Currently we consider a sched domain to be well balanced when the imbalance
is less than the domain's imablance_pct. As the number of cores and threads
are increasing, current values of imbalance_pct (for example 25% for a
NUMA domain) are not enough to detect imbalances like:
a) On a WSM-EP system (two sockets, each having 6 cores and 12 logical threads),
24 cpu-hogging tasks get scheduled as 13 on one socket and 11 on another
socket. Leading to an idle HT cpu.
b) On a hypothetial 2 socket NHM-EX system (each socket having 8 cores and
16 logical threads), 16 cpu-hogging tasks can get scheduled as 9 on one
socket and 7 on another socket. Leaving one core in a socket idle
whereas in another socket we have a core having both its HT siblings busy.
While this issue can be fixed by decreasing the domain's imbalance_pct
(by making it a function of number of logical cpus in the domain), it
can potentially cause more task migrations across sched groups in an
overloaded case.
Fix this by using imbalance_pct only during newly_idle and busy
load balancing. And during idle load balancing, check if there
is an imbalance in number of idle cpu's across the busiest and this
sched_group or if the busiest group has more tasks than its weight that
the idle cpu in this_group can pull.
Reported-by: Nikhil Rao <ncrao@google.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1284760952.2676.11.camel@sbsiddha-MOBL3.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This patch corrects time tracking in samples. Without this patch
both time_enabled and time_running are bogus when user asks for
PERF_SAMPLE_READ.
One uses PERF_SAMPLE_READ to sample the values of other counters
in each sample. Because of multiplexing, it is necessary to know
both time_enabled, time_running to be able to scale counts correctly.
In this second version of the patch, we maintain a shadow
copy of ctx->time which allows us to compute ctx->time without
calling update_context_time() from NMI context. We avoid the
issue that update_context_time() must always be called with
ctx->lock held.
We do not keep shadow copies of the other event timings
because if the lead event is overflowing then it is active
and thus it's been scheduled in via event_sched_in() in
which case neither tstamp_stopped, tstamp_running can be modified.
This timing logic only applies to samples when PERF_SAMPLE_READ
is used.
Note that this patch does not address timing issues related
to sampling inheritance between tasks. This will be addressed
in a future patch.
With this patch, the libpfm4 example task_smpl now reports
correct counts (shown on 2.4GHz Core 2):
$ task_smpl -p 2400000000 -e unhalted_core_cycles:u,instructions_retired:u,baclears noploop 5
noploop for 5 seconds
IIP:0x000000004006d6 PID:5596 TID:5596 TIME:466,210,211,430 STREAM_ID:33 PERIOD:2,400,000,000 ENA=1,010,157,814 RUN=1,010,157,814 NR=3
2,400,000,254 unhalted_core_cycles:u (33)
2,399,273,744 instructions_retired:u (34)
53,340 baclears (35)
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <4cc6e14b.1e07e30a.256e.5190@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The WM8350 driver was using some custom constants to interpret the direction
of the MCLK signal which had the opposite values to those used as standard
by the ASoC core, causing confusion in machine drivers such as the 1133-EV1
board.
Reported-by: Tommy Zhu <Tommy.Zhu@wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
REQ_HARDBARRIER is dead now, so remove the leftovers. What's left
at this point is:
- various checks inside the block layer.
- sanity checks in bio based drivers.
- now unused bio_empty_barrier helper.
- Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while,
but Xen really needs to sort out it's barrier situaton.
- setting of ordered tags in uas - dead code copied from old scsi
drivers.
- scsi different retry for barriers - it's dead and should have been
removed when flushes were converted to FS requests.
- blktrace handling of barriers - removed. Someone who knows blktrace
better should add support for REQ_FLUSH and REQ_FUA, though.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This moves some constants from sh_mmcif.c to sh_mmcif.h
so that they can be used in sh_mmcif_boot_init().
It also alters the definition of SOFT_RST_OFF from (0 << 31) to
~SOFT_RST_ON (= ~(1 << 31)). The former seems bogus. The latter is
consistent with the code in sh_mmcif_boot_init().
