<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/Documentation/scheduler, branch v3.13</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge tag 'h8300-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging</title>
<updated>2013-11-12T05:13:14+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2013-11-12T05:13:14+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=4b4d2b463461f1b86fd89353184e6f2938e7566b'/>
<id>4b4d2b463461f1b86fd89353184e6f2938e7566b</id>
<content type='text'>
Pull h8300 platform removal from Guenter Roeck:
 "The patch series has been in -next for more than one relase cycle.  I
  did get a number of Acks, and no objections.

  H8/300 has been dead for several years, the kernel for it has not
  compiled for ages, and recent versions of gcc for it are broken.
  Remove support for it"

* tag 'h8300-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  CREDITS: Add Yoshinori Sato for h8300
  fs/minix: Drop dependency on H8300
  Drop remaining references to H8/300 architecture
  Drop MAINTAINERS entry for H8/300
  watchdog: Drop references to H8300 architecture
  net/ethernet: Drop H8/300 Ethernet driver
  net/ethernet: smsc9194: Drop conditional code for H8/300
  ide: Drop H8/300 driver
  Drop support for Renesas H8/300 (h8300) architecture
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull h8300 platform removal from Guenter Roeck:
 "The patch series has been in -next for more than one relase cycle.  I
  did get a number of Acks, and no objections.

  H8/300 has been dead for several years, the kernel for it has not
  compiled for ages, and recent versions of gcc for it are broken.
  Remove support for it"

* tag 'h8300-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  CREDITS: Add Yoshinori Sato for h8300
  fs/minix: Drop dependency on H8300
  Drop remaining references to H8/300 architecture
  Drop MAINTAINERS entry for H8/300
  watchdog: Drop references to H8300 architecture
  net/ethernet: Drop H8/300 Ethernet driver
  net/ethernet: smsc9194: Drop conditional code for H8/300
  ide: Drop H8/300 driver
  Drop support for Renesas H8/300 (h8300) architecture
</pre>
</div>
</content>
</entry>
<entry>
<title>Drop support for Renesas H8/300 (h8300) architecture</title>
<updated>2013-09-17T01:19:04+00:00</updated>
<author>
<name>Guenter Roeck</name>
<email>linux@roeck-us.net</email>
</author>
<published>2013-08-30T13:01:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=4b08478422040ae8cb11acc15d51f1cdb0ac39c8'/>
<id>4b08478422040ae8cb11acc15d51f1cdb0ac39c8</id>
<content type='text'>
H8/300 has been dead for several years, and the kernel for it
has not compiled for ages. Drop support for it.

Cc: Yoshinori Sato &lt;ysato@users.sourceforge.jp&gt;
Acked-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Guenter Roeck &lt;linux@roeck-us.net&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
H8/300 has been dead for several years, and the kernel for it
has not compiled for ages. Drop support for it.

Cc: Yoshinori Sato &lt;ysato@users.sourceforge.jp&gt;
Acked-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Signed-off-by: Guenter Roeck &lt;linux@roeck-us.net&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched/Documentation: Update sched-design-CFS.txt documentation</title>
<updated>2013-09-12T17:14:17+00:00</updated>
<author>
<name>Li Bin</name>
<email>huawei.libin@huawei.com</email>
</author>
<published>2013-09-09T06:05:40+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=3b524d60943a2f9ee1194323ff9d5ee01a4d1ce1'/>
<id>3b524d60943a2f9ee1194323ff9d5ee01a4d1ce1</id>
<content type='text'>
2bd2d6f2dc ("sched: Replace use of entity_key()") had remove the
entity_key() which function is to subtract a tasks vruntime by
its groups minvruntime as the rbtree key.
The phrase "there is a subtraction using rq-&gt;cfs.min_vruntime
to account for possible wraparounds" in documentation feels strange
and meaningless. So remove it.

