21 Oct, 2020
1 commit
-
Steps on the way to 5.10-rc1
Change-Id: Ie936eb552cef5285deba6d52c62251db6b7fbd8c
Signed-off-by: Greg Kroah-Hartman
11 Sep, 2020
1 commit
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The name of the directory where the schedule docs are
stored are wrong on those files.Signed-off-by: Mauro Carvalho Chehab
Reviewed-by: Valentin Schneider
Link: https://lore.kernel.org/r/a32c2bba17aa69dc18670b7de1a3a35bfa1e1f88.1599660067.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet
07 Aug, 2020
1 commit
-
…ub/scm/linux/kernel/git/tip/tip") into android-mainline
Baby steps for 5.9-rc1
Resolves some kernel/sched/ merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I88cf5411ac7251f9795d9c50cb18b0df5bf0bcd6
01 Aug, 2020
2 commits
-
Documentation/scheduler/sched-capacity.rst ought to be the canonical place
to blabber about SD_ASYM_CPUCAPACITY, so remove its explanation from
sched-energy.rst and point to sched-capacity.rst instead.Signed-off-by: Valentin Schneider
Signed-off-by: Ingo Molnar
Link: https://lore.kernel.org/r/20200731192016.7484-4-valentin.schneider@arm.com -
Add some documentation detailing the concepts, requirements and
implementation of capacity aware scheduling across the different scheduler
classes.Signed-off-by: Valentin Schneider
Signed-off-by: Ingo Molnar
Link: https://lore.kernel.org/r/20200731192016.7484-3-valentin.schneider@arm.com
12 Jun, 2020
1 commit
-
…rg/pub/scm/linux/kernel/git/viro/vfs") into android-mainline
baby steps on the way to 5.8-rc1
Change-Id: I45a38d5752e33d1f9a27bce6055435811512ea87
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
06 Jun, 2020
1 commit
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This effectively reverts 531b5c9f5cd0 ("sched/topology: Make Energy
Aware Scheduling depend on schedutil"), and updates the documentation
accordingly.In the context of GKI 2.0, some partners need to use a custom cpufreq
govenor, but would like to keep EAS enabled.Remove the hard dependency between them.
Bug: 157580690
Signed-off-by: Quentin Perret
Change-Id: Ied1c5aba6b692e26776b3e2c050780a67cc5bae1
22 Apr, 2020
1 commit
-
The documentation claims that two sched groups must not overlap. This is
no longer true, as overlapping sched groups are used on NUMA systems.
This change has been introduced by commit e3589f6c81e47 and was
documented by an in-code comment in commit 35a566e6e8a18.Signed-off-by: Adrian Freund
Link: https://lore.kernel.org/r/20200407130525.76663-1-adrian@freund.io
Signed-off-by: Jonathan Corbet
29 Oct, 2019
1 commit
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The rain.com domain recently moved to pdxhosts.com, making the scheduler
documentation point to broken links. Fix the links in the scheduler
documentation.CC: Rick Lindsley
Signed-off-by: Andre Azevedo
Signed-off-by: Jonathan Corbet
08 Aug, 2019
1 commit
-
It has been observed, that highly-threaded, non-cpu-bound applications
running under cpu.cfs_quota_us constraints can hit a high percentage of
periods throttled while simultaneously not consuming the allocated
amount of quota. This use case is typical of user-interactive non-cpu
bound applications, such as those running in kubernetes or mesos when
run on multiple cpu cores.This has been root caused to cpu-local run queue being allocated per cpu
bandwidth slices, and then not fully using that slice within the period.