Cc: Yusuke Goda <yusuke.goda.sx@renesas.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
We currently use kmalloc-96 slab for struct irqaction allocations on
64bit arches.
This is unfortunate because of possible false sharing and two cache
lines accesses.
Move 'name' and 'dir' fields at the end of the structure, and force a
suitable alignement.
Hot path fields now use one cache line on x86_64.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1288865628.2659.69.camel@edumazet-laptop>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Someone added a new ldisc number and messed up the tabbing. Fix it before
anyone else copies it.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The alignment used for reading data into or out of pages used to be taken
from the data_off field in the message header. This only worked as long
as the page alignment matched the object offset, breaking direct io to
non-page aligned offsets.
Instead, explicitly specify the page alignment next to the page vector
in the ceph_msg struct, and use that instead of the message header (which
probably shouldn't be trusted). The alloc_msg callback is responsible for
filling in this field properly when it sets up the page vector.
Signed-off-by: Sage Weil <sage@newdream.net>
We used to infer alignment of IOs within a page based on the file offset,
which assumed they matched. This broke with direct IO that was not aligned
to pages (e.g., 512-byte aligned IO). We were also trusting the alignment
specified in the OSD reply, which could have been adjusted by the server.
Explicitly specify the page alignment when setting up OSD IO requests.
Signed-off-by: Sage Weil <sage@newdream.net>
Split the OMAP1 and OMAP2+ platform_device build and register code.
Convert the OMAP2+ variant to use omap_device.
This patch was developed in collaboration with Rajendra Nayak
<rnayak@ti.com>.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Multiple devices need S/R hooks (framebuffer, GPIO, camera).
Add infrastructure and convert existing framebuffer code to the new
model.
This patch should create no functional change.
Based on earlier work by Jonathan Corbet.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
SDHC2 is newly added in C0 stepping of Langwell. Without the Moorestown
specific quirk, the default pci_probe will be called and crash the kernel.
This patch unblocks the crash problem on C0 by using the same probing
function as HC1, which limits the number of slots to one.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
SFI provides a series of tables. These describe the platform devices present
including SPI and I²C devices, as well as various sensors, keypads and other
glue as well as interfaces provided via the SCU IPC mechanism (intel_scu_ipc.c)
This patch is a merge of the core elements and relevant fixes from the
Intel development code by Feng, Alek, myself into a single coherent patch
for upstream submission.
It provides the needed infrastructure to register I2C, SPI and platform devices
described by the tables, as well as handlers for some of the hardware already
supported in kernel. The 0.8 firmware also provides GPIO tables.
Devices are created at boot time or if they are SCU dependant at the point an
SCU is discovered. The existing Linux device mechanisms will then handle the
device binding. At an abstract level this is an SFI to Linux device translator.
Device/platform specific setup/glue is in this file. This is done so that the
drivers for the generic I²C and SPI bus devices remain cross platform as they
should.
(Updated from RFC version to correct the emc1403 name used by the firmware
and a wrongly used #define)
Signed-off-by: Alek Du <alek.du@linux.intel.com>
LKML-Reference: <20101109112158.20013.6158.stgit@localhost.localdomain>
[Clean ups, removal of 0.7 support]
Signed-off-by: Feng Tang <feng.tang@linux.intel.com>
[Clean ups]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The _INTC_ARRAY() initializer presently does a NULL test which blows up
as a non-constant initializer under gcc 4.5. This switches over to a type
test to account for NULL initializers explicitly.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Fix build error with GCC 3.x caused by commit b28efd54
"kernel: roundup should only reference arguments once" by constifying
temporary variable used in that macro.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
While tracking dev_base_lock users, I found decnet used it in
dnet_select_source(), but for a wrong purpose:
Writers only hold RTNL, not dev_base_lock, so readers must use RCU if
they cannot use RTNL.
Adds an rcu_head in struct dn_ifaddr and handle proper RCU management.
Adds __rcu annotation in dn_route as well.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix struct field name, prevent kernel-doc warnings.