Signed-off-by: Li Bin &lt;huawei.libin@huawei.com&gt;
Signed-off-by: Peter Zijlstra &lt;peterz@infradead.org&gt;
Link: http://lkml.kernel.org/r/1378706740-7500-1-git-send-email-huawei.libin@huawei.com
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
2bd2d6f2dc ("sched: Replace use of entity_key()") had remove the
entity_key() which function is to subtract a tasks vruntime by
its groups minvruntime as the rbtree key.
The phrase "there is a subtraction using rq-&gt;cfs.min_vruntime
to account for possible wraparounds" in documentation feels strange
and meaningless. So remove it.

Signed-off-by: Li Bin &lt;huawei.libin@huawei.com&gt;
Signed-off-by: Peter Zijlstra &lt;peterz@infradead.org&gt;
Link: http://lkml.kernel.org/r/1378706740-7500-1-git-send-email-huawei.libin@huawei.com
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Rename sched.c as sched/core.c in comments and Documentation</title>
<updated>2013-06-19T10:58:42+00:00</updated>
<author>
<name>Viresh Kumar</name>
<email>viresh.kumar@linaro.org</email>
</author>
<published>2013-06-04T07:40:24+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=0a0fca9d832b704f116a25badd1ca8c16771dcac'/>
<id>0a0fca9d832b704f116a25badd1ca8c16771dcac</id>
<content type='text'>
Most of the stuff from kernel/sched.c was moved to kernel/sched/core.c long time
back and the comments/Documentation never got updated.

I figured it out when I was going through sched-domains.txt and so thought of
fixing it globally.

I haven't crossed check if the stuff that is referenced in sched/core.c by all
these files is still present and hasn't changed as that wasn't the motive behind
this patch.

Signed-off-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Signed-off-by: Peter Zijlstra &lt;peterz@infradead.org&gt;
Link: http://lkml.kernel.org/r/cdff76a265326ab8d71922a1db5be599f20aad45.1370329560.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Most of the stuff from kernel/sched.c was moved to kernel/sched/core.c long time
back and the comments/Documentation never got updated.

I figured it out when I was going through sched-domains.txt and so thought of
fixing it globally.

I haven't crossed check if the stuff that is referenced in sched/core.c by all
these files is still present and hasn't changed as that wasn't the motive behind
this patch.

Signed-off-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Signed-off-by: Peter Zijlstra &lt;peterz@infradead.org&gt;
Link: http://lkml.kernel.org/r/cdff76a265326ab8d71922a1db5be599f20aad45.1370329560.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW</title>
<updated>2012-09-13T14:52:04+00:00</updated>
<author>
<name>Peter Zijlstra</name>
<email>a.p.zijlstra@chello.nl</email>
</author>
<published>2012-09-12T09:22:00+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=f3e947867478af9a12b9956bcd000ac7613a8a95'/>
<id>f3e947867478af9a12b9956bcd000ac7613a8a95</id>
<content type='text'>
Now that the last architecture to use this has stopped doing so (ARM,
thanks Catalin!) we can remove this complexity from the scheduler
core.

Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Cc: Oleg Nesterov &lt;oleg@redhat.com&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Link: http://lkml.kernel.org/n/tip-g9p2a1w81xxbrze25v9zpzbf@git.kernel.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Now that the last architecture to use this has stopped doing so (ARM,
thanks Catalin!) we can remove this complexity from the scheduler
core.

Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Cc: Oleg Nesterov &lt;oleg@redhat.com&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Link: http://lkml.kernel.org/n/tip-g9p2a1w81xxbrze25v9zpzbf@git.kernel.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Remove stale power aware scheduling remnants and dysfunctional knobs</title>
<updated>2012-05-17T11:48:56+00:00</updated>
<author>
<name>Peter Zijlstra</name>
<email>peterz@infradead.org</email>
</author>
<published>2012-01-09T10:28:35+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=8e7fbcbc22c12414bcc9dfdd683637f58fb32759'/>
<id>8e7fbcbc22c12414bcc9dfdd683637f58fb32759</id>
<content type='text'>
It's been broken forever (i.e. it's not scheduling in a power
aware fashion), as reported by Suresh and others sending
patches, and nobody cares enough to fix it properly ...
so remove it to make space free for something better.

