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* doc: document the relax_domain_level kernel boot argumentPaul Jackson2008-07-04
| | | | | | | | | | Document the kernel boot parameter: relax_domain_level=. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Doc*/kernel-parameters.txt: fix stale referencesPavel Machek2008-07-04
| | | | | | | | | Fix stale references to source files in kernel-parameters.txt. Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'release' of ↵Linus Torvalds2008-05-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] fix personality(PER_LINUX32) performance issue [IA64] Properly unregister legacy interrupts [IA64] Remove NULL pointer check for argument never passed as NULL. [IA64] trivial cleanup for perfmon.c [IA64] trivial cleanup for entry.S [IA64] fix interrupt masking for pending works on kernel leave [IA64] allow user to force_pal_cache_flush [IA64] Don't reserve crashkernel memory > 4 GB [IA64] machvec support for SGI UV platform [IA64] Add header files for SGI UV platform
| * [IA64] allow user to force_pal_cache_flushAlex Chiang2008-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sequence executed in check_sal_cache_flush: - pend a timer interrupt - call SAL_CACHE_FLUSH - see if interrupt is still pending can hang HP machines with buggy SAL_CACHE_FLUSH implementations. Provide a kernel command-line argument to allow users skip this check if desired. Using this parameter will force ia64_sal_cache_flush to call ia64_pal_cache_flush() instead of SAL_CACHE_FLUSH. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | [S390] Remove last traces of cio_msg=.Cornelia Huck2008-05-15
|/ | | | | | | cio_msg= is gone, also remove it from kernel-parameters.txt. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2008-05-05
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: x86 PCI: call dmi_check_pciprobe() x86/pci: add pci=skip_isa_align command lines. x86/pci: remove flag in pci_cfg_space_size_ext x86: fix section mismatch in pci_scan_bus
| * x86/pci: add pci=skip_isa_align command lines.Yinghai Lu2008-05-05
| | | | | | | | | | | | | | | | | | | | | | | | so we don't align the io port start address for pci cards. also move out dmi check out acpi.c, because it has nothing to do with acpi. it could spare some calling when we have several peer root buses. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | m68k: remove old mac_esp cruftFinn Thain2008-05-05
| | | | | | | | | | | | | | | | | | Remove the rest of the old mac_esp driver. Also ditch the rest of the machw mechanism, it needs to be replaced by a fake openfirmware tree. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | infrastructure to debug (dynamic) objectsThomas Gleixner2008-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can see an ever repeating problem pattern with objects of any kind in the kernel: 1) freeing of active objects 2) reinitialization of active objects Both problems can be hard to debug because the crash happens at a point where we have no chance to decode the root cause anymore. One problem spot are kernel timers, where the detection of the problem often happens in interrupt context and usually causes the machine to panic. While working on a timer related bug report I had to hack specialized code into the timer subsystem to get a reasonable hint for the root cause. This debug hack was fine for temporary use, but far from a mergeable solution due to the intrusiveness into the timer code. The code further lacked the ability to detect and report the root cause instantly and keep the system operational. Keeping the system operational is important to get hold of the debug information without special debugging aids like serial consoles and special knowledge of the bug reporter. The problems described above are not restricted to timers, but timers tend to expose it usually in a full system crash. Other objects are less explosive, but the symptoms caused by such mistakes can be even harder to debug. Instead of creating specialized debugging code for the timer subsystem a generic infrastructure is created which allows developers to verify their code and provides an easy to enable debug facility for users in case of trouble. The debugobjects core code keeps track of operations on