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* sched: zap the migration init / cache-hot balancing codeIngo Molnar2007-07-09
| | | | | | | | | | | | | | | | | | | | | | 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 <mingo@elte.hu>
* remove leftover documentation of acpi_generic_hotkeyStephen Hemminger2007-06-27
| | | | | | | This looks like leftover text in the kernel parameter in documentation. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Pull osi-now into release branchLen Brown2007-06-02
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| * ACPI: extend "acpi_osi=" boot optionLen Brown2007-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 string eg. acpi_osi="!Windows 2006" would disable Linux's claim of Vista compatibility. Signed-off-by: Len Brown <len.brown@intel.com>
* | SLUB: More documentationChristoph Lameter2007-05-31
|/ | | | | | | | | | Update documentation to describe how to read a SLUB error report. Add slub parameters to Documentation/kernel-parameters. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* document clocksourcesRandy Dunlap2007-05-23
| | | | | | | | | | Document the available clocksources per platform and move clocksource= into the correct (alpha) location in the file. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Doc Fix: remove mention of combined mode-related kernel parametersJesse Barnes2007-05-09
| | | | | | | | | 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 <jesse.barnes@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* vt: add documentation for new boot/sysfs optionsAntonino A. Daplas2007-05-08
| | | | | | | | | Add description to Documentation/kernel-parameters.txt on new options default_blue, default_grn, default_red, and default_utf8. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86, serial: convert legacy COM ports to platform devicesBjorn Helgaas2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 16550A This 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 <bjorn.helgaas@hp.com> Cc: Keith Owens <kaos@ocs.com.au> Cc: Len Brown <lenb@kernel.org> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Matthieu CASTET <castet.matthieu@free.fr> Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Ville Syrjala <syrjala@sci.fi> Cc: Russell King <rmk+serial@arm.linux.org.uk> Cc: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* smsc-ircc2: add PNP supportBjorn Helgaas2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.diff Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Keith Owens <kaos@ocs.com.au> Cc: Len Brown <lenb@kernel.org> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Matthieu CASTET <castet.matthieu@free.fr> Cc: Jean Tourrilhes <jt@hpl.hp.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Ville Syrjala <syrjala@sci.fi> Cc: Russell King <rmk+serial@arm.linux.org.uk> Acked-by: Samuel Ortiz <samuel@sortiz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] i386: PARAVIRT: Allow boot-time disable of paravirt_ops patchingJeremy Fitzhardinge2007-05-02
| | | | | | | | | | Add "noreplace-paravirt" to disable paravirt_ops patching. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: Allow boot-time disable of SMP altinstructionsJeremy Fitzhardinge2007-05-02
| | | | | | | Add "noreplace-smp" to disable SMP instruction replacement. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: Don't use MWAIT on AMD Family 10Andi Kleen2007-05-02
| | | | | | | | | | | 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 <ak@suse.de>
* [PATCH] i386: Make COMPAT_VDSO runtime selectable.Jeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <hugh@veritas.com> 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 <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Zachary Amsden <zach@vmware.com> Cc: "Jan Beulich" <JBeulich@novell.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com>
* Merge branch 'release' of ↵Linus Torvalds2007-04-29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * '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 ...
| * ACPI: Improve acpi debug documentationZhang Rui2007-04-25
| | | | | | | | | | | | | | | | | | 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 <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | USB: Allow autosuspend delay to equal 0Alan Stern2007-04-27
|/ | | | | | | | | | | 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 <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Revert "ACPI: parse 2nd MADT by default"Len Brown2007-03-30
| | | | | | | This reverts commit 09fe58356d148ff66901ddf639e725ca1a48a0af. http://bugzilla.kernel.org/show_bug.cgi?id=8283 Signed-off-by: Len Brown <len.brown@intel.com>
* x86-64: add "local_apic_timer_c2_ok" here tooLinus Torvalds2007-03-23
| | | | | | | | | 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 <torvalds@linux-foundation.org>
* [PATCH] i386: add command line option "local_apic_timer_c2_ok"Thomas Gleixner2007-03-23
| | | | | | | | | | | | | | 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 <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'release' of ↵Linus Torvalds2007-03-22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * '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
| * ACPI: parse 2nd MADT by defaultLen Brown2007-03-15
| | | | | | | | | | | | http://bugzilla.kernel.org/show_bug.cgi?id=7465 Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: Add support to parse 2nd MADTLen Brown2007-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <len.brown@intel.com>
* | [PATCH] i386: disable local apic timer via command line or dmi quirkThomas Gleixner2007-03-22
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Grudgingly-acked-by: Andi Kleen <ak@suse.de> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Pull misc-for-upstream into release branchLen Brown2007-03-09
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| * ACPI: Add kernel-parameters hint that acpi=off doesn't work on IA64.Bernhard Walle2007-03-07
| | | | | | | | | | | | Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds2007-03-07
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | * 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.
