24 Jul, 2020
1 commit
-
The LB_BIAS feature was removed in commit 1c1b8a7b03ef ("sched/fair:
Replace source_load() & target_load() with weighted_cpuload()"), so drop
the mention that it is disabled in the no_hz case.Signed-off-by: Julia Lawall
Link: https://lore.kernel.org/r/1595088518-28116-1-git-send-email-Julia.Lawall@inria.fr
Signed-off-by: Jonathan Corbet
07 May, 2020
1 commit
-
Sleeping for a certain amount of time requires use of different
functions, depending on the time period.
Documentation/timers/timers-howto.rst explains when to use which
function, and also checkpatch checks for some potentially
problematic cases.So let's create a helper that automatically chooses the appropriate
sleep function -> fsleep(), for flexible sleepingIf the delay is a constant, then the compiler should be able to ensure
that the new helper doesn't create overhead. If the delay is not
constant, then the new helper can save some code.Signed-off-by: Heiner Kallweit
Signed-off-by: David S. Miller
15 Jul, 2019
1 commit
-
The contents of those directories were orphaned at the documentation
body.While those directories could likely be moved to be inside some guide,
I'm opting to just adding their indexes to the main one, removing the
:orphan: and adding the SPDX header.For the drivers, the rationale is that the documentation contains
a mix of Kernelspace, uAPI and admin-guide. So, better to keep them on
separate directories, as we've be doing with similar subsystem-specific
docs that were not split yet.For the others, well... I'm too lazy to do the move. Also, it
seems to make sense to keep at least some of those at the main
dir (like kbuild, for example). In any case, a latter patch
could do the move.Signed-off-by: Mauro Carvalho Chehab
Acked-by: Bartlomiej Zolnierkiewicz
15 Jun, 2019
1 commit
-
The conversion here is really trivial: just a bunch of title
markups and very few puntual changes is enough to make it to
be parsed by Sphinx and generate a nice html.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: Mark Brown
Signed-off-by: Jonathan Corbet
22 Feb, 2019
1 commit
-
The documentation for dynamic ticks in high resolution timers uses an
incorrect path for /proc/stat - fix it.Signed-off-by: George Sofianos
Signed-off-by: Jonathan Corbet
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
23 Jul, 2018
1 commit
-
A n-bit binary counter can count a maximum of 2^n events and the count
value ranges from 0 to (2^n)-1Signed-off-by: Siddaraju DH
Signed-off-by: Jonathan Corbet
16 Feb, 2018
1 commit
-
Commit 6f1982fedd59 ("sched/isolation: Handle the nohz_full= parameter")
broke CONFIG_NO_HZ_FULL_ALL=y kernels. This breakage is due to the code
under CONFIG_NO_HZ_FULL_ALL failing to invoke the shiny new housekeeping
functions. This means that rcutorture scenario TREE04 now emits RCU CPU
stall warnings due to the RCU grace-period kthreads not being awakened
at a time of their choosing, or perhaps even not at all:[ 27.731422] rcu_bh kthread starved for 21001 jiffies! g18446744073709551369 c18446744073709551368 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=3
[ 27.731423] rcu_bh I14936 9 2 0x80080000
[ 27.731435] Call Trace:
[ 27.731440] __schedule+0x31a/0x6d0
[ 27.731442] schedule+0x31/0x80
[ 27.731446] schedule_timeout+0x15a/0x320
[ 27.731453] ? call_timer_fn+0x130/0x130
[ 27.731457] rcu_gp_kthread+0x66c/0xea0
[ 27.731458] ? rcu_gp_kthread+0x66c/0xea0Because no one has complained about CONFIG_NO_HZ_FULL_ALL=y being broken,
I hypothesize that no one is in fact using it, other than rcutorture.
This commit therefore eliminates CONFIG_NO_HZ_FULL_ALL and updates
rcutorture's config files to instead use the nohz_full= kernel parameter
to put the desired CPUs into nohz_full mode.Fixes: 6f1982fedd59 ("sched/isolation: Handle the nohz_full= parameter")
Reported-by: kernel test robot
Signed-off-by: Paul E. McKenney
Cc: Frederic Weisbecker
Cc: Thomas Gleixner
Cc: Chris Metcalf
Cc: Christoph Lameter
Cc: Linus Torvalds
Cc: Luiz Capitulino
Cc: Mike Galbraith
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Wanpeng Li
Cc: Ingo Molnar
Cc: John Stultz
Cc: Jonathan Corbet
27 Sep, 2017
1 commit
-
Some urls is invalid. I find alternative urls.