static and dynamic objects by inserting them into a hashed list and sanity checking them on object operations and provides additional checks whenever kernel memory is freed. The tracked object operations are: - initializing an object - adding an object to a subsystem list - deleting an object from a subsystem list Each operation is sanity checked before the operation is executed and the subsystem specific code can provide a fixup function which allows to prevent the damage of the operation. When the sanity check triggers a warning message and a stack trace is printed. The list of operations can be extended if the need arises. For now it's limited to the requirements of the first user (timers). The core code enqueues the objects into hash buckets. The hash index is generated from the address of the object to simplify the lookup for the check on kfree/vfree. Each bucket has it's own spinlock to avoid contention on a global lock. The debug code can be compiled in without being active. The runtime overhead is minimal and could be optimized by asm alternatives. A kernel command line option enables the debugging code. Thanks to Ingo Molnar for review, suggestions and cleanup patches. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Basic braille screen reader supportSamuel Thibault2008-04-30
|/ | | | | | | | | | | | | | | This adds a minimalistic braille screen reader support. This is meant to be used by blind people e.g. on boot failures or when / cannot be mounted etc and thus the userland screen readers can not work. [akpm@linux-foundation.org: fix exports] Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: Jiri Kosina <jikos@jikos.cz> Cc: Dmitry Torokhov <dtor@mail.ru> Acked-by: Alan Cox <alan@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* edd: add default mode CONFIG_EDD_OFF=n, override with edd={on,off}Tim Gardner2008-04-29
| | | | | | | | | | | | | | | Add a kernel parameter option to 'edd' to enable/disable BIOS Enhanced Disk Drive Services. CONFIG_EDD_OFF disables EDD while still compiling EDD into the kernel. Default behavior can be forced using 'edd=on' or 'edd=off' as a kernel parameter. [akpm@linux-foundation.org: fix kernel-parameters.txt] Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Cc: "H. Peter Anvin" <hpa@zytor.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>
* x86: olpc: add One Laptop Per Child architecture supportAndres Salomon2008-04-29
| | | | | | | | | | | | | | | | | | | | | This adds support for OLPC XO hardware. Open Firmware on XOs don't contain the VSA, so it is necessary to emulate the PCI BARs in the kernel. This also adds functionality for running EC commands, and a CONFIG_OLPC. A number of OLPC drivers depend upon CONFIG_OLPC. olpc_ec_timeout is a hack to work around Embedded Controller bugs. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: geode_has_vsa build fix] [akpm@linux-foundation.org: olpc_register_battery_callback doesn't exist] Signed-off-by: Andres Salomon <dilinger@debian.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ide: remove obsoleted "idex=" kernel parametersBartlomiej Zolnierkiewicz2008-04-27
| | | | | | | | | * Remove obsoleted "idex=" kernel parameters. * Make probe_* and cmd640_vlb variables static. Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds2008-04-21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6: (42 commits) PCI: Change PCI subsystem MAINTAINER PCI: pci-iommu-iotlb-flushing-speedup PCI: pci_setup_bridge() mustn't be __devinit PCI: pci_bus_size_cardbus() mustn't be __devinit PCI: pci_scan_device() mustn't be __devinit PCI: pci_alloc_child_bus() mustn't be __devinit PCI: replace remaining __FUNCTION__ occurrences PCI: Hotplug: fakephp: Return success, not ENODEV, when bus rescan is triggered PCI: Hotplug: Fix leaks in IBM Hot Plug Controller Driver - ibmphp_init_devno() PCI: clean up resource alignment management PCI: aerdrv_acpi.c: remove unneeded NULL check PCI: Update VIA CX700 quirk PCI: Expose PCI VPD through sysfs PCI: iommu: iotlb flushing PCI: simplify quirk debug output PCI: iova RB tree setup tweak PCI: parisc: use generic pci_enable_resources() PCI: ppc: use generic pci_enable_resources() PCI: powerpc: use generic pci_enable_resources() PCI: ia64: use generic pci_enable_resources() ...