| * doc: Add SH to vdso and earlyprintk in kernel-parameters.txtPaul Mundt2007-03-05
| | | | | | | | | | | | SH supports both of these options, add it to the docs. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | [PATCH] knfsd: provide sunrpc pool_mode module optionGreg Banks2007-03-06
|/ | | | | | | | | | | | | | | | | | | | | | 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 node Note 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 <gnb@melbourne.sgi.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* USB: make autosuspend delay a module parameterAlan Stern2007-02-23
| | | | | | | | | | | | | | | | 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 <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2007-02-19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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. ...
| * doc: make doc. for maxcpus= more visibleRandy Dunlap2007-02-17
| | | | | | | | | | | | | | | | | | 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 <rdunlap@xenotime.net> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* | Merge branch 'acpi' of ↵Linus Torvalds2007-02-19
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev * '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
| * | [PATCH] libata: ACPI and _GTF supportKristen Carlson Accardi2007-02-16
| |/ | | | | | | | | | | | | | | | | | | _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 <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> (cherry picked from 9c69cab24b51a89664f4c0dfaf8a436d32117624 commit)
* / PCI: Make CARDBUS_MEM_SIZE and CARDBUS_IO_SIZE boot optionsAtsushi Nemoto2007-02-16
|/ | | | | | | | | | | | | | | | 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 <anemo@mba.ocn.ne.jp> Cc: Daniel Ritz <daniel.ritz@gmx.ch> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] hrtimers: add high resolution timer supportThomas Gleixner2007-02-16
| | | | | | | | | | | | | 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 <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] tick-management: dyntick / highres functionalityThomas Gleixner2007-02-16
| | | | | | | | | | | | | | | | | With Ingo Molnar <mingo@elte.hu> 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 <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] i386: add option to show more code in oops reportsChuck Ebbert2007-02-13
| | | | | | | | | | | | 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 <cebbert@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] x86-64: improved iommu documentationKarsten Weiss2007-02-13
| | | | | | | | | | | | | | | | | | | | - 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<<order" instead of "32MB^order". - Mention the default "order" value. - list the four existing PCI-DMA mapping implementations of arch x86_64 - group the iommu= option keywords by PCI-DMA mapping implementation. - Distinguish iommu= option keywords from number arguments. - Explain the meaning of DAC and SAC. Signed-off-by: Karsten Weiss <knweiss@science-computing.de> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
* [PATCH] Add retain_initrd boot optionMichael Neuling2007-02-11
| | | | | | | | | | | | | | | | 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 <mikey@neuling.org> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* UHCI: module parameter to ignore overcurrent changesAlan Stern2006-12-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | Certain boards seem to like to issue false overcurrent notifications, for example on ports that don't have anything connected to them. This looks like a hardware error, at the level of noise to those ports' overcurrent input signals (or non-debounced VBUS comparators). This surfaces to users as truly massive amounts of syslog spam from khubd (which is appropriate for real hardware problems, except for the volume from multiple ports). Using this new "ignore_oc" flag helps such systems work more sanely, by preventing such indications from getting to khubd (and spamming syslog). The downside is of course that true overcurrent errors will be masked; they'll appear as spontaneous disconnects, without the diagnostics that will let users troubleshoot issues like short-circuited cables. In addition, controllers with no devices attached will be forced to poll for new devices rather than relying on interrupts, since each overcurrent event would generate a new interrupt. This patch (as826) is essentially a copy of David Brownell's ignore_oc patch for ehci-hcd, ported to uhci-hcd. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] debug: add sysrq_always_enabled boot optionIngo Molnar2006-12-13
| | | | | | | | | | | | | | | Most distributions enable sysrq support but set it to 0 by default. Add a sysrq_always_enabled boot option to always-enable sysrq keys. Useful for debugging - without having to modify the disribution's config files (which might not be possible if the kernel is on a live CD, etc.). Also, while at it, clean up the sysrq interfaces. [bunk@stusta.de: make sysrq_always_enabled_setup() static] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fault injection: documentation and scriptsAkinobu Mita2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch set provides some fault-injection capabilities. - kmalloc() failures - alloc_pages() failures - disk IO errors We can see what really happens if those failures happen. In order to enable these fault-injection capabilities: 1. Enable relevant config options (CONFIG_FAILSLAB, CONFIG_PAGE_ALLOC, CONFIG_MAKE_REQUEST) and if you want to configure them via debugfs, enable CONFIG_FAULT_INJECTION_DEBUG_FS. 2. Build and boot with this kernel 3. Configure fault-injection capabilities behavior by boot option or debugfs - Boot option failslab= fail_page_alloc= fail_make_request= - Debugfs /debug/failslab/* /debug/fail_page_alloc/* /debug/fail_make_request/* Please refer to the Documentation/fault-injection/fault-injection.txt for details. 