At which point the slice and quota expires. This expiration of unused
slice results in applications not being able to utilize the quota for
which they are allocated.The non-expiration of per-cpu slices was recently fixed by
'commit 512ac999d275 ("sched/fair: Fix bandwidth timer clock drift
condition")'. Prior to that it appears that this had been broken since
at least 'commit 51f2176d74ac ("sched/fair: Fix unlocked reads of some
cfs_b->quota/period")' which was introduced in v3.16-rc1 in 2014. That
added the following conditional which resulted in slices never being
expired.if (cfs_rq->runtime_expires != cfs_b->runtime_expires) {
/* extend local deadline, drift is bounded above by 2 ticks */
cfs_rq->runtime_expires += TICK_NSEC;Because this was broken for nearly 5 years, and has recently been fixed
and is now being noticed by many users running kubernetes
(https://github.com/kubernetes/kubernetes/issues/67577) it is my opinion
that the mechanisms around expiring runtime should be removed
altogether.This allows quota already allocated to per-cpu run-queues to live longer
than the period boundary. This allows threads on runqueues that do not
use much CPU to continue to use their remaining slice over a longer
period of time than cpu.cfs_period_us. However, this helps prevent the
above condition of hitting throttling while also not fully utilizing
your cpu quota.This theoretically allows a machine to use slightly more than its
allotted quota in some periods. This overflow would be bounded by the
remaining quota left on each per-cpu runqueueu. This is typically no
more than min_cfs_rq_runtime=1ms per cpu. For CPU bound tasks this will
change nothing, as they should theoretically fully utilize all of their
quota in each period. For user-interactive tasks as described above this
provides a much better user/application experience as their cpu
utilization will more closely match the amount they requested when they
hit throttling. This means that cpu limits no longer strictly apply per
period for non-cpu bound applications, but that they are still accurate
over longer timeframes.This greatly improves performance of high-thread-count, non-cpu bound
applications with low cfs_quota_us allocation on high-core-count
machines. In the case of an artificial testcase (10ms/100ms of quota on
80 CPU machine), this commit resulted in almost 30x performance
improvement, while still maintaining correct cpu quota restrictions.
That testcase is available at https://github.com/indeedeng/fibtest.Fixes: 512ac999d275 ("sched/fair: Fix bandwidth timer clock drift condition")
Signed-off-by: Dave Chiluk
Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Phil Auld
Reviewed-by: Ben Segall
Cc: Ingo Molnar
Cc: John Hammond
Cc: Jonathan Corbet
Cc: Kyle Anderson
Cc: Gabriel Munos
Cc: Peter Oskolkov
Cc: Cong Wang
Cc: Brendan Gregg
Link: https://lkml.kernel.org/r/1563900266-19734-2-git-send-email-chiluk+linux@indeed.com
17 Jul, 2019
1 commit
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Pull rst conversion of docs from Mauro Carvalho Chehab:
"As agreed with Jon, I'm sending this big series directly to you, c/c
him, as this series required a special care, in order to avoid
conflicts with other trees"* tag 'docs/v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (77 commits)
docs: kbuild: fix build with pdf and fix some minor issues
docs: block: fix pdf output
docs: arm: fix a breakage with pdf output
docs: don't use nested tables
docs: gpio: add sysfs interface to the admin-guide
docs: locking: add it to the main index
docs: add some directories to the main documentation index
docs: add SPDX tags to new index files
docs: add a memory-devices subdir to driver-api
docs: phy: place documentation under driver-api
docs: serial: move it to the driver-api
docs: driver-api: add remaining converted dirs to it
docs: driver-api: add xilinx driver API documentation
docs: driver-api: add a series of orphaned documents
docs: admin-guide: add a series of orphaned documents
docs: cgroup-v1: add it to the admin-guide book
docs: aoe: add it to the driver-api book
docs: add some documentation dirs to the driver-api book
docs: driver-model: move it to the driver-api book
docs: lp855x-driver.rst: add it to the driver-api book
...