| * PCI: iommu: iotlb flushingmark gross2008-04-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is for batching up the flushing of the IOTLB for the DMAR implementation found in the Intel VT-d hardware. It works by building a list of to be flushed IOTLB entries and a bitmap list of which DMAR engine they are from. After either a high water mark (250 accessible via debugfs) or 10ms the list of iova's will be reclaimed and the DMAR engines associated are IOTLB-flushed. This approach recovers 15 to 20% of the performance lost when using the IOMMU for my netperf udp stream benchmark with small packets. It can be disabled with a kernel boot parameter "intel_iommu=strict". Its use does weaken the IOMMU protections a bit. Signed-off-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * PCI: remove initial bios sort of PCI devices on x86Greg Kroah-Hartman2008-04-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently keep 2 lists of PCI devices in the system, one in the driver core, and one all on its own. This second list is sorted at boot time, in "BIOS" order, to try to remain compatible with older kernels (2.2 and earlier days). There was also a "nosort" option to turn this sorting off, to remain compatible with even older kernel versions, but that just ends up being what we have been doing from 2.5 days... Unfortunately, the second list of devices is not really ever used to determine the probing order of PCI devices or drivers[1]. That is done using the driver core list instead. This change happened back in the early 2.5 days. Relying on BIOS ording for the binding of drivers to specific device names is problematic for many reasons, and userspace tools like udev exist to properly name devices in a persistant manner if that is needed, no reliance on the BIOS is needed. Matt Domsch and others at Dell noticed this back in 2006, and added a boot option to sort the PCI device lists (both of them) in a breadth-first manner to help remain compatible with the 2.4 order, if needed for any reason. This option is not going away, as some systems rely on them. This patch removes the sorting of the internal PCI device list in "BIOS" mode, as it's not needed at all anymore, and hasn't for many years. I've also removed the PCI flags for this from some other arches that for some reason defined them, but never used them. This should not change the ordering of any drivers or device probing. [1] The old-style pci_get_device and pci_find_device() still used this sorting order, but there are very few drivers that use these functions, as they are deprecated for use in this manner. If for some reason, a driver rely on the order and uses these functions, the breadth-first boot option will resolve any problem. Cc: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | Merge branch 'master' of ↵Linus Torvalds2008-04-21
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (202 commits) [POWERPC] Fix compile breakage for 64-bit UP configs [POWERPC] Define copy_siginfo_from_user32 [POWERPC] Add compat handler for PTRACE_GETSIGINFO [POWERPC] i2c: Fix build breakage introduced by OF helpers [POWERPC] Optimize fls64() on 64-bit processors [POWERPC] irqtrace support for 64-bit powerpc [POWERPC] Stacktrace support for lockdep [POWERPC] Move stackframe definitions to common header [POWERPC] Fix device-tree locking vs. interrupts [POWERPC] Make pci_bus_to_host()'s struct pci_bus * argument const [POWERPC] Remove unused __max_memory variable [POWERPC] Simplify xics direct/lpar irq_host setup [POWERPC] Use pseries_setup_i8259_cascade() in pseries_mpic_init_IRQ() [POWERPC] Turn xics_setup_8259_cascade() into a generic pseries_setup_i8259_cascade() [POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c [POWERPC] Use asm-generic/bitops/find.h in bitops.h [POWERPC] 83xx: mpc8315 - fix USB UTMI Host setup [POWERPC] 85xx: Fix the size of qe muram for MPC8568E [POWERPC] 86xx: mpc86xx_hpcn - Temporarily accept old dts node identifier. [POWERPC] 86xx: mark functions static, other minor cleanups ...
| * \ Merge branch 'linux-2.6'Paul Mackerras2008-04-14
| |\ \
| * | | [POWERPC] Add kernel parameter to set l3cr for MPC745xRobert Brose2008-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Old-world powermacs don't set L2CR or L3CR on processor upgrade cards. This simple patch allows the setting of L3CR via a kernel parameter (like the existing kernel parameter to set L2CR). Signed-off-by: Robert Brose <bob@qbjnet.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | | x86: fix exec mappings commentsJiri Slaby2008-04-19
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | - noexec32 is on by default for years already - add noexec32 to kernel-parameters and fix noexec typo in there Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | | Security: Introduce security= boot parameterAhmed S. Darwish2008-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the security= boot parameter. This is done to avoid LSM registration clashes in case of more than one bult-in module. User can choose a security module to enable at boot. If no security= boot parameter is specified, only the first LSM asking for registration will be loaded. An invalid security module name will be treated as if no module has been chosen. LSM modules must check now if they are allowed to register by calling security_module_enable(ops) first. Modify SELinux and SMACK to do so. Do not let SMACK register smackfs if it was not chosen on boot. Smackfs assumes that smack hooks are registered and the initial task security setup (swapper->security) is done. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Acked-by: James Morris <jmorris@namei.org>
* | | Merge branch 'release' of ↵Linus Torvalds2008-04-18
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (27 commits) [IA64] kdump: Add crash_save_vmcoreinfo for INIT [IA64] Fix NUMA configuration issue [IA64] Itanium Spec updates [IA64] Untangle sync_icache_dcache() page size determination [IA64] arch/ia64/kernel/: use time_* macros [IA64] remove redundant display of free swap space in show_mem() [IA64] make IOMMU respect the segment boundary limits [IA64] kprobes: kprobe-booster for ia64 [IA64] fix getpid and set_tid_address fast system calls for pid namespaces [IA64] Replace explicit jiffies tests with time_* macros. [IA64] use goto to jump out do/while_each_thread [IA64] Fix unlock ordering in smp_callin [IA64] pgd_offset() constfication. [IA64] kdump: crash.c coding style fix [IA64] kdump: add kdump_on_fatal_mca [IA64] Minimize per_cpu reservations. [IA64] Correct pernodesize calculation. [IA64] Kernel parameter for max number of concurrent global TLB purges [IA64] Multiple outstanding ptc.g instruction support [IA64] Implement smp_call_function_mask for ia64 ...