4. See what really happens. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Don Mullis <dwm@meer.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6Linus Torvalds2006-12-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (156 commits) [PATCH] x86-64: Export smp_call_function_single [PATCH] i386: Clean up smp_tune_scheduling() [PATCH] unwinder: move .eh_frame to RODATA [PATCH] unwinder: fully support linker generated .eh_frame_hdr section [PATCH] x86-64: don't use set_irq_regs() [PATCH] x86-64: check vector in setup_ioapic_dest to verify if need setup_IO_APIC_irq [PATCH] x86-64: Make ix86 default to HIGHMEM4G instead of NOHIGHMEM [PATCH] i386: replace kmalloc+memset with kzalloc [PATCH] x86-64: remove remaining pc98 code [PATCH] x86-64: remove unused variable [PATCH] x86-64: Fix constraints in atomic_add_return() [PATCH] x86-64: fix asm constraints in i386 atomic_add_return [PATCH] x86-64: Correct documentation for bzImage protocol v2.05 [PATCH] x86-64: replace kmalloc+memset with kzalloc in MTRR code [PATCH] x86-64: Fix numaq build error [PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header [PATCH] unwinder: Add debugging output to the Dwarf2 unwinder [PATCH] x86-64: Clarify error message in GART code [PATCH] x86-64: Fix interrupt race in idle callback (3rd try) [PATCH] x86-64: Remove unwind stack pointer alignment forcing again ... Fixed conflict in include/linux/uaccess.h manually Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] unwinder: Add debugging output to the Dwarf2 unwinderJan Beulich2006-12-06
| | | | | | | | | | | | | | | | | | | | | | | | | | Add debugging printks to the unwinder to allow easier debugging when something goes wrong with it. This can be controlled with the new unwinder_debug=N option Most output is given by N=1 AK: Added documentation of unwinder_debug= Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] paravirt: Add option to allow skipping the timer checkZachary Amsden2006-12-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a way to disable the timer IRQ routing check via a boot option. The VMI timer code uses this to avoid triggering the pester Mingo code, which probes for some very unusual and broken motherboard routings. It fires 100% of the time when using a paravirtual delay mechanism instead of using a realtime delay, since there is no elapsed real time, and the 4 timer IRQs have not yet been delivered. In addition, it is entirely possible, though improbable, that this bug could surface on real hardware which picks a particularly bad time to enter SMM mode, causing a long latency during one of the timer IRQs. While here, make check_timer be __init. Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andi Kleen <ak@suse.de> [chrisw: use no_timer_check to bring inline with x86_64 as per Andi's request] Signed-off-by: Chris Wright <chrisw@sous-sol.org> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
* | [PATCH] add ignore_loglevel boot optionIngo Molnar2006-12-07
| | | | | | | | | | | | | | | | | | | | Sometimes the kernel prints something interesting while userspace bootup keeps messages turned off via loglevel. Enable the printing of /all/ kernel messages via the "ignore_loglevel" boot option. Off by default. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] sleep profilingIngo Molnar2006-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement prof=sleep profiling. TASK_UNINTERRUPTIBLE sleeps will be taken as a profile hit, and every millisecond spent sleeping causes a profile-hit for the call site that initiated the sleep. Sample readprofile output on i386: 306 ps2_sendbyte 1.3973 432 call_usermodehelper_keys 1.9548 484 ps2_command 0.6453 790 __driver_attach 4.7879 1593 msleep 44.2500 3976 sync_buffer 64.1290 4076 do_lookup 12.4648 8587 sync_page 122.6714 20820 total 0.0067 (NOTE: architectures need to check whether get_wchan() can be called from deep within the wakeup path.) akpm: we need to mark more functions __sched. lock_sock(), msleep(), others.. akpm: the contention in do_lookup() is a surprise. Presumably doing disk reads for directory contents while holding i_mutex. [akpm@osdl.org: various fixes] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] get_options to allow a hypenated range for isolcpusDerek Fults2006-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows a hyphenated range of positive numbers in the string passed to command line helper function, get_options. Currently the command line option "isolcpus=" takes as its argument a list of cpus. Format: <cpu number>,...,<cpu number> Valid values of <cpu_number> include all cpus, 0 to "number of CPUs in system - 1". This can get extremely long when isolating the majority of cpus on a large system. The kernel isolcpus code would not need any changing to use this feature. To use it, the change would be in the command line format for 'isolcpus=' Format: <cpu number>,...,<cpu number> or <cpu number>-<cpu number> (must be a positive range in ascending order.) or a mixture <cpu number>,...,<cpu number>-<cpu number> Signed-off-by: Derek Fults <dfults@sgi.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] swsusp: document support for swap filesRafael J. Wysocki2006-12-07
| | | | | | | | | | | | | | | | | | | | Document the "resume_offset=" command line parameter as well as the way in which swap files are supported by swsusp. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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