16 Jul, 2019
1 commit
-
Pull PCI updates from Bjorn Helgaas:
"Enumeration changes:- Evaluate PCI Boot Configuration _DSM to learn if firmware wants us
to preserve its resource assignments (Benjamin Herrenschmidt)- Simplify resource distribution (Nicholas Johnson)
- Decode 32 GT/s link speed (Gustavo Pimentel)
Virtualization:
- Fix incorrect caching of VF config space size (Alex Williamson)
- Fix VF driver probing sysfs knobs (Alex Williamson)
Peer-to-peer DMA:
- Fix dma_virt_ops check (Logan Gunthorpe)
Altera host bridge driver:
- Allow building as module (Ley Foon Tan)
Armada 8K host bridge driver:
- add PHYs support (Miquel Raynal)
DesignWare host bridge driver:
- Export APIs to support removable loadable module (Vidya Sagar)
- Enable Relaxed Ordering erratum workaround only on Tegra20 &
Tegra30 (Vidya Sagar)Hyper-V host bridge driver:
- Fix use-after-free in eject (Dexuan Cui)
Mobiveil host bridge driver:
- Clean up and fix many issues, including non-identify mapped
windows, 64-bit windows, multi-MSI, class code, INTx clearing (Hou
Zhiqiang)Qualcomm host bridge driver:
- Use clk bulk API for 2.4.0 controllers (Bjorn Andersson)
- Add QCS404 support (Bjorn Andersson)
- Assert PERST for at least 100ms (Niklas Cassel)
R-Car host bridge driver:
- Add r8a774a1 DT support (Biju Das)
Tegra host bridge driver:
- Add support for Gen2, opportunistic UpdateFC and ACK (PCIe protocol
details) AER, GPIO-based PERST# (Manikanta Maddireddy)- Fix many issues, including power-on failure cases, interrupt
masking in suspend, UPHY settings, AFI dynamic clock gating,
pending DLL transactions (Manikanta Maddireddy)Xilinx host bridge driver:
- Fix NWL Multi-MSI programming (Bharat Kumar Gogada)
Endpoint support:
- Fix 64bit BAR support (Alan Mikhak)
- Fix pcitest build issues (Alan Mikhak, Andy Shevchenko)
Bug fixes:
- Fix NVIDIA GPU multi-function power dependencies (Abhishek Sahu)
- Fix NVIDIA GPU HDA enablement issue (Lukas Wunner)
- Ignore lockdep for sysfs "remove" (Marek Vasut)
Misc:
- Convert docs to reST (Changbin Du, Mauro Carvalho Chehab)"
* tag 'pci-v5.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (107 commits)
PCI: Enable NVIDIA HDA controllers
tools: PCI: Fix installation when `make tools/pci_install`
PCI: dwc: pci-dra7xx: Fix compilation when !CONFIG_GPIOLIB
PCI: Fix typos and whitespace errors
PCI: mobiveil: Fix INTx interrupt clearing in mobiveil_pcie_isr()
PCI: mobiveil: Fix infinite-loop in the INTx handling function
PCI: mobiveil: Move PCIe PIO enablement out of inbound window routine
PCI: mobiveil: Add upper 32-bit PCI base address setup in inbound window
PCI: mobiveil: Add upper 32-bit CPU base address setup in outbound window
PCI: mobiveil: Mask out hardcoded bits in inbound/outbound windows setup
PCI: mobiveil: Clear the control fields before updating it
PCI: mobiveil: Add configured inbound windows counter
PCI: mobiveil: Fix the valid check for inbound and outbound windows
PCI: mobiveil: Clean-up program_{ib/ob}_windows()
PCI: mobiveil: Remove an unnecessary return value check
PCI: mobiveil: Fix error return values
PCI: mobiveil: Refactor the MEM/IO outbound window initialization
PCI: mobiveil: Make some register updates more readable
PCI: mobiveil: Reformat the code for readability
dt-bindings: PCI: mobiveil: Change gpio_slave and apb_csr to optional
...
15 Jul, 2019
2 commits
-
There are a number of driver-specific descriptions that contain a
mix of userspace and kernelspace documentation. Just like we did
with other similar subsystems, add them at the driver-api
groupset, but don't move the directories.Signed-off-by: Mauro Carvalho Chehab
-
Those files belong to the admin guide, so add them.
Signed-off-by: Mauro Carvalho Chehab
10 Jul, 2019
1 commit
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Pull Documentation updates from Jonathan Corbet:
"It's been a relatively busy cycle for docs:- A fair pile of RST conversions, many from Mauro. These create more
than the usual number of simple but annoying merge conflicts with
other trees, unfortunately. He has a lot more of these waiting on
the wings that, I think, will go to you directly later on.- A new document on how to use merges and rebases in kernel repos,
and one on Spectre vulnerabilities.- Various improvements to the build system, including automatic
markup of function() references because some people, for reasons I
will never understand, were of the opinion that
:c:func:``function()`` is unattractive and not fun to type.- We now recommend using sphinx 1.7, but still support back to 1.4.