| * \ \ Pull nptcg into release branchTony Luck2008-04-17
| |\ \ \ | | |_|/ | |/| | | | | | | | | | | | | | Conflicts: arch/ia64/mm/tlb.c
| | * | [IA64] Kernel parameter for max number of concurrent global TLB purgesFenghua Yu2008-04-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch defines kernel parameter "nptcg=". The parameter overrides max number of concurrent global TLB purges which is reported from either PAL_VM_SUMMARY or SAL PALO. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds2008-04-18
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (58 commits) ide: remove ide_init_default_irq() macro ide: move default IDE ports setup to ide_generic host driver ide: remove obsoleted "idex=noprobe" kernel parameter (take 2) ide: remove needless hwif->irq check from ide_hwif_configure() ide: init hwif->{io_ports,irq} explicitly in legacy VLB host drivers ide: limit legacy VLB host drivers to alpha, x86 and mips cmd640: init hwif->{io_ports,irq} explicitly cmd640: cleanup setup_device_ptrs() ide: add ide-4drives host driver (take 3) ide: remove ppc ifdef from init_ide_data() ide: remove ide_default_io_ctl() macro ide: remove CONFIG_IDE_ARCH_OBSOLETE_INIT ide: add CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS (take 2) ppc/pmac: remove no longer needed IDE quirk ppc: don't include <linux/ide.h> ppc: remove ppc_ide_md ppc/pplus: remove ppc_ide_md.ide_init_hwif hook ppc/sandpoint: remove ppc_ide_md hooks ppc/lopec: remove ppc_ide_md hooks ppc/mpc8xx: remove ppc_ide_md hooks ...
| * | | | ide: remove obsoleted "idex=noprobe" kernel parameter (take 2)Bartlomiej Zolnierkiewicz2008-04-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Remove obsoleted "idex=noprobe" kernel parameter. * Remove no longer needed hwif->noprobe quirk from ide_hwif_configure() and hwif->noprobe checking from cmd640.c. v2: * "ide?=noprobe" -> "ide?=ata66" in Documentation/kernel-parameters.txt. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| * | | | IDE: remove ide=reverse IDE coreGreg Kroah-Hartman2008-04-17
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This option is obsolete and can be removed safely. It allows us to remove the pci_get_device_reverse() function from the PCI core. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdbLinus Torvalds2008-04-18
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdb: kgdb: always use icache flush for sw breakpoints kgdb: fix SMP NMI kgdb_handle_exception exit race kgdb: documentation fixes kgdb: allow static kgdbts boot configuration kgdb: add documentation kgdb: Kconfig fix kgdb: add kgdb internal test suite kgdb: fix several kgdb regressions kgdb: kgdboc pl011 I/O module kgdb: fix optional arch functions and probe_kernel_* kgdb: add x86 HW breakpoints kgdb: print breakpoint removed on exception kgdb: clocksource watchdog kgdb: fix NMI hangs kgdb: fix kgdboc dynamic module configuration kgdb: document parameters x86: kgdb support consoles: polling support, kgdboc kgdb: core uaccess: add probe_kernel_write()
| * | | | kgdb: document parametersJason Wessel2008-04-17
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | document the kgdboc module/boot parameter. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | x86: memtest bootparamYinghai Lu2008-04-17
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | x86 iommu: add more documentationPavel Machek2008-04-17
|/ / / | | | | | | | | | | | | | | | | | | | | | Fix coding style in pci-dma_64.c and add stubs for documentation. I hope someone fills the rest, I understand maybe off and soft... Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'docs' of git://git.lwn.net/linux-2.6Linus Torvalds2008-04-11
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'docs' of git://git.lwn.net/linux-2.6: Add additional examples in Documentation/spinlocks.txt Move sched-rt-group.txt to scheduler/ Documentation: move rpc-cache.txt to filesystems/ Documentation: move nfsroot.txt to filesystems/ Spell out behavior of atomic_dec_and_lock() in kerneldoc Fix a typo in highres.txt Fixes to the seq_file document Fill out information on patch tags in SubmittingPatches Add the seq_file documentation
| * | | Documentation: move nfsroot.txt to filesystems/J. Bruce Fields2008-04-11
| | |/ | |/| | | | | | | | | | | | | | | | | | | Documentation/ is a little large, and filesystems/ seems an obvious place for this file. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | | cgroups: add cgroup support for enabling controllers at boot timePaul Menage2008-04-04
