08 May, 2007
2 commits
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Adds /proc/pid/clear_refs. When any non-zero number is written to this file,
pte_mkold() and ClearPageReferenced() is called for each pte and its
corresponding page, respectively, in that task's VMAs. This file is only
writable by the user who owns the task.It is now possible to measure _approximately_ how much memory a task is using
by clearing the reference bits withecho 1 > /proc/pid/clear_refs
and checking the reference count for each VMA from the /proc/pid/smaps output
at a measured time interval. For example, to observe the approximate change
in memory footprint for a task, write a script that clears the references
(echo 1 > /proc/pid/clear_refs), sleeps, and then greps for Pgs_Referenced and
extracts the size in kB. Add the sizes for each VMA together for the total
referenced footprint. Moments later, repeat the process and observe the
difference.For example, using an efficient Mozilla:
accumulated time referenced memory
---------------- -----------------
0 s 408 kB
1 s 408 kB
2 s 556 kB
3 s 1028 kB
4 s 872 kB
5 s 1956 kB
6 s 416 kB
7 s 1560 kB
8 s 2336 kB
9 s 1044 kB
10 s 416 kBThis is a valuable tool to get an approximate measurement of the memory
footprint for a task.Cc: Hugh Dickins
Cc: Paul Mundt
Cc: Christoph Lameter
Signed-off-by: David Rientjes
[akpm@linux-foundation.org: build fixes]
[mpm@selenic.com: rename for_each_pmd]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
PCI drivers have the new_id file in sysfs which allows new IDs to be added
at runtime. The advantage is to avoid re-compilation of a driver that
works for a new device, but it's ID table doesn't contain the new device.
This mechanism is only meant for testing, after the driver has been tested
successfully, the ID should be added in source code so that new revisions
of the kernel automatically detect the device.The implementation follows the PCI implementation. The interface is documented
in Documentation/pcmcia/driver.txt. Computations should be done in userspace,
so the sysfs string contains the raw structure members for matching.Signed-off-by: Bernhard Walle
Cc: Dominik Brodowski
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 May, 2007
2 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (38 commits)
kconfig: fix mconf segmentation fault
kbuild: enable use of code from a different dir
kconfig: error out if recursive dependencies are found
kbuild: scripts/basic/fixdep segfault on pathological string-o-death
kconfig: correct minor typo in Kconfig warning message.
kconfig: fix path to modules.txt in Kconfig help
usr/Kconfig: fix typo
kernel-doc: alphabetically-sorted entries in index.html of 'htmldocs'
kbuild: be more explicit on missing .config file
kbuild: clarify the creation of the LOCALVERSION_AUTO string.
kbuild: propagate errors from find in scripts/gen_initramfs_list.sh
kconfig: refer to qt3 if we cannot find qt libraries
kbuild: handle compressed cpio initramfs-es
kbuild: ignore section mismatch warning for references from .paravirtprobe to .init.text
kbuild: remove stale comment in modpost.c
kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE
kbuild: fix make mrproper for Documentation/DocBook/man
kbuild: remove kconfig binaries during make mrproper
kconfig/menuconfig: do not hardcode '.config'
kbuild: override build timestamp & version
... -
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (82 commits)
[ARM] Add comments marking in-use ptrace numbers
[ARM] Move syscall saving out of the way of utrace
[ARM] 4360/1: S3C24XX: regs-udc.h remove unused macro
[ARM] 4358/1: S3C24XX: mach-qt2410.c: remove linux/mmc/protocol.h header
[ARM] mm 10: allow memory type to be specified with ioremap
[ARM] mm 9: add additional device memory types
[ARM] mm 8: define mem_types table L1 bit 4 to be for ARMv6
[ARM] iop: add missing parens in macro
[ARM] mm 7: remove duplicated __ioremap() prototypes
ARM: OMAP: fix OMAP1 mpuio suspend/resume oops
ARM: OMAP: MPUIO wake updates
ARM: OMAP: speed up gpio irq handling
ARM: OMAP: plat-omap changes for 2430 SDP
ARM: OMAP: gpio object shrinkage, cleanup
ARM: OMAP: /sys/kernel/debug/omap_gpio
ARM: OMAP: Implement workaround for GPIO wakeup bug in OMAP2420 silicon
ARM: OMAP: Enable 24xx GPIO autoidling
[ARM] 4318/2: DSM-G600 Board Support
[ARM] 4227/1: minor head.S fixups
[ARM] 4328/1: Move i.MX UART regs to driver
...