- Lots of smaller improvements, warning fixes, typo fixes, etc"
* tag 'docs-5.3' of git://git.lwn.net/linux: (129 commits)
docs: automarkup.py: ignore exceptions when seeking for xrefs
docs: Move binderfs to admin-guide
Disable Sphinx SmartyPants in HTML output
doc: RCU callback locks need only _bh, not necessarily _irq
docs: format kernel-parameters -- as code
Doc : doc-guide : Fix a typo
platform: x86: get rid of a non-existent document
Add the RCU docs to the core-api manual
Documentation: RCU: Add TOC tree hooks
Documentation: RCU: Rename txt files to rst
Documentation: RCU: Convert RCU UP systems to reST
Documentation: RCU: Convert RCU linked list to reST
Documentation: RCU: Convert RCU basic concepts to reST
docs: filesystems: Remove uneeded .rst extension on toctables
scripts/sphinx-pre-install: fix out-of-tree build
docs: zh_CN: submitting-drivers.rst: Remove a duplicated Documentation/
Documentation: PGP: update for newer HW devices
Documentation: Add section about CPU vulnerabilities for Spectre
Documentation: platform: Delete x86-laptop-drivers.txt
docs: Note that :c:func: should no longer be used
...
09 Jul, 2019
1 commit
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Pull cgroup updates from Tejun Heo:
"Documentation updates and the addition of cgroup_parse_float() which
will be used by new controllers including blk-iocost"* 'for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
docs: cgroup-v1: convert docs to ReST and rename to *.rst
cgroup: Move cgroup_parse_float() implementation out of CONFIG_SYSFS
cgroup: add cgroup_parse_float()
17 Jun, 2019
1 commit
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runnable_avg_yN_inv[] is only used in kernel/sched/pelt.c but was
included in several other places because they need other macros all
came from kernel/sched/sched-pelt.h which was generated by
Documentation/scheduler/sched-pelt. As the result, it causes compilation
a lot of warnings,kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
...Silence it by appending the __maybe_unused attribute for it, so all
generated variables and macros can still be kept in the same file.Signed-off-by: Qian Cai
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Link: https://lkml.kernel.org/r/1559596304-31581-1-git-send-email-cai@lca.pw
Signed-off-by: Ingo Molnar
15 Jun, 2019
3 commits
-
Convert the PM documents to ReST, in order to allow them to
build with Sphinx.The conversion is actually:
- add blank lines and indentation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.Signed-off-by: Mauro Carvalho Chehab
Signed-off-by: Bjorn Helgaas
Acked-by: Mark Brown
Acked-by: Srivatsa S. Bhat (VMware) -
In order to prepare to add them to the Kernel API book,
convert the files to ReST format.The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.Signed-off-by: Mauro Carvalho Chehab
Signed-off-by: Jonathan Corbet -
Convert the cgroup-v1 files to ReST format, in order to
allow a later addition to the admin-guide.The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.Signed-off-by: Mauro Carvalho Chehab
Acked-by: Tejun Heo
Signed-off-by: Tejun Heo
27 Jan, 2019
1 commit
-
Add some documentation detailing the main design points of EAS, as well
as a list of its dependencies.Parts of this documentation are taken from Morten Rasmussen's original
EAS posting: https://lkml.org/lkml/2015/7/7/754Co-authored-by: Morten Rasmussen
Signed-off-by: Quentin Perret
Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Qais Yousef
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: corbet@lwn.net
Cc: dietmar.eggemann@arm.com
Cc: patrick.bellasi@arm.com
Cc: rjw@rjwysocki.net
Link: https://lkml.kernel.org/r/20190110110546.8101-3-quentin.perret@arm.com
Signed-off-by: Ingo Molnar
25 Oct, 2018
1 commit
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Pull documentation updates from Jonathan Corbet:
"This is a fairly typical cycle for documentation. There's some welcome
readability improvements for the formatted output, some LICENSES
updates including the addition of the ISC license, the removal of the
unloved and unmaintained 00-INDEX files, the deprecated APIs document
from Kees, more MM docs from Mike Rapoport, and the usual pile of typo
fixes and corrections"* tag 'docs-4.20' of git://git.lwn.net/linux: (41 commits)
docs: Fix typos in histogram.rst
docs: Introduce deprecated APIs list
kernel-doc: fix declaration type determination
doc: fix a typo in adding-syscalls.rst
docs/admin-guide: memory-hotplug: remove table of contents
doc: printk-formats: Remove bogus kobject references for device nodes
Documentation: preempt-locking: Use better example
dm flakey: Document "error_writes" feature
docs/completion.txt: Fix a couple of punctuation nits
LICENSES: Add ISC license text
LICENSES: Add note to CDDL-1.0 license that it should not be used
docs/core-api: memory-hotplug: add some details about locking internals
docs/core-api: rename memory-hotplug-notifier to memory-hotplug
docs: improve readability for people with poorer eyesight
yama: clarify ptrace_scope=2 in Yama documentation
docs/vm: split memory hotplug notifier description to Documentation/core-api
docs: move memory hotplug description into admin-guide/mm
doc: Fix acronym "FEKEK" in ecryptfs
docs: fix some broken documentation references
iommu: Fix passthrough option documentation
...