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The effects of cgroup_disable=foo are: - foo isn't auto-mounted if you mount all cgroups in a single hierarchy - foo isn't visible as an individually mountable subsystem As a result there will only ever be one call to foo->create(), at init time; all processes will stay in this group, and the group will never be mounted on a visible hierarchy. Any additional effects (e.g. not allocating metadata) are up to the foo subsystem. This doesn't handle early_init subsystems (their "disabled" bit isn't set be, but it could easily be extended to do so if any of the early_init systems wanted it - I think it would just involve some nastier parameter processing since it would occur before the command-line argument parser had been run. Hugh said: Ballpark figures, I'm trying to get this question out rather than processing the exact numbers: CONFIG_CGROUP_MEM_RES_CTLR adds 15% overhead to the affected paths, booting with cgroup_disable=memory cuts that back to 1% overhead (due to slightly bigger struct page). I'm no expert on distros, they may have no interest whatever in CONFIG_CGROUP_MEM_RES_CTLR=y; and the rest of us can easily build with or without it, or apply the cgroup_disable=memory patches. Unix bench's execl test result on x86_64 was == just after boot without mounting any cgroup fs.== mem_cgorup=off : Execl Throughput 43.0 3150.1 732.6 mem_cgroup=on : Execl Throughput 43.0 2932.6 682.0 == [lizf@cn.fujitsu.com: fix boot option parsing] Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Sudhir Kumar <skumar@linux.vnet.ibm.com> Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | ACPI PM: Restore the 2.6.24 suspend orderingRafael J. Wysocki2008-04-01
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some time ago it turned out that our suspend code ordering broke some NVidia-based systems that hung if _PTS was executed with one of the PCI devices, specifically a USB controller, in a low power state. Then, it was noticed that the suspend code ordering was not compliant with ACPI 1.0, although it was compliant with ACPI 2.0 (and later), and it was argued that the code had to be changed for that reason (ref. http://bugzilla.kernel.org/show_bug.cgi?id=9528). So we did, but evidently we did wrong, because it's now turning out that some systems have been broken by this change. Refs: http://bugzilla.kernel.org/show_bug.cgi?id=10340 https://bugzilla.novell.com/show_bug.cgi?id=374217#c16 [ I said at that time that something like this might happend, but the majority of people involved thought that it was improbable due to the necessity to preserve the compliance of hardware with ACPI 1.0. ] This actually is a quite serious regression from 2.6.24. Moreover, the ACPI 1.0 ordering of suspend code introduced another issue that I have only noticed recently. Namely, if the suspend of one of devices fails, the already suspended devices will be resumed without executing _WAK before, which leads to problems on some systems (for example, in such situations thermal management is broken on my HP nx6325). Consequently, it also breaks suspend debugging on the affected systems. Note also, that the requirement to execute _PTS before suspending devices does not really make sense, because the device in question may be put into a low power state at run time for a reason unrelated to a system-wide suspend. For the reasons outlined above, the change of the suspend ordering should be reverted, which is done by the patch below. [ Felix Möller: "I am the reporter from the original Novell Bug: https://bugzilla.novell.com/show_bug.cgi?id=374217 I just tried current git head (two hours ago) with the patch (the one from the beginning of this thread) from Rafael and without it. With the patch my MacBook does suspend without it does not." ] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Felix Möller <felix@derklecks.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel-parameters.txt: document memmap option betterPavel Machek2008-03-24
| | | | | | | | | | Provide example for memmap exclude option (it is slightly strange and non-trivial) and provide nice small HOWTO for people with bad memory. Signed-off-by: Jan-Simon Moeller <dl9pf@gmx.de> Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2008-03-18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: ALPS - fix forward/back buttons reversed on Acer 5520-5290 Input: ALPS - put secondary device in proper place in sysfs Input: wacom - add support for Bamboo1, BambooFun, and Cintiq 12WX Input: document i8042.noloop Input: add keyboard notifier documentation Input: ads7846 - fix uninitialized var warning Input: i8042 - add SNI RM support Input: i8042 - add Lenovo 3000 N100 to nomux blacklist Input: i8042 - fix warning on non-x86 builds Input: cobalt_btns - assorted fixes