Signed-off-by: stephen lu
Signed-off-by: Jonathan Corbet
09 Jun, 2017
1 commit
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The CONFIG_RCU_NOCB_CPU_ALL, CONFIG_RCU_NOCB_CPU_NONE, and
CONFIG_RCU_NOCB_CPU_ZERO Kconfig options are used only in testing and
are redundant with the rcu_nocbs= boot parameter. This commit therefore
removes these three Kconfig options and adjusts the rcutorture scripts
to use the boot parameter instead.Signed-off-by: Paul E. McKenney
10 Feb, 2017
1 commit
-
Currently CONFIG_TIMER_STATS exposes process information across namespaces:
kernel/time/timer_list.c print_timer():
SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
/proc/timer_list:
#11: , hrtimer_wakeup, S:01, do_nanosleep, cron/2570
Given that the tracer can give the same information, this patch entirely
removes CONFIG_TIMER_STATS.Suggested-by: Thomas Gleixner
Signed-off-by: Kees Cook
Acked-by: John Stultz
Cc: Nicolas Pitre
Cc: linux-doc@vger.kernel.org
Cc: Lai Jiangshan
Cc: Shuah Khan
Cc: Xing Gao
Cc: Jonathan Corbet
Cc: Jessica Frazelle
Cc: kernel-hardening@lists.openwall.com
Cc: Nicolas Iooss
Cc: "Paul E. McKenney"
Cc: Petr Mladek
Cc: Richard Cochran
Cc: Tejun Heo
Cc: Michal Marek
Cc: Josh Poimboeuf
Cc: Dmitry Vyukov
Cc: Oleg Nesterov
Cc: "Eric W. Biederman"
Cc: Olof Johansson
Cc: Andrew Morton
Cc: linux-api@vger.kernel.org
Cc: Arjan van de Ven
Link: http://lkml.kernel.org/r/20170208192659.GA32582@beast
Signed-off-by: Thomas Gleixner
10 Oct, 2016
1 commit
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Update 00-INDEX files with the current file list to reflect the runnable
code move.Acked-by: Michal Marek
Acked-by: Jonathan Corbet
Reviewed-by: Kees Cook
Signed-off-by: Shuah Khan
24 Sep, 2016
1 commit
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Move timers examples to samples and remove it from Documentation
Makefile. Create a new Makefile to build timers. It can be built
from top level directory or from timers directory:Run make -C samples/timers or cd samples/timers; make
Acked-by: Jonathan Corbet
Acked-by: Clemens Ladisch
Signed-off-by: Shuah Khan
28 Apr, 2016
2 commits
-
This fixes several spelling mistakes in the Documentation/ tree, which
are caught by checkpatch.pl's spell checking.Signed-off-by: Kees Cook
Reviewed-by: Paul E. McKenney
Acked-by: Randy Dunlap
Signed-off-by: Jonathan Corbet -
It has:
a tense correction(led->leads);
a typo(unevitably->inevitably);Signed-off-by: Cao jin
Signed-off-by: Jonathan Corbet
18 Mar, 2016
1 commit
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Pul documentation update from Jon Corbet:
"Another relatively boring cycle for the docs tree: typo fixes,
translation updates, etc"* tag 'docs-for-linus' of git://git.lwn.net/linux:
modsign: Fix documentation on module signing enforcement parameter.