Warning(include/linux/usb.h:865): No description found for parameter 'unlocked_ioctl'
Warning(include/linux/usb.h:865): Excess struct/union/enum/typedef member 'ioctl' description in 'usb_driver'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
After e6484930d7: net: allocate tx queues in register_netdevice
These calls make net drivers oops at load time, so let's avoid people
git-bisect'ing known problems.
Signed-off-by: Guillaume Chazarain <guichaz@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Sometimes it is possible and reasonable to adjust the parent clock rate to
improve precision of the child clock, e.g., if the child clock has no siblings.
clk_round_parent() is a new addition to the SH clock-framework API, that
implements such an optimization for child clocks with divisors, taking all
integer values in a range.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Having the trace calls defined in the always inlined kmalloc functions
in include/linux/slub_def.h causes a lot of code duplication as the
trace functions get instantiated for each kamalloc call site. This can
simply be removed by pushing the trace calls down into the functions in
slub.c.
On my x86_64 built this patch shrinks the code size of the kernel by
approx 36K and also shrinks the code size of many modules -- too many to
list here ;)
size vmlinux (2.6.36) reports
text data bss dec hex filename
5410611 743172 828928 6982711 6a8c37 vmlinux
5373738 744244 828928 6946910 6a005e vmlinux + patch
The resulting kernel has had some testing & kmalloc trace still seems to
work.
This patch
- moves trace_kmalloc out of the inlined kmalloc() and pushes it down
into kmem_cache_alloc_trace() so this it only get instantiated once.
- rename kmem_cache_alloc_notrace() to kmem_cache_alloc_trace() to
indicate that now is does have tracing. (maybe this would better being
called something like kmalloc_kmem_cache ?)
- adds a new function kmalloc_order() to handle allocation and tracing
of large allocations of page order.
- removes tracing from the inlined kmalloc_large() replacing them with a
call to kmalloc_order();
- move tracing out of inlined kmalloc_node() and pushing it down into
kmem_cache_alloc_node_trace
- rename kmem_cache_alloc_node_notrace() to
kmem_cache_alloc_node_trace()
- removes the include of trace/events/kmem.h from slub_def.h.
v2
- keep kmalloc_order_trace inline when !CONFIG_TRACE
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
In order to not touch the driver file for different xtal usage,
push the clkin value to board file and calculate the register
value instead of hardcoding it.
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Presently the extern inline case results in a compiler warning on ARM due
to the memory barrier definition used in the I/O routines. These
ultimately all want to be static inline anyways, so just convert them all
in place.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
KGDB, much like the resume process, needs to be able to mark all keys that
were pressed at the time we dropped into the debuggers as "released", since
it is unlikely that the keys stay pressed for the entire duration of the
debug session.
Also we need to make sure that input_reset_device() and input_dev_suspend()
only attempt to change state of currenlt opened devices since closed devices
may not be ready to accept IO requests.
Tested-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Unify adp5588-gpio and adp5588-keys common header defines (as per Andrew
Morton request). For consistency, move remaining defines and prefix
accordingly.
No functional changes.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
If a connection is closed just after a sequence or create_session
is sent over it, we could end up trying to register a callback that will
never get called since the xprt is already marked dead.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
The preempt count logic tries to take the BKL into account, which breaks
when CONFIG_BKL is not set.
Use the same preempt_count offset that we use without CONFIG_PREEMPT
when CONFIG_BKL is disabled.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reported-and-tested-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6:
spi/pl022: fix erroneous platform data in U300
spi: fixed odd static string conventions in core code
spi/bfin_spi: only request GPIO on first load
spi/bfin_spi: handle error/status changes after data interrupts
spi: enable spi_board_info to be registered after spi_master
There are two identical implementations of of_get_mac_address(), one
each in arch/powerpc/kernel/prom_parse.c and
arch/microblaze/kernel/prom_parse.c. Move this function to a new
common file of_net.{c,h} and adjust all the callers to include the new
header.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
[grant.likely@secretlab.ca: protect header with #ifdef]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllers
i2c-i801: Handle multiple instances instead of keeping global state
i2c-i801: Add Intel Patsburg device ID
i2c: Drop unused I2C_CLASS_TV flags
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Fix up irq_node() for irq_data changes.