| * Input: document i8042.noloopJiri Kosina2008-03-14
| | | | | | | | | | | | | | | | Document 'noloop' kernel parameter of i8042 controller driver. Pointed out in #10236. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
* | ACPI: Remove ACPI_CUSTOM_DSDT_INITRD optionLinus Torvalds2008-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This essentially reverts commit 71fc47a9adf8ee89e5c96a47222915c5485ac437 ("ACPI: basic initramfs DSDT override support"), because the code simply isn't ready. It did ugly things to the init sequence to populate the rootfs image early, but that just ended up showing other problems with the whole approach. The fact is, the VFS layer simply isn't initialized this early, and the relevant ACPI code should either run much later, or this shouldn't be done at all. For 2.6.25, we'll just pick the latter option. We can revisit this concept later if necessary. Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Renninger <trenn@suse.de> Cc: Eric Piel <eric.piel@tremplin-utc.net> Cc: Len Brown <len.brown@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Markus Gaugusch <dsdt@gaugusch.at> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | documentation: Move power-related files to Documentation/power/Randy Dunlap2008-03-12
|/ | | | | | | | | | | | Move 00-INDEX entries to power/00-INDEX (and add entry for pm_qos_interface.txt). Update references to moved filenames. Fix some trailing whitespace. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ide: update references to Documentation/ide/ide.txt (v2)Randy Dunlap2008-03-07
| | | | | | | | Fix all references to Documentation/ide/ide.txt. Add/update ide/00-INDEX file. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* libata: implement libata.force module parameterTejun Heo2008-02-20
| | | | | | | | | | | | | | | | This patch implements libata.force module parameter which can selectively override ATA port, link and device configurations including cable type, SATA PHY SPD limit, transfer mode and NCQ. For example, you can say "use 1.5Gbps for all fan-out ports attached to the second port but allow 3.0Gbps for the PMP device itself, oh, the device attached to the third fan-out port chokes on NCQ and shouldn't go over UDMA4" by the following. libata.force=2:1.5g,2.15:3.0g,2.03:noncq,udma4 Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* remove mca-pentiumAdrian Bunk2008-02-19
| | | | | | | | | | | | | | | This patch removes the mca-pentium boot option that was a noop. besides the source code cleanup factor, this saves some text as well: arch/x86/kernel/cpu/bugs.o: text data bss dec hex filename 651 77 4 732 2dc bugs.o.before 631 53 4 688 2b0 bugs.o.after Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* The scheduled 'time' option removalAdrian Bunk2008-02-08
| | | | | | | | | The scheduled removal of the 'time' option. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branches 'release' and 'dsdt-override' into releaseLen Brown2008-02-07
|\
| * ACPI: Add "acpi_no_initrd_override" kernel parameterÉric Piel2008-02-07
| | | | | | | | | | | | | | | | The acpi_no_initrd_override parameter permits to disable the load of an ACPI table from the initramfs. Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Len Brown <len.brown@intel.com>
* | PM: documentation cleanupsPavel Machek2008-02-07
|/ | | | | | Signed-off-by: Pavel Machek <pavel@suse.cz> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* ide-pci-generic: kill the unused ifdef/endif/MODULE codeDenis Cheng2008-02-05
| | | | | | | | | | | | | | | with module_param macro, the __setup code can be killed now: const __setup("all-generic-ide", ide_generic_all_on); and the module name "generic.ko" is not descriptive to its functionality, can be changed in Makefile, the "ide-pci-generic.ko" is better. the ide-pci-generic.all-generic-ide parameter also documented in Documentation/kernel-parameters.txt Signed-off-by: Denis Cheng <crquan@gmail.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
* Documentation: Remove references to dead "st0x" and "tmc8xx" parms.Robert P. J. Day2008-02-03
| | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* Documentation: Update to refer to correct "rcupdate" module nameRobert P. J. Day2008-02-03
| | | | | Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Adrian Bunk <bunk@kernel.org>
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