Doc: nfs: Fix typos in Documentation/filesystems/nfs
Documentation: kselftest: Remove duplicate word
doc: fix grammar
Documentation: Howto: Fixed subtitles style
Doc: ARM: Fix a typo in clksrc-change-registers.awk
Documentation/ko_KR: update maintainer information
Documentation: Fix int/unsigned int comparison
Documentation: Chinese translation of arm64/silicon-errata.txt
Documentation:Update Documentation/zh_CN/arm64/booting.txt
Documentation: HOWTO: remove obsolete info about regression postings
Doc: ja_JP: Fix a typo in HOWTO
Doc: i2c: Fix typo in Documentation/i2c
Doc: DocBook: Fix a typo in device-drivers.tmpl
Remove "arch" usage in Documentation/features/list-arch.sh
README: cosmetic fixes
Documentation/CodingStyle: add space before parenthesis in example macro
SubmittingPatches: fix spelling of "git send-email"
18 Feb, 2016
1 commit
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Signed int - unsigned int comparison fixed in mpssd, prctl, ptp, and
timers in Documentation. In places where 'int argc' and 'const char
**argv' are not used, they are replaced with voidDocumentation/mic/mpssd/mpssd.c: Fixed comparison in sum_iovec_len and
disp_iovecDocumentation/prctl/disable-tsc-ctxt-sw-stress-test.c: main signature
changed to void, as parameters 'argc' and 'argv' are never usedDocumentation/prctl/disable-tsc-on-off-stress-test.c: main signature
changed to voidDocumentation/prctl/disable-tsc-test.c: main signature changed to void
Documentation/ptp/testptp.c: Sign comparison fix
Documentation/timers/hpet_example.c: Sign comparision fixSigned-off-by: Mahesh Khanwalkar
Signed-off-by: Jonathan Corbet
17 Feb, 2016
1 commit
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Looks like the HPET spec at intel.com got moved.
It isn't hard to find so drop the link, just mention
the revision assumed.Suggested-by: Thomas Gleixner
Signed-off-by: Michael S. Tsirkin
Acked-by: Greg Kroah-Hartman
Cc: Arnd Bergmann
Cc: Clemens Ladisch
Cc: Jonathan Corbet
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1455145462-3877-1-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar
27 Feb, 2015
1 commit
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POSIX timers are no longer starved on adaptive-ticks CPUs. Instead, they
prevent affected CPUs from entering adaptive-ticks mode. This commit
therefore updates the NO_HZ.txt documentation.Signed-off-by: Paul E. McKenney
26 Sep, 2014
2 commits
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Add some missing files to .gitignore.
Push Documentation/.gitignore down into subdirectories.Signed-off-by: Peter Foley
Signed-off-by: Randy Dunlap
Signed-off-by: Jiri Kosina -
Change the Documentation makefiles from obj-m to subdir-y
to avoid generating unnecessary built-in.o files since nothing
in Documentation/ is ever linked in to vmlinux.Signed-off-by: Peter Foley
Acked-by: Sam Ravnborg
Signed-off-by: Randy Dunlap
Signed-off-by: Jiri Kosina
24 Jul, 2014
1 commit
-
This adds some documentation about clock sources, clock events,
the weak sched_clock() function and delay timers that answers
questions that repeatedly arise on the mailing lists.Cc: Thomas Gleixner
Cc: Nicolas Pitre
Cc: Colin Cross
Cc: John Stultz
Cc: Peter Zijlstra
Cc: Ingo Molnar
Signed-off-by: Linus Walleij
Acked-by: Nicolas Pitre
Signed-off-by: John Stultz
05 May, 2014
1 commit
-
Documentation/timers/timer_stats.txt claims:
"The readout of /proc/timer_stats automatically disables sampling. The sampled
information is kept until a new sample period is started. This allows multiple
readouts."Some simple testing shows that reading from /proc/timer_stats
does not disable sampling. Looking back over past source code,
it appears that it never did.Signed-off-by: Michael Kerrisk
Cc: Randy Dunlap
Link: http://lkml.kernel.org/r/53636FB6.9060407@gmail.com
[ Small tidyup of the changelog. ]
Signed-off-by: Ingo Molnar
11 Feb, 2014
1 commit
-
Some of the 00-INDEX files are somewhat outdated and some folders does
not contain 00-INDEX at all. Only outdated (with the notably exception
of spi) indexes are touched here, the 169 folders without 00-INDEX has
not been touched.New 00-INDEX
- spi/* was added in a series of commits dating back to 2006Added files (missing in (*/)00-INDEX)
- dmatest.txt was added by commit 851b7e16a07d ("dmatest: run test via
debugfs")
- this_cpu_ops.txt was added by commit a1b2a555d637 ("percpu: add
documentation on this_cpu operations")
- ww-mutex-design.txt was added by commit 040a0a371005 ("mutex: Add
support for wound/wait style locks")
- bcache.txt was added by commit cafe56359144 ("bcache: A block layer
cache")
- kernel-per-CPU-kthreads.txt was added by commit 49717cb40410
("kthread: Document ways of reducing OS jitter due to per-CPU
kthreads")
- phy.txt was added by commit ff764963479a ("drivers: phy: add generic
PHY framework")
- block/null_blk was added by commit 12f8f4fc0314 ("null_blk:
documentation")
- module-signing.txt was added by commit 3cafea307642 ("Add
Documentation/module-signing.txt file")
- assoc_array.txt was added by commit 3cb989501c26 ("Add a generic
associative array implementation.")
