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 <thockin@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
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>
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>
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 <bwalle@suse.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Alon Bar-Lev <alon.barlev@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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 <ak@suse.de>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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 <ak@suse.de>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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 <ak@suse.de>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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 <ak@suse.de>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Paul Jackson <pj@sgi.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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 <johannes@sipsolutions.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: <linux-pm@lists.linux-foundation.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Len Brown <lenb@kernel.org>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (107 commits)
smc911x: fix compilation breakage wjen debug is on
[netdrvr] eexpress: minor corrections
add NAPI support to sb1250-mac.c
ixgb: ROUND_UP macro cleanup in drivers/net/ixgb
e1000: ROUND_UP macro cleanup in drivers/net/e1000
Generic HDLC sparse annotations
e100: Optionally use I/O mode only to access register space
e100: allow bad MAC address when running with invalid eeprom csum
ehea: fix for dlpar support
ehea: fix for sysfs entries
3C509: Remove unnecessary include of <linux/pm_legacy.h>
NetXen: Fix for vmalloc issues
NetXen: Fixes for Power PC architecture
NetXen: Port swap feature for multi port cards
NetXen: Removal of redundant macros
NetXen: Multi PCI support for Quad cards
NetXen: Removal of redundant argument passing
NetXen: Use multiple PCI functions
[netdrvr e100] experiment with doing RX in a similar manner to eepro100
[PATCH] ieee80211: add missing global needed by IEEE80211_DEBUG_XXXX
...
* '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
...
Change sonypi_camera_command() calls to sony_pic_camera_command() and use
the renamed macros.
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
Add support to sysfs to the wan and bluetooth subdrivers.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Improve fan control documentation and fix one mistake.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown considers that an active by default fan control interface in
laptops may be too close to giving users enough rope. There is a good
chance he is quite correct on this, especially if someone decides to use
that interface in applets and users are not aware of its risks.
This patch adds a master switch to thinkpad-acpi that enables or disables
the entire fan-control feature as a module parameter: "fan_control". It
defaults to disabled. Set it to non-zero to enable fan control.
Also, the patch removes the expermiental status from fan control, since it
is stable enough to not be called experimental, and the master switch makes
it safe enough to do so.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Convert function documentation in drivers/net/phy/ to kernel-doc
and add it to DocBook.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
The in-kernel documentation of the bcm43xx driver is out of date.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (78 commits)
USB: update MAINAINERS and CREDITS for Freescale USB driver
USB: update gadget files for fsl_usb2_udc driver
USB: add Freescale high-speed USB SOC device controller driver
USB: quirk for broken suspend of IT8152F/G
USB: iowarrior.c: timeouts too small in usb_control_msg calls
USB: dell device id for option.c
USB: Remove Huawei unusual_devs entry
USB: CP2101 New Device IDs
USB: add picdem device to ldusb
usbfs micro optimitation
USB: remove ancient/broken CRIS hcd
usb ethernet gadget, workaround network stack API glitch
USB: add "busnum" attribute for USB devices
USB: cxacru: ADSL state management
usbatm: Detect usb device shutdown and ignore failed urbs
USB: Remove duplicate define of OHCI_QUIRK_ZFMICRO
USB: BandRich BandLuxe HSDPA Data Card Driver
USB gadget rndis: fix struct rndis_packet_msg_type unaligned bug
USB Elan FTDI: check for driver registration status
USB: sierra: add more checks on shutdown
...
* 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb: (184 commits)
V4L/DVB (5563): Radio-maestro.c Replace radio_ioctl to use video_ioctl2
V4L/DVB (5562): Radio-gemtek-pci.c Replace gemtek_pci_ioctl to use video_ioctl2
V4L/DVB (5560): Ivtv: fix incorrect bitwise-and for command flags.
V4L/DVB (5558): Opera: use 7-bit i2c addresses
V4L/DVB (5557): Cafe_ccic: check return value of pci_enable_device
V4L/DVB (5556): Radio-gemtek.c Replace gemtek_ioctl to use video_ioctl2
V4L/DVB (5555): Radio-aimslab.c Replace rt_ioctl to use video_ioctl2
V4L/DVB (5554): Fix: vidioc_g_parm were not zeroing the memory
V4L/DVB (5553): Replace typhoon_do_ioctl to use video_ioctl2
V4L/DVB (5552): Plan-b: Switch to refcounting PCI API
V4L/DVB (5551): Plan-b: header change
V4L/DVB (5550): Radio-sf16fmi.c Replace fmi_do_ioctl to use video_ioctl2
V4L/DVB (5549): Radio-sf16fmr2.c Replace fmr2_do_ioctl to use video_ioctl2
V4L/DVB (5548): Fix v4l2 buffer to the length
V4L/DVB (5547): Add ENUM_FRAMESIZES and ENUM_FRAMEINTERVALS ioctls
V4L/DVB (5546): Radio-terratec.c Replace tt_do_ioctl to use video_ioctl2
V4L/DVB (5545): Saa7146: Release capture buffers on device close
V4L/DVB (5544): Budget-av: Make inversion setting configurable, add KNC ONE V1.0 card
V4L/DVB (5543): Tda10023: Add support for frontend TDA10023
V4L/DVB (5542): Budget-av: Remove polarity switching of the clock for DVB-C
...