17 Oct, 2018
1 commit
-
To prevent dynamic completion objects from being de-allocated while still
in use, add a recommendation to embed them in long lived data structures.Also add a note for the on-stack case that emphasizes the dangers of
the limited scope, and recommends dynamic allocation if scope limitations
are not clearly understood.[ mingo: Minor touch-ups of the text, expanded it a bit to make the
warnings Nicholas added more prominent. ]Signed-off-by: Nicholas Mc Guire
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: john.garry@huawei.com
Link: http://lkml.kernel.org/r/1539697539-24055-1-git-send-email-hofrat@osadl.org
Signed-off-by: Ingo Molnar
13 Oct, 2018
1 commit
-
This patch fixes a couple of punctuation nits which can make the document
more correct and readable.Also missing "()" are added to some function references for consistency.
Signed-off-by: John Garry
Acked-by: Randy Dunlap
Signed-off-by: Jonathan Corbet
11 Oct, 2018
2 commits
-
Refresh the document:
- Remove unnecessary liguistic complexity and improve the clarity of the text
- Improve the explanations all around
- Remove unnecessary and stale version info
- Fix whitespace noise
- Make pseudo-code match kernel style
- Fix minor syntax errors in pseudo-code
- Use consistent denotation
- Mark multi-CPU sequences more explicitly
- Unbreak line breaks
- Use quotes to refer to 'struct completion'
- Use 'IRQ context' and 'IRQs' consistently
- Improve grammar
- etc.
Cc: John Garry
Cc: Linus Torvalds
Cc: Nicholas Mc Guire
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: corbet@lwn.net
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1539183392-239389-1-git-send-email-john.garry@huawei.com
Signed-off-by: Ingo Molnar -
This patch fixes a couple of punctuation nits which can make the document
more correct and readable.Also missing "()" are added to some function references for consistency.