- arm/IXP4xx was part of the initial repo
- arm/cluster-pm-race-avoidance.txt was added by commit 7fe31d28e839
("ARM: mcpm: introduce helpers for platform coherency exit/setup")
- arm/firmware.txt was added by commit 7366b92a77fc ("ARM: Add
interface for registering and calling firmware-specific operations")
- arm/kernel_mode_neon.txt was added by commit 2afd0a05241d ("ARM:
7825/1: document the use of NEON in kernel mode")
- arm/tcm.txt was added by commit bc581770cfdd ("ARM: 5580/2: ARM TCM
(Tightly-Coupled Memory) support v3")
- arm/vlocks.txt was added by commit 9762f12d3e05 ("ARM: mcpm: Add
baremetal voting mutexes")
- blackfin/gptimers-example.c, Makefile was added by commit
4b60779d5ea7 ("Blackfin: add an example showing how to use the
gptimers API")
- devicetree/usage-model.txt was added by commit 31134efc681a ("dt:
Linux DT usage model documentation")
- fb/api.txt was added by commit fb21c2f42879 ("fbdev: Add FOURCC-based
format configuration API")
- fb/sm501.txt was added by commit e6a049807105 ("video, sm501: add
edid and commandline support")
- fb/udlfb.txt was added by commit 96f8d864afd6 ("fbdev: move udlfb out
of staging.")
- filesystems/Makefile was added by commit 1e0051ae48a2
("Documentation/fs/: split txt and source files")
- filesystems/nfs/nfsd-admin-interfaces.txt was added by commit
8a4c6e19cfed ("nfsd: document kernel interfaces for nfsd
configuration")
- ide/warm-plug-howto.txt was added by commit f74c91413ec6 ("ide: add
warm-plug support for IDE devices (take 2)")
- laptops/Makefile was added by commit d49129accc21
("Documentation/laptop/: split txt and source files")
- leds/leds-blinkm.txt was added by commit b54cf35a7f65 ("LEDS: add
BlinkM RGB LED driver, documentation and update MAINTAINERS")
- leds/ledtrig-oneshot.txt was added by commit 5e417281cde2 ("leds: add
oneshot trigger")
- leds/ledtrig-transient.txt was added by commit 44e1e9f8e705 ("leds:
add new transient trigger for one shot timer activation")
- m68k/README.buddha was part of the initial repo
- networking/LICENSE.(qla3xxx|qlcnic|qlge) was added by commits
40839129f779, c4e84bde1d59, 5a4faa873782
- networking/Makefile was added by commit 3794f3e812ef ("docsrc: build
Documentation/ sources")
- networking/i40evf.txt was added by commit 105bf2fe6b32 ("i40evf: add
driver to kernel build system")
- networking/ipsec.txt was added by commit b3c6efbc36e2 ("xfrm: Add
file to document IPsec corner case")
- networking/mac80211-auth-assoc-deauth.txt was added by commit
3cd7920a2be8 ("mac80211: add auth/assoc/deauth flow diagram")
- networking/netlink_mmap.txt was added by commit 5683264c3981
("netlink: add documentation for memory mapped I/O")
- networking/nf_conntrack-sysctl.txt was added by commit c9f9e0e1597f
("netfilter: doc: add nf_conntrack sysctl api documentation") lan)
- networking/team.txt was added by commit 3d249d4ca7d0 ("net: introduce
ethernet teaming device")
- networking/vxlan.txt was added by commit d342894c5d2f ("vxlan:
virtual extensible lan")
- power/runtime_pm.txt was added by commit 5e928f77a09a ("PM: Introduce
core framework for run-time PM of I/O devices (rev. 17)")
- power/charger-manager.txt was added by commit 3bb3dbbd56ea
("power_supply: Add initial Charger-Manager driver")
- RCU/lockdep-splat.txt was added by commit d7bd2d68aa2e ("rcu:
Document interpretation of RCU-lockdep splats")
- s390/kvm.txt was added by 5ecee4b (KVM: s390: API documentation)
- s390/qeth.txt was added by commit b4d72c08b358 ("qeth: bridgeport
support - basic control")