This patch (as874) adds another piece to the user-visible part of the
USB autosuspend interface. The new power/level sysfs attribute allows
users to force the device on (with autosuspend off), force the device
to sleep (with autoresume off), or return to normal automatic operation.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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>
This patch adds a new text API, codenamed '1u', which captures more URB
fields than old '1t' interface did. Also the '1u' text API is compatible
with the future "bus zero" extension.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
usbvision has a module parameter that ables the user to add a new USB
entry at driver load. This functionality is useless by experience
(adding statically the entry is easy).
Furthermore, the USB_DEVICE(0xfff0, 0xfff0) USB entry caused
usbvision_probe to be called for all unclaimed devices.
Signed-off-by: Thierry MERLE <thierry.merle@free.fr>
Acked-by: Dwaine Garden <DwaineGarden@rogers.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Changed usbvision cards table to allow:
1) Not repeat USB ID on two structs;
2) Not need to specify both usb and card description tables at
the same order, removing some magic;
Some cards had duplicated names. Fixed.
A test for an specific board were doing by using a string comparation.
The comparation were wrong. Also, it is not a good practice to recognize
a board based on his string name.
Acked-by: Thierry MERLE <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
SSAI (www.ssai.us) makes several Bt878-based capture cards that get used in our
surveillance, conferencing, and medical imaging systems. The attached
relatively small patch adds support for these cards, which fall into two broad
* boards with one or more Bt878s, one or more composite inputs, and no S-video
or tuner inputs
* boards with one Bt878, one composite input, one S-video input, and no tuner
input
Signed-off-by: Scott Alfter <salfter@ssai.us>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
@ Don't assume that SOF headers can't cross packets boundaries
@ Fix compression quality selection
+ Add support for MI-0360 image sensor
* Documentation updates
@ Fix sysfs
@ MI0343 rewritten
* HV7131R color fixes and add new ABLC control
* Rename the archive from "sn9c102" to "sn9c1xx"
* fix typos
* better support for TAS5110D
@ fix OV7630 wrong colors
@ Don't return an error if no input buffers are enqueued yet on VIDIOC_STREAMON
* Add informations about colorspaces
* More appropriate error codes in case of failure of some system calls
* More precise hardware detection
* Add more informations about supported hardware in the documentation
+ More supported devices
+ Add support for HV7131R image sensor
Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The new name fits to what it is and what is on the box.
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
There are 2 new entries for p7131 boards and one correction for a board
with LNA.
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Adds more osd mode switching information.
Corrects some information regarding mode selection & local alpha operation for
16 bit modes.
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The ADS Tech InstantTV DVB-S is a clone of the KWorld DVB-S 100.
This patch adds autodetection support for this card based on
pci subsystem id.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Those two experimental APIs never worked fine nor, afaik, were
implemented at the apps. Their functionalities were implemented by other
means.
So, let's remove those obsolete stuff.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
The documentation of Several miscellaneous commands was updated.
As a result of which the CX2341X_ENC_UNKNOWN command was renamed to
CX2341X_ENC_SET_VERT_CROP_LINE.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
It is a Lifeview Duo with a different ID
Signed-off-by: Peter Missel <peter.missel@onlinehome.de>
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This patch contains
- new tuning code for the tda827xa silicon tuner.
- controls the preamplifier of some boards with this tuner.
- support for the Philips Tiger S hybrid DVB-T reference design.
- reworked the saa7134-dvb modulue to get rid of most of the
small board specific functions.
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This patch adds a V4L2 driver giving support for USB webcams based on the
zr364xx chipsets.
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This patch contains the overdue removal of the mount/umount uevents.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: (49 commits)
IB: Set class_dev->dev in core for nice device symlink
IB/ehca: Implement modify_port
IB/umad: Clarify documentation of transaction ID
IPoIB/cm: spin_lock_irqsave() -> spin_lock_irq() replacements
IB/mad: Change SMI to use enums rather than magic return codes
IB/umad: Implement GRH handling for sent/received MADs
IB/ipoib: Use ib_init_ah_from_path to initialize ah_attr
IB/sa: Set src_path_bits correctly in ib_init_ah_from_path()
IB/ucm: Simplify ib_ucm_event()
RDMA/ucma: Simplify ucma_get_event()
IB/mthca: Simplify CQ cleaning in mthca_free_qp()
IB/mthca: Fix mthca_write_mtt() on HCAs with hidden memory
IB/mthca: Update HCA firmware revisions
IB/ipath: Fix WC format drift between user and kernel space
IB/ipath: Check that a UD work request's address handle is valid
IB/ipath: Remove duplicate stuff from ipath_verbs.h
IB/ipath: Check reserved memory keys
IB/ipath: Fix unit selection when all CPU affinity bits set
IB/ipath: Don't allow QPs 0 and 1 to be opened multiple times
IB/ipath: Disable IB link earlier in shutdown sequence
...