Signed-off-by: John Garry
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: corbet@lwn.net
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1539183392-239389-1-git-send-email-john.garry@huawei.com
Signed-off-by: Ingo Molnar
10 Sep, 2018
1 commit
-
This is a respin with a wider audience (all that get_maintainer returned)
and I know this spams a *lot* of people. Not sure what would be the correct
way, so my apologies for ruining your inbox.The 00-INDEX files are supposed to give a summary of all files present
in a directory, but these files are horribly out of date and their
usefulness is brought into question. Often a simple "ls" would reveal
the same information as the filenames are generally quite descriptive as
a short introduction to what the file covers (it should not surprise
anyone what Documentation/sched/sched-design-CFS.txt covers)A few years back it was mentioned that these files were no longer really
needed, and they have since then grown further out of date, so perhaps
it is time to just throw them out.A short status yields the following _outdated_ 00-INDEX files, first
counter is files listed in 00-INDEX but missing in the directory, last
is files present but not listed in 00-INDEX.List of outdated 00-INDEX:
Documentation: (4/10)
Documentation/sysctl: (0/1)
Documentation/timers: (1/0)
Documentation/blockdev: (3/1)
Documentation/w1/slaves: (0/1)
Documentation/locking: (0/1)
Documentation/devicetree: (0/5)
Documentation/power: (1/1)
Documentation/powerpc: (0/5)
Documentation/arm: (1/0)
Documentation/x86: (0/9)
Documentation/x86/x86_64: (1/1)
Documentation/scsi: (4/4)
Documentation/filesystems: (2/9)
Documentation/filesystems/nfs: (0/2)
Documentation/cgroup-v1: (0/2)
Documentation/kbuild: (0/4)
Documentation/spi: (1/0)
Documentation/virtual/kvm: (1/0)
Documentation/scheduler: (0/2)
Documentation/fb: (0/1)
Documentation/block: (0/1)
Documentation/networking: (6/37)
Documentation/vm: (1/3)Then there are 364 subdirectories in Documentation/ with several files that
are missing 00-INDEX alltogether (and another 120 with a single file and no
00-INDEX).I don't really have an opinion to whether or not we /should/ have 00-INDEX,
but the above 00-INDEX should either be removed or be kept up to date. If
we should keep the files, I can try to keep them updated, but I rather not
if we just want to delete them anyway.As a starting point, remove all index-files and references to 00-INDEX and
see where the discussion is going.Signed-off-by: Henrik Austad
Acked-by: "Paul E. McKenney"
Just-do-it-by: Steven Rostedt
Reviewed-by: Jens Axboe
Acked-by: Paul Moore
Acked-by: Greg Kroah-Hartman
Acked-by: Mark Brown
Acked-by: Mike Rapoport
Cc: [Almost everybody else]
Signed-off-by: Jonathan Corbet
14 May, 2018
1 commit
-
Signed-off-by: Claudio Scordino
Signed-off-by: Peter Zijlstra (Intel)
Cc: Jonathan Corbet
Cc: Juri Lelli
Cc: Linus Torvalds
Cc: Luca Abeni
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1522741362-4542-1-git-send-email-claudio@evidence.eu.com
Signed-off-by: Ingo Molnar
16 Nov, 2017
1 commit
-
Signed-off-by: Claudio Scordino
Signed-off-by: Luca Abeni
Acked-by: Daniel Bristot de Oliveira
Acked-by: Peter Zijlstra
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Mathieu Poirier
Cc: Thomas Gleixner
Cc: Tommaso Cucinotta
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1510658366-28995-1-git-send-email-claudio@evidence.eu.com
Signed-off-by: Ingo Molnar
08 Jun, 2017
1 commit
-
This patch adds the documentation about the GRUB reclaiming algorithm,
adding a few details discussed in list.Signed-off-by: Claudio Scordino
Signed-off-by: Luca Abeni
Signed-off-by: Peter Zijlstra (Intel)
Cc: Daniel Bristot de Oliveira
Cc: Joel Fernandes
Cc: Juri Lelli
Cc: Linus Torvalds
Cc: Mathieu Poirier
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Steven Rostedt
Cc: Thomas Gleixner
Cc: Tommaso Cucinotta
Link: http://lkml.kernel.org/r/1495138417-6203-11-git-send-email-luca.abeni@santannapisa.it
Signed-off-by: Ingo Molnar
14 Apr, 2017
1 commit
-
Add a user-space program to compute/generate the PELT constants.