- scheduler/sched-bwc.txt was added by commit 88ebc08ea9f7 ("sched: Add
documentation for bandwidth control")
- scsi/advansys.txt was added by commit 4bd6d7f35661 ("[SCSI] advansys:
Move documentation to Documentation/scsi")
- scsi/bfa.txt was added by commit 1ec90174bdb4 ("[SCSI] bfa: add
readme file")
- scsi/bnx2fc.txt was added by commit 12b8fc10eaf4 ("[SCSI] bnx2fc: Add
driver documentation")
- scsi/cxgb3i.txt was added by commit c3673464ebc0 ("[SCSI] cxgb3i: Add
cxgb3i iSCSI driver.")
- scsi/hpsa.txt was added by commit 992ebcf14f3c ("[SCSI] hpsa: Add
hpsa.txt to Documentation/scsi")
- scsi/link_power_management_policy.txt was added by commit
ca77329fb713 ("[libata] Link power management infrastructure")
- scsi/osd.txt was added by commit 78e0c621deca ("[SCSI] osd:
Documentation for OSD library")
- scsi/scsi-parameter.txt was created/moved by commit 163475fb111c
("Documentation: move SCSI parameters to their own text file")
- serial/driver was part of the initial repo
- serial/n_gsm.txt was added by commit 323e84122ec6 ("n_gsm: add a
documentation")
- timers/Makefile was added by commit 3794f3e812ef ("docsrc: build
Documentation/ sources")
- virt/kvm/s390.txt was added by commit d9101fca3d57 ("KVM: s390:
diagnose call documentation")
- vm/split_page_table_lock was added by commit 49076ec2ccaf ("mm:
dynamically allocate page->ptl if it cannot be embedded to struct
page")
- w1/slaves/w1_ds28e04 was added by commit fbf7f7b4e2ae ("w1: Add
1-wire slave device driver for DS28E04-100")
- w1/masters/omap-hdq was added by commit e0a29382c6f5 ("hdq:
documentation for OMAP HDQ")
- x86/early-microcode.txt was added by commit 0d91ea86a895 ("x86, doc:
Documentation for early microcode loading")
- x86/earlyprintk.txt was added by commit a1aade478862 ("x86/doc:
mini-howto for using earlyprintk=dbgp")
- x86/entry_64.txt was added by commit 8b4777a4b50c ("x86-64: Document
some of entry_64.S")
- x86/pat.txt was added by commit d27554d874c7 ("x86: PAT
documentation")Moved files
- arm/kernel_user_helpers.txt was moved out of arch/arm/kernel by
commit 37b8304642c7 ("ARM: kuser: move interface documentation out of
the source code")
- efi-stub.txt was moved out of x86/ and down into Documentation/ in
commit 4172fe2f8a47 ("EFI stub documentation updates")
- laptops/hpfall.c was moved out of hwmon/ and into laptops/ in commit
efcfed9bad88 ("Move hp_accel to drivers/platform/x86")
- commit 5616c23ad9cd ("x86: doc: move x86-generic documentation from
Doc/x86/i386"):
* x86/usb-legacy-support.txt
* x86/boot.txt
* x86/zero_page.txt
- power/video_extension.txt was moved to acpi in commit 70e66e4df191
("ACPI / video: move video_extension.txt to Documentation/acpi")Removed files (left in 00-INDEX)
- memory.txt was removed by commit 00ea8990aadf ("memory.txt: remove
stray information")
- gpio.txt was moved to gpio/ in commit fd8e198cfcaa ("Documentation:
gpiolib: document new interface")
- networking/DLINK.txt was removed by commit 168e06ae26dd
("drivers/net: delete old parallel port de600/de620 drivers")
- serial/hayes-esp.txt was removed by commit f53a2ade0bb9 ("tty: esp:
remove broken driver")
- s390/TAPE was removed by commit 9e280f669308 ("[S390] remove tape
block docu")
- vm/locking was removed by commit 57ea8171d2bc ("mm: documentation:
remove hopelessly out-of-date locking doc")
- laptops/acer-wmi.txt was remvoed by commit 020036678e81 ("acer-wmi:
Delete out-of-date documentation")Typos/misc issues
- rpc-server-gss.txt was added as knfsd-rpcgss.txt in commit
030d794bf498 ("SUNRPC: Use gssproxy upcall for server RPCGSS
authentication.")