06 May, 2007
2 commits
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* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (231 commits)
[PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall
[PATCH] i386: type may be unused
[PATCH] i386: Some additional chipset register values validation.
[PATCH] i386: Add missing !X86_PAE dependincy to the 2G/2G split.
[PATCH] x86-64: Don't exclude asm-offsets.c in Documentation/dontdiff
[PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu
[PATCH] i386: white space fixes in i387.h
[PATCH] i386: Drop noisy e820 debugging printks
[PATCH] x86-64: Fix allnoconfig error in genapic_flat.c
[PATCH] x86-64: Shut up warnings for vfat compat ioctls on other file systems
[PATCH] x86-64: Share identical video.S between i386 and x86-64
[PATCH] x86-64: Remove CONFIG_REORDER
[PATCH] x86-64: Print type and size correctly for unknown compat ioctls
[PATCH] i386: Remove copy_*_user BUG_ONs for (size < 0)
[PATCH] i386: Little cleanups in smpboot.c
[PATCH] x86-64: Don't enable NUMA for a single node in K8 NUMA scanning
[PATCH] x86: Use RDTSCP for synchronous get_cycles if possible
[PATCH] i386: Add X86_FEATURE_RDTSCP
[PATCH] i386: Implement X86_FEATURE_SYNC_RDTSC on i386
[PATCH] i386: Implement alternative_io for i386
...Fix up trivial conflict in include/linux/highmem.h manually.
Signed-off-by: Linus Torvalds
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* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (87 commits)
[SCSI] fusion: fix domain validation loops
[SCSI] qla2xxx: fix regression on sparc64
[SCSI] modalias for scsi devices
[SCSI] sg: cap reserved_size values at max_sectors
[SCSI] BusLogic: stop using check_region
[SCSI] tgt: fix rdma transfer bugs
[SCSI] aacraid: fix aacraid not finding device
[SCSI] aacraid: Correct SMC products in aacraid.txt
[SCSI] scsi_error.c: Add EH Start Unit retry
[SCSI] aacraid: [Fastboot] Panics for AACRAID driver during 'insmod' for kexec test.
[SCSI] ipr: Driver version to 2.3.2
[SCSI] ipr: Faster sg list fetch
[SCSI] ipr: Return better qc_issue errors
[SCSI] ipr: Disrupt device error
[SCSI] ipr: Improve async error logging level control
[SCSI] ipr: PCI unblock config access fix
[SCSI] ipr: Fix for oops following SATA request sense
[SCSI] ipr: Log error for SAS dual path switch
[SCSI] ipr: Enable logging of debug error data for all devices
[SCSI] ipr: Add new PCI-E IDs to device table
...
05 May, 2007
6 commits
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* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input: (65 commits)
Input: gpio_keys - add support for switches (EV_SW)
Input: cobalt_btns - convert to use polldev library
Input: add skeleton for simple polled devices
Input: update some documentation
Input: wistron - fix typo in keymap for Acer TM610
Input: add input_set_capability() helper
Input: i8042 - add Fujitsu touchscreen/touchpad PNP IDs
Input: i8042 - add Panasonic CF-29 to nomux list
Input: lifebook - split into 2 devices
Input: lifebook - add signature of Panasonic CF-29
Input: lifebook - activate 6-byte protocol on select models
Input: lifebook - work properly on Panasonic CF-18
Input: cobalt buttons - separate device and driver registration
Input: ati_remote - make button repeat sensitivity configurable
Input: pxa27x - do not use deprecated SA_INTERRUPT flag
Input: ucb1400 - make delays configurable
Input: misc devices - switch to using input_dev->dev.parent
Input: joysticks - switch to using input_dev->dev.parent
Input: touchscreens - switch to using input_dev->dev.parent
Input: mice - switch to using input_dev->dev.parent
...Fixed up conflicts with core device model removal of "struct subsystem" manually.