The kernel/sched/sched-pelt.h header will contain the output of
this program.Signed-off-by: Yuyang Du
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: bsegall@google.com
Cc: dietmar.eggemann@arm.com
Cc: matt@codeblueprint.co.uk
Cc: morten.rasmussen@arm.com
Cc: pjt@google.com
Cc: umgwanakikbuti@gmail.com
Cc: vincent.guittot@linaro.org
Link: http://lkml.kernel.org/r/1486935863-25251-2-git-send-email-yuyang.du@intel.com
Signed-off-by: Ingo Molnar
22 Jan, 2017
1 commit
-
I feel that the example given in the document to show the possibility
of task starvation of configurable period is wrong.The example says group A and B both have 50% bandwidth, and a while (1)
loop in A will run for the full period of B and can starve B's tasks.So I think the runtime of group A should be 50000us, then the period and
runtime of group B should be 50000us and 25000us.Signed-off-by: Zhou Chengming
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: corbet@lwn.net
Cc: iamyooon@gmail.com
Cc: linux-doc@vger.kernel.org
Cc: lizefan@huawei.com
Link: http://lkml.kernel.org/r/1485069755-44287-1-git-send-email-zhouchengming1@huawei.com
Signed-off-by: Ingo Molnar
14 Jan, 2017
1 commit
-
This patch allows for reading the current (leftover) runtime and
absolute deadline of a SCHED_DEADLINE task through /proc/*/sched
(entries dl.runtime and dl.deadline), while debugging/testing.Signed-off-by: Tommaso Cucinotta
Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Juri Lelli
Reviewed-by: Luca Abeni
Acked-by: Daniel Bistrot de Oliveira
Cc: Juri Lelli
Cc: Linus Torvalds
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Link: http://lkml.kernel.org/r/1477473437-10346-2-git-send-email-tommaso.cucinotta@sssup.it
Signed-off-by: Ingo Molnar
17 Nov, 2016
1 commit
-
Per the original author, the proposed document was never deemed
necessary, and the important bits got merged into completion.txt. Let's
just stop confusing readers by pointing at a nonexistent doc.Signed-off-by: Brian Norris
Signed-off-by: Jonathan Corbet
10 Sep, 2016
1 commit
-
This is a documentation only patch, explaining the
behavior of sched_yield() when a SCHED_DEADLINE
task calls it (give up remaining runtime and be
throttled until next period begins).Signed-off-by: Tommaso Cucinotta
Signed-off-by: Peter Zijlstra (Intel)
Reviewed-by: Juri Lelli
Reviewed-by: Luca Abeni
Reviewed-by: Daniel Bristot de Oliveira
Cc: Juri Lelli
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-dl@retis.sssup.it
Link: http://lkml.kernel.org/r/1473443117-11794-2-git-send-email-tommaso.cucinotta@sssup.it
Signed-off-by: Ingo Molnar
04 Aug, 2016
1 commit
-
cgroup's document path is changed to "cgroup-v1". update it.
Signed-off-by: seokhoon.yoon
Signed-off-by: Jonathan Corbet
19 May, 2015
4 commits
-
Introduce 4 subsections to make Section 3 more readable.
Signed-off-by: Luca Abeni
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: henrik@austad.us
Cc: juri.lelli@gmail.com
Cc: raistlin@linux.it
Link: http://lkml.kernel.org/r/1431954032-16473-10-git-send-email-luca.abeni@unitn.it
Signed-off-by: Ingo Molnar -
…solute scheduling deadlines
Clarify what is the relationship between tasks' parameters and scheduling
parameters, explaining how to set the scheduling parameters so that all the
absolute deadlines of a task are respected.Signed-off-by: Luca Abeni <luca.abeni@unitn.it>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: henrik@austad.us
Cc: juri.lelli@gmail.com
Cc: raistlin@linux.it
Link: http://lkml.kernel.org/r/1431954032-16473-9-git-send-email-luca.abeni@unitn.it
Signed-off-by: Ingo Molnar <mingo@kernel.org> -
Add a description of the Dhall's effect, some discussion about
schedulability tests for global EDF, and references to real-time
literature.Signed-off-by: Luca Abeni
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: henrik@austad.us
Cc: juri.lelli@gmail.com
Cc: raistlin@linux.it
Link: http://lkml.kernel.org/r/1431954032-16473-8-git-send-email-luca.abeni@unitn.it
Signed-off-by: Ingo Molnar -
Add a short discussion about sufficient and necessary schedulability tests,
and add a simple example showing that if D_i != P_i then density based tests
are only sufficient.Also add some references to scientific papers on schedulability tests for
EDF that are both necessary and sufficient, and on their computational
complexity.Signed-off-by: Luca Abeni
Signed-off-by: Peter Zijlstra (Intel)
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: henrik@austad.us
Cc: juri.lelli@gmail.com
Cc: raistlin@linux.it
Link: http://lkml.kernel.org/r/1431954032-16473-7-git-send-email-luca.abeni@unitn.it
Signed-off-by: Ingo Molnar