There's various problems with the code as it stands today, first
and foremost the user interface which is bound to topology
levels and has multiple values per level. This results in a
state explosion which the administrator or distro needs to
master and almost nobody does.

Furthermore large configuration state spaces aren't good, it
means the thing doesn't just work right because it's either
under so many impossibe to meet constraints, or even if
there's an achievable state workloads have to be aware of
it precisely and can never meet it for dynamic workloads.

So pushing this kind of decision to user-space was a bad idea
even with a single knob - it's exponentially worse with knobs
on every node of the topology.

There is a proposal to replace the user interface with a single
3 state knob:

 sched_balance_policy := { performance, power, auto }

where 'auto' would be the preferred default which looks at things
like Battery/AC mode and possible cpufreq state or whatever the hw
exposes to show us power use expectations - but there's been no
progress on it in the past many months.

Aside from that, the actual implementation of the various knobs
is known to be broken. There have been sporadic attempts at
fixing things but these always stop short of reaching a mergable
state.

Therefore this wholesale removal with the hopes of spurring
people who care to come forward once again and work on a
coherent replacement.

Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Cc: Suresh Siddha &lt;suresh.b.siddha@intel.com&gt;
Cc: Arjan van de Ven &lt;arjan@linux.intel.com&gt;
Cc: Vincent Guittot &lt;vincent.guittot@linaro.org&gt;
Cc: Vaidyanathan Srinivasan &lt;svaidy@linux.vnet.ibm.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Link: http://lkml.kernel.org/r/1326104915.2442.53.camel@twins
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
It's been broken forever (i.e. it's not scheduling in a power
aware fashion), as reported by Suresh and others sending
patches, and nobody cares enough to fix it properly ...
so remove it to make space free for something better.

There's various problems with the code as it stands today, first
and foremost the user interface which is bound to topology
levels and has multiple values per level. This results in a
state explosion which the administrator or distro needs to
master and almost nobody does.

Furthermore large configuration state spaces aren't good, it
means the thing doesn't just work right because it's either
under so many impossibe to meet constraints, or even if
there's an achievable state workloads have to be aware of
it precisely and can never meet it for dynamic workloads.

So pushing this kind of decision to user-space was a bad idea
even with a single knob - it's exponentially worse with knobs
on every node of the topology.

There is a proposal to replace the user interface with a single
3 state knob:

 sched_balance_policy := { performance, power, auto }

where 'auto' would be the preferred default which looks at things
like Battery/AC mode and possible cpufreq state or whatever the hw
exposes to show us power use expectations - but there's been no
progress on it in the past many months.

Aside from that, the actual implementation of the various knobs
is known to be broken. There have been sporadic attempts at
fixing things but these always stop short of reaching a mergable
state.

Therefore this wholesale removal with the hopes of spurring
people who care to come forward once again and work on a
coherent replacement.

Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Cc: Suresh Siddha &lt;suresh.b.siddha@intel.com&gt;
Cc: Arjan van de Ven &lt;arjan@linux.intel.com&gt;
Cc: Vincent Guittot &lt;vincent.guittot@linaro.org&gt;
Cc: Vaidyanathan Srinivasan &lt;svaidy@linux.vnet.ibm.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Link: http://lkml.kernel.org/r/1326104915.2442.53.camel@twins
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Update documentation and comments</title>
<updated>2012-05-07T13:04:18+00:00</updated>
<author>
<name>Hiroshi Shimamoto</name>
<email>h-shimamoto@ct.jp.nec.com</email>
</author>
<published>2012-04-02T08:00:44+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=489a71b029cd94e3b0132795146e8be3a87bf3fa'/>
<id>489a71b029cd94e3b0132795146e8be3a87bf3fa</id>
<content type='text'>
Change sched_*.c to sched/*.c in documentation and comments.