Signed-off-by: Linus Torvalds
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* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
remove "struct subsystem" as it is no longer needed
sysfs: printk format warning
DOC: Fix wrong identifier name in Documentation/driver-model/devres.txt
platform: reorder platform_device_del
Driver core: fix show_uevent from taking up way too much stack -
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (59 commits)
PCI: Free resource files in error path of pci_create_sysfs_dev_files()
pci-quirks: disable MSI on RS400-200 and RS480
PCI hotplug: Use menuconfig objects
PCI: ZT5550 CPCI Hotplug driver fix
PCI: rpaphp: Remove semaphores
PCI: rpaphp: Ensure more pcibios_add/pcibios_remove symmetry
PCI: rpaphp: Use pcibios_remove_pci_devices() symmetrically
PCI: rpaphp: Document is_php_dn()
PCI: rpaphp: Document find_php_slot()
PCI: rpaphp: Rename rpaphp_register_pci_slot() to rpaphp_enable_slot()
PCI: rpaphp: refactor tail call to rpaphp_register_slot()
PCI: rpaphp: remove rpaphp_set_attention_status()
PCI: rpaphp: remove print_slot_pci_funcs()
PCI: rpaphp: Remove setup_pci_slot()
PCI: rpaphp: remove a call that does nothing but a pointer lookup
PCI: rpaphp: Remove another wrappered function
PCI: rpaphp: Remve another call that is a wrapper
PCI: rpaphp: remove a function that does nothing but wrap debug printks
PCI: rpaphp: Remove un-needed goto
PCI: rpaphp: Fix a memleak; slot->location string was never freed
... -
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: (44 commits)
i2c-s3c2410: Fix bug in releasing driver
i2c-s3c2410: Fix I2C SDA to SCL setup time
i2c: New i2c-tiny-usb bus driver
i2c: Documentation update
i2c: SPIN_LOCK_UNLOCKED cleanup
i2c: Obsolete i2c-ixp2000, i2c-ixp4xx and scx200_i2c
i2c: New Simtec I2C bus driver
i2c: Bitbanging I2C bus driver using the GPIO API
Use menuconfig objects - I2C
i2c: Restore i2c_smbus_read_block_data
i2c-pxa: Clean transaction stop
i2c-algo-bit: Improve debugging
i2c-algo-bit: Implement a 50/50 SCL duty cycle
i2c-omap: Switch to static adapter numbering
i2c: Blackfin Two Wire Interface driver
i2c-algo-sgi: Comment and whitespace cleanups
i2c: Make i2c_del_driver a void function
i2c: Move i2c-isa-only exported symbol declarations
i2c: Document i2c_new_device()
i2c: Add i2c_new_probed_device()
...Fixed trivial conflict in Documentation/feature-removal-schedule.txt manually.
Signed-off-by: Linus Torvalds
-
I am no longer with CTI. The Support Department will handle all
inquiries regarding the WH.Signed-off-by: Stuart MacDonald
Signed-off-by: Linus Torvalds -
These helper functions are a leftover from 2.4 sync I/O and are a
notorious source for bugs. They lead to device driver specific code
creeping into cio, and some issues can't really be fixed at all.Device drivers can easily implement those functions themselves in a
more robust manner, so let's get rid of them.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
03 May, 2007
19 commits
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Unless we finally completely remove it, people will always add new users.
Signed-off-by: Adrian Bunk
Signed-off-by: Greg Kroah-Hartman -
This patch removes the PCI_MULTITHREAD_PROBE option that had already
been marked as broken.Signed-off-by: Adrian Bunk
Signed-off-by: Greg Kroah-Hartman -
Correct function name copy-paste error.
Signed-off-by: Randy Dunlap
Signed-off-by: Greg Kroah-Hartman -
Currently, there is no minimum number of fields required when adding
a new device ID to a PCI driver through the new_id sysfs file. It is
possible to add a new ID with only the vendor ID set, causing the
driver to attempt to attach to all PCI devices from that vendor. This
has been reported to happen accidentally:
http://lists.lm-sensors.org/pipermail/lm-sensors/2007-March/019366.html
It is even possible to not even set the vendor ID field, causing the
driver to attempt to attach to _all_ the PCI devices.This sounds dangerous and I fail to see any valid use of this
"feature". Thus I suggest that we now require at least the first two
fields (vendor ID and device ID) to be set. For what it's worth, this
is what the USB subsystem does.Signed-off-by: Jean Delvare
Signed-off-by: Greg Kroah-Hartman -
Above and below we talk about my_midlayer_create_something, I assume that is
also meant here.Signed-off-by: Rolf Eike Beer
Signed-off-by: Tejun Heo
Signed-off-by: Greg Kroah-Hartman -
Make docbook index.html contain sorted output.
