in an oops report,
e.g. when kernel may be corrupted at runtime.Add the "code_bytes" option for this.
Signed-off-by: Chuck Ebbert
Signed-off-by: Andi Kleen
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
- add SWIOTLB config help text
- mention Documentation/x86_64/boot-options.txt in
Documentation/kernel-parameters.txt
- remove the duplication of the iommu kernel parameter documentation.
- Better explanation of some of the iommu kernel parameter options.
- "32MB<
Signed-off-by: Andi Kleen
Acked-by: Muli Ben-Yehuda
Cc: Andi Kleen
Signed-off-by: Andrew Morton
12 Feb, 2007
1 commit
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Add retain_initrd option to control freeing of initrd memory after
extraction. By default, free memory as previously.The first boot will need to hold a copy of the in memory fs for the second
boot. This image can be large (much larger than the kernel), hence we can
save time when the memory loader is slow. Also, it reduces the memory
footprint while extracting the first boot since you don't need another copy
of the fs.Signed-off-by: Michael Neuling
Cc: "Randy.Dunlap"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