- commit b88cf73d9278 ("net: add missing entries to
Documentation/networking/00-INDEX")
* generic-hdlc.txt was added as generic_hdlc.txt
* spider_net.txt was added as spider-net.txt
- w1/master/mxc-w1 was added as mxc_w1 by commit a5fd9139f74c ("w1: add
1-wire master driver for i.MX27 / i.MX31")
- s390/zfcpdump.txt was added as zfcpdump by commit 6920c12a407e
("[S390] Add Documentation/s390/00-INDEX.")Signed-off-by: Henrik Austad
Reviewed-by: Paul E. McKenney [rcu bits]
Acked-by: Rob Landley
Cc: Jiri Kosina
Cc: Thomas Gleixner
Cc: Rob Herring
Cc: David S. Miller
Cc: Mark Brown
Cc: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Gleb Natapov
Cc: Linus Torvalds
Cc: Len Brown
Cc: James Bottomley
Cc: Jean-Christophe Plagniol-Villard
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Oct, 2013
1 commit
-
- timers-howto was added by commit 0fcb8081 (Documentation: Add
timers/timers-howto.txt)
- NO_HZ was added by commit 0c87f9b5 (nohz_full: Add documentation.)Cc: Patrick Pannuto
Signed-off-by: Henrik Austad
Reviewed-by: Paul E. McKenney
Signed-off-by: Jiri Kosina
19 Aug, 2013
1 commit
-
This commit adds information about testing nohz_full, and also emphasizes
the fact that you need a multi-CPU system to get any benefit from nohz_full.Signed-off-by: Paul E. McKenney
Acked-by: Frederic Weisbecker
Reviewed-by: Josh Triplett
11 Jun, 2013
2 commits
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This commit calls out the potential for slowing the tick even when there
are multiple runnable processes per CPU, It also points out that current
mainlined version keeps the tick going on at least one CPU even when all
CPUs are otherwise idle. Finally, it notes the need for a 1-HZ tick in
order to calculate CPU load, maintain sched average, compute CFS entity
vruntime, compute avenrun, and carry out load balancing.Signed-off-by: Paul E. McKenney
Reviewed-by: Josh Triplett -
Make it more clear that there are three options, and give hints as
to which of the three is most likely to be useful in different
situations.Reported-by: Sedat Dilek
Signed-off-by: Paul E. McKenney
Reviewed-by: Josh Triplett
28 Apr, 2013
1 commit
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Signed-off-by: Paul E. McKenney
Cc: Frederic Weisbecker
Cc: Steven Rostedt
Cc: Borislav Petkov
Cc: Arjan van de Ven
Cc: Kevin Hilman
Cc: Christoph Lameter
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Olivier Baetz
Reviewed-by: Randy Dunlap
Reviewed-by: Borislav Petkov
Reviewed-by: Kevin Hilman
28 Sep, 2011
1 commit
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There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.Fix these broken references, sometimes by dropping the irrelevant text
they were part of.Signed-off-by: Paul Bolle
Signed-off-by: Jiri Kosina
17 May, 2011
1 commit
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Signed-off-by: Jonathan Neuschäfer
Signed-off-by: Jiri Kosina
02 Nov, 2010
1 commit
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"gadget", "through", "command", "maintain", "maintain", "controller", "address",
"between", "initiali[zs]e", "instead", "function", "select", "already",
"equal", "access", "management", "hierarchy", "registration", "interest",
"relative", "memory", "offset", "already",Signed-off-by: Uwe Kleine-König
Signed-off-by: Jiri Kosina
27 Oct, 2010
1 commit
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$./hpet_example info /dev/hpet
-hpet: executing info
hpet_info: hi_irqfreq 0x0 hi_flags 0x0 hi_hpet 0 hi_timer 2Signed-off-by: Jaswinder Singh Rajput
Cc: Clemens Ladisch
Cc: "Venkatesh Pallipadi (Venki)"
Cc: john stultz
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Aug, 2010
1 commit
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This file seeks to explain the nuances in various delays;
many driver writers are not necessarily familiar with the
various kernel timers, their shortfalls, and quirks. When