I prefer to let the computer do it. This also avoids
people not reading the comment(s).Signed-off-by: Randy Dunlap
Signed-off-by: Sam Ravnborg -
"make mandocs" generate > 2000 files in Documentation/DocBook/man
and this caused kbuild to barf out during make mrproper like this:make -f scripts/Makefile.clean obj=Documentation/DocBook
make -f scripts/Makefile.clean obj=Documentation/DocBook/man/
make[2]: execvp: /bin/sh: Argument list too long
make[2]: *** [__clean] Error 127
make[1]: *** [Documentation/DocBook/man/] Error 2
make: *** [_mrproper_Documentation/DocBook] Error 2The man directory were solely used for output
so the fix is to remove it entirely during the
make mrproper process.Signed-off-by: Sam Ravnborg
Acked-by: Randy Dunlap -
The Makefile fragment in Documentation/kbuild/modules.txt looks to be
missing some braces.Signed-off-by: Anton Blanchard
Signed-off-by: Sam Ravnborg -
asm-offsets.c is valid source code and needs to be diffed.
Signed-off-by: Andi Kleen
-
Background:
We've found that MCEs (specifically DRAM SBEs) tend to come in bunches,
especially when we are trying really hard to stress the system out. The
current MCE poller uses a static interval which does not care whether it
has or has not found MCEs recently.Description:
This patch makes the MCE poller adjust the polling interval dynamically.
If we find an MCE, poll 2x faster (down to 10 ms). When we stop finding
MCEs, poll 2x slower (up to check_interval seconds). The check_interval
tunable becomes the max polling interval. The "Machine check events
logged" printk() is rate limited to the check_interval, which should be
identical behavior to the old functionality.Result:
If you start to take a lot of correctable errors (not exceptions), you
log them faster and more accurately (less chance of overflowing the MCA
registers). If you don't take a lot of errors, you will see no change.Alternatives:
I considered simply reducing the polling interval to 10 ms immediately
and keeping it there as long as we continue to find errors. This felt a
bit heavy handed, but does perform significantly better for the default
check_interval of 5 minutes (we're using a few seconds when testing for
DRAM errors). I could be convinced to go with this, if anyone felt it
was not too aggressive.Testing:
I used an error-injecting DIMM to create lots of correctable DRAM errors
and verified that the polling interval accelerates. The printk() only
happens once per check_interval seconds.Patch:
This patch is against 2.6.21-rc7.Signed-Off-By: Tim Hockin
Signed-off-by: Andi Kleen -
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
-
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 -
Because the command line is increased to 2048 characters after 2.6.21, it's
not possible for boot loaders and userspace tools to determine the length
of the command line the kernel can understand. The benefit of knowing the
length is that users can be warned if the command line size is too long
which prevents surprise if things don't work after bootup.This patch updates the boot protocol to contain a field called
"cmdline_size" that contain the length of the command line (excluding the
terminating zero).The patch also adds missing fields (of protocol version 2.05) to the x86_64
setup code.Signed-off-by: Bernhard Walle
Signed-off-by: Andi Kleen
Cc: Alon Bar-Lev
Acked-by: H. Peter Anvin
Cc: Andi Kleen
Signed-off-by: Andrew Morton -
Create a document to explain how to use numa=fake in conjunction with cpusets
for coarse memory resource management.An attempt to get more awareness and testing for this feature.