genirq: Add single IRQ reservation helper
genirq: Warn if enable_irq is called before irq is set up
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
semaphore: Remove mutex emulation
staging: Final semaphore cleanup
jbd2: Convert jbd2_slab_create_sem to mutex
hpfs: Convert sbi->hpfs_creation_de to mutex
Fix up trivial change/delete conflicts with deleted 'dream' drivers
(drivers/staging/dream/camera/{mt9d112.c,mt9p012_fox.c,mt9t013.c,s5k3e2fx.c})
Add support for the Intel Patsburg PCH SMBus Controller.
Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Now when the SH-Mobile ARM platforms have been converted
to use device name it is possible to remove "clk" from
struct sh_timer_config.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This one was only used for a nasty hack in nfsd, which has recently
been removed.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
isdn: mISDN: socket: fix information leak to userland
netdev: can: Change mail address of Hans J. Koch
pcnet_cs: add new_id
net: Truncate recvfrom and sendto length to INT_MAX.
RDS: Let rds_message_alloc_sgs() return NULL
RDS: Copy rds_iovecs into kernel memory instead of rereading from userspace
RDS: Clean up error handling in rds_cmsg_rdma_args
RDS: Return -EINVAL if rds_rdma_pages returns an error
net: fix rds_iovec page count overflow
can: pch_can: fix section mismatch warning by using a whitelisted name
can: pch_can: fix sparse warning
netxen_nic: Fix the tx queue manipulation bug in netxen_nic_probe
ip_gre: fix fallback tunnel setup
vmxnet: trivial annotation of protocol constant
vmxnet3: remove unnecessary byteswapping in BAR writing macros
ipv6/udp: report SndbufErrors and RcvbufErrors
phy/marvell: rename 88ec048 to 88e1318s and fix mscr1 addr
We modified setlease to require the caller to allocate the new lease in
the case of creating a new lease, but forgot to fix up the filesystem
methods.
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Steve French <sfrench@samba.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.infradead.org/users/eparis/notify: (22 commits)
Ensure FMODE_NONOTIFY is not set by userspace
make fanotify_read() restartable across signals
fsnotify: remove alignment padding from fsnotify_mark on 64 bit builds
fs/notify/fanotify/fanotify_user.c: fix warnings
fanotify: Fix FAN_CLOSE comments
fanotify: do not recalculate the mask if the ignored mask changed
fanotify: ignore events on directories unless specifically requested
fsnotify: rename FS_IN_ISDIR to FS_ISDIR
fanotify: do not send events for irregular files
fanotify: limit number of listeners per user
fanotify: allow userspace to override max marks
fanotify: limit the number of marks in a single fanotify group
fanotify: allow userspace to override max queue depth
fsnotify: implement a default maximum queue depth
fanotify: ignore fanotify ignore marks if open writers
fanotify: allow userspace to flush all marks
fsnotify: call fsnotify_parent in perm events
fsnotify: correctly handle return codes from listeners
fanotify: use __aligned_u64 in fanotify userspace metadata
fanotify: implement fanotify listener ordering
...
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
jump label: Add work around to i386 gcc asm goto bug
x86, ftrace: Use safe noops, drop trap test
jump_label: Fix unaligned traps on sparc.
jump label: Make arch_jump_label_text_poke_early() optional
jump label: Fix error with preempt disable holding mutex
oprofile: Remove deprecated use of flush_scheduled_work()
oprofile: Fix the hang while taking the cpu offline
jump label: Fix deadlock b/w jump_label_mutex vs. text_mutex
jump label: Fix module __init section race
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Check irq_remapped instead of remapping_enabled in destroy_irq()
In fsnotify_open() ensure that FMODE_NONOTIFY is never set by userspace.
Also always call fsnotify_parent and fsnotify.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