Signed-off-by: Hiroshi Shimamoto &lt;h-shimamoto@ct.jp.nec.com&gt;
Cc: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/4F795CAC.9080206@ct.jp.nec.com
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Change sched_*.c to sched/*.c in documentation and comments.

Signed-off-by: Hiroshi Shimamoto &lt;h-shimamoto@ct.jp.nec.com&gt;
Cc: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/4F795CAC.9080206@ct.jp.nec.com
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Remove sched_switch</title>
<updated>2012-01-27T12:28:53+00:00</updated>
<author>
<name>Rakib Mullick</name>
<email>rakib.mullick@gmail.com</email>
</author>
<published>2012-01-24T16:33:56+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=30fd049afcfed50e022704036e8629d6bdfe84e6'/>
<id>30fd049afcfed50e022704036e8629d6bdfe84e6</id>
<content type='text'>
Currently we don't utilize the sched_switch field anymore.

But, simply removing sched_switch field from the middle of the
sched_stat output will break tools.

So, to stay compatible we hardcode it to zero and remove the
field from the scheduler data structures.

Update the schedstat documentation accordingly.

Signed-off-by: Rakib Mullick &lt;rakib.mullick@gmail.com&gt;
Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/1327422836.27181.5.camel@localhost.localdomain
Signed-off-by: Ingo Molnar &lt;mingo@elte.hu&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Currently we don't utilize the sched_switch field anymore.

But, simply removing sched_switch field from the middle of the
sched_stat output will break tools.

So, to stay compatible we hardcode it to zero and remove the
field from the scheduler data structures.

Update the schedstat documentation accordingly.

Signed-off-by: Rakib Mullick &lt;rakib.mullick@gmail.com&gt;
Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/1327422836.27181.5.camel@localhost.localdomain
Signed-off-by: Ingo Molnar &lt;mingo@elte.hu&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>sched: Add documentation for bandwidth control</title>
<updated>2011-08-14T10:03:58+00:00</updated>
<author>
<name>Bharata B Rao</name>
<email>bharata@linux.vnet.ibm.com</email>
</author>
<published>2011-07-21T16:43:43+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=88ebc08ea9f721d1345d5414288a308ea42ac458'/>
<id>88ebc08ea9f721d1345d5414288a308ea42ac458</id>
<content type='text'>
Basic description of usage and effect for CFS Bandwidth Control.

Signed-off-by: Bharata B Rao &lt;bharata@linux.vnet.ibm.com&gt;
Signed-off-by: Paul Turner &lt;pjt@google.com&gt;
Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/20110721184758.498036116@google.com
Signed-off-by: Ingo Molnar &lt;mingo@elte.hu&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Basic description of usage and effect for CFS Bandwidth Control.

Signed-off-by: Bharata B Rao &lt;bharata@linux.vnet.ibm.com&gt;
Signed-off-by: Paul Turner &lt;pjt@google.com&gt;
Signed-off-by: Peter Zijlstra &lt;a.p.zijlstra@chello.nl&gt;
Link: http://lkml.kernel.org/r/20110721184758.498036116@google.com
Signed-off-by: Ingo Molnar &lt;mingo@elte.hu&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge branch 'master' into for-next</title>
<updated>2011-07-11T12:15:55+00:00</updated>
<author>
<name>Jiri Kosina</name>
<email>jkosina@suse.cz</email>
</author>
<published>2011-07-11T12:15:48+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=b7e9c223be8ce335e30f2cf6ba588e6a4092275c'/>
<id>b7e9c223be8ce335e30f2cf6ba588e6a4092275c</id>
<content type='text'>
Sync with Linus' tree to be able to apply pending patches that
are based on newer code already present upstream.
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Sync with Linus' tree to be able to apply pending patches that
are based on newer code already present upstream.
</pre>
</div>
</content>
</entry>
</feed>