Cc: Andi Kleen
Signed-off-by: David Rientjes
Signed-off-by: Andi Kleen
Cc: Paul Jackson
Cc: Christoph Lameter
Signed-off-by: Andrew Morton -
Extends the numa=fake x86_64 command-line option to split the remaining system
memory into nodes of fixed size. Any leftover memory is allocated to a final
node unless the command-line ends with a comma.For example:
numa=fake=2*512,*128 gives two 512M nodes and the remaining system
memory is split into nodes of 128M each.This is beneficial for systems where the exact size of RAM is unknown or not
necessarily relevant, but the size of the remaining nodes to be allocated is
known based on their capacity for resource management.Cc: Andi Kleen
Signed-off-by: David Rientjes
Signed-off-by: Andi Kleen
Cc: Paul Jackson
Cc: Christoph Lameter
Signed-off-by: Andrew Morton -
Extends the numa=fake x86_64 command-line option to split the remaining
system memory into equal-sized nodes.For example:
numa=fake=2*512,4* gives two 512M nodes and the remaining system
memory is split into four approximately equal
chunks.This is beneficial for systems where the exact size of RAM is unknown or not
necessarily relevant, but the granularity with which nodes shall be allocated
is known.Cc: Andi Kleen
Signed-off-by: David Rientjes
Signed-off-by: Andi Kleen
Cc: Paul Jackson
Cc: Christoph Lameter
Signed-off-by: Andrew Morton -
Extends the numa=fake x86_64 command-line option to allow for configurable
node sizes. These nodes can be used in conjunction with cpusets for coarse
memory resource management.The old command-line option is still supported:
numa=fake=32 gives 32 fake NUMA nodes, ignoring the NUMA setup of the
actual machine.But now you may configure your system for the node sizes of your choice:
numa=fake=2*512,1024,2*256
gives two 512M nodes, one 1024M node, two 256M nodes, and
the rest of system memory to a sixth node.The existing hash function is maintained to support the various node sizes
that are possible with this implementation.Each node of the same size receives roughly the same amount of available
pages, regardless of any reserved memory with its address range. The total
available pages on the system is calculated and divided by the number of equal
nodes to allocate. These nodes are then dynamically allocated and their
borders extended until such time as their number of available pages reaches
the required size.Configurable node sizes are recommended when used in conjunction with cpusets
for memory control because it eliminates the overhead associated with scanning
the zonelists of many smaller full nodes on page_alloc().Cc: Andi Kleen
Signed-off-by: David Rientjes
Signed-off-by: Andi Kleen
Cc: Paul Jackson
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
02 May, 2007
7 commits
-
Make the documentation on how to write and port i2c drivers more in
line with the current state of things:
* i2c-isa is deprecated and soon gone, so stop advertising it.
* Drop many sensors-specific references. Most of them were outdated
anyway.
* Update the example code to reflect the recent and not-so-recent
API and coding style preference changes.
* Simplify the example init and cleanup functions.This should make things less complex to understand for newcomers.
Signed-off-by: Jean Delvare
-
The new generic i2c-gpio driver should be used instead.
The obsolete drivers will be removed in September 2007.Signed-off-by: Jean Delvare
Cc: Deepak Saxena
Cc: Jordan Crouse -
Make i2c_del_driver a void function, like all other driver removal
functions. It always returned 0 even when errors occured, and nobody
ever actually checked the return value anyway. And we cannot fail
a module removal anyway.Signed-off-by: Jean Delvare
-
Document the new i2c_new_device(), i2c_new_probed_device() and
i2c_unregister_device() functions.Signed-off-by: Jean Delvare
-
Update Documentation/i2c to match previous patches updating probe()
and remove() logic.Signed-off-by: David Brownell
Signed-off-by: Jean Delvare -
Signed-off-by: Jean Delvare
Cc: Hans-Frieder Vogt -
Kill i2c_adapter.class_dev. Instead, set the class of i2c_adapter.dev
to i2c_adapter_class, so that a symlink will be created for every
i2c_adapter in /sys/class/i2c-adapter.The same change must be mirrored to i2c-isa as it duplicates some
of the i2c-core functionalities.User-space tools and libraries might need some adjustments. In
particular, libsensors from lm_sensors 2.10.3 or later is required for
proper discovery of i2c adapter names after this change.Signed-off-by: Jean Delvare
01 May, 2007
2 commits
-
Conflicts:
drivers/usb/input/Makefile
drivers/usb/input/gtco.c -
This patch removes the firmware disk suspend mode which is the wrong approach,
it is supposed to be used for implementing firmware-based disk suspend but
cannot actually be used for that.Signed-off-by: Johannes Berg
Acked-by: Pavel Machek
Cc:
Cc: David Brownell
Cc: Len Brown
Acked-by: Russell King
Cc: Greg KH
Cc: "Rafael J. Wysocki"
Cc: Paul Mundt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