faced withndelay, udelay, mdelay, usleep_range, msleep, and msleep_interrubtible
the question "How do I just wait 1 ms for my hardware to
latch?" has the non-intuitive "best" answer:
usleep_range(1000,1500)This patch is followed by a series of checkpatch additions
that seek to help kernel hackers pick the best delay.Signed-off-by: Patrick Pannuto
Cc: apw@canonical.com
Cc: corbet@lwn.net
Cc: arjan@linux.intel.com
Cc: Randy Dunlap
Cc: Andrew Morton
LKML-Reference:
Signed-off-by: Thomas Gleixner
02 Jun, 2010
1 commit
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We should only build hpet_example on x86[-64], where it is implemented.
It can cause build errors on other architectures.Signed-off-by: Randy Dunlap
Reported-by: Heiko Carstens
Cc: Heiko Carstens
Cc: Arjan van de Ven
Signed-off-by: Linus Torvalds
24 May, 2010
1 commit
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Documentation/timers/hpet_example.c: fcntl.h is included more than once.
Documentation/timers/hpet_example.c: signal.h is included more than once.Signed-off-by: Andrea Gelmini
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
13 Mar, 2010
1 commit
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Documentation/timers/hpet.txt:
Expose example and tool source files in the Documentation/timers/ directory in
their own files instead of being buried (almost hidden) in readme/txt files.
This should help to prevent bitrot.This will make them more visible/usable to users who may need
to use them, to developers who may need to test with them, and
to anyone who would fix/update them if they were more visible.Also, if any of these possibly should not be in the kernel tree at
all, it will be clearer that they are here and we can discuss if
they should be removed.Signed-off-by: Randy Dunlap
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Nov, 2009
1 commit
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That URL is out of date. Update it.
Cc: Thomas Gleixner
Cc: Randy Dunlap
Cc: Matt LaPlante
Cc: Jiri Kosina
Signed-off-by: WANG Cong
Acked-by: Matt LaPlante
Signed-off-by: Jiri Kosina
13 Jun, 2009
1 commit
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Fix various typos in documentation txts.
Signed-off-by: Matt LaPlante
Signed-off-by: Jiri Kosina
01 Aug, 2008
1 commit
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Minor /dev/hpet updates and bugfixes:
* Remove dead code, mostly remnants of an incomplete/unusable
kernel interface ... noted when addressing "sparse" warnings:
+ hpet_unregister() and a routine it calls
+ hpet_task and all references, including hpet_task_lock
+ hpet_data.hd_flags (and HPET_DATA_PLATFORM)* Correct and improve boot message:
+ displays *counter* (shared between comparators) bit width,
not *timer* bit widths (which are often mixed)
+ relabel "timers" as "comparators"; this is less confusing,
they are not independent like normal timers are (sigh)
+ display MHz not Hz; it's never less than 10 MHz.* Tighten and correct the userspace interface code
+ don't accidentally program comparators in 64-bit mode using
32-bit values ... always force comparators into 32-bit mode
+ provide the correct bit definition flagging comparators with
periodic capability ... the ABI is unchanged* Update Documentation/hpet.txt
+ be more correct and current
+ expand description a bit
+ don't mention that now-gone kernel interfacePlus, add a FIXME comment for something that could cause big trouble
on systems with more capable HPETs than at least Intel seems to ship.It seems that few folk use this userspace interface; it's not very
usable given the general lack of HPET IRQ routing. I'm told that
the only real point of it any more is to mmap for fast timestamps;
IMO that's handled better through the gettimeofday() vsyscall.Signed-off-by: David Brownell
Acked-by: Clemens Ladisch
Signed-off-by: Ingo Molnar
