From: "Parag Warudkar" <parag.warudkar@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"akpm@osdl.org" <akpm@osdl.org>, "Ingo Molnar" <mingo@elte.hu>,
"Peter Zijlstra" <peterz@infradead.org>
Subject: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED
Date: Sat, 3 May 2008 20:42:34 -0400 [thread overview]
Message-ID: <82e4877d0805031742o464dd581wd93173d79705ce0d@mail.gmail.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 864 bytes --]
GROUP_SCHED is confirmed to cause unacceptable latencies -
http://lkml.org/lkml/2008/5/2/370.
Besides there is no reason for it to be on by default.
Mark it EXPERIMENTAL and default to no.
Patch also attached.
Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com>
--- linux-2.6/init/Kconfig.orig 2008-05-03 20:14:41.000000000 -0400
+++ linux-2.6/init/Kconfig 2008-05-03 20:29:06.000000000 -0400
@@ -318,7 +318,8 @@
config GROUP_SCHED
bool "Group CPU scheduler"
- default y
+ depends on EXPERIMENTAL
+ default n
help
This feature lets CPU scheduler recognize task groups and control CPU
bandwidth allocation to such task groups.
@@ -326,7 +327,7 @@
config FAIR_GROUP_SCHED
bool "Group scheduling for SCHED_OTHER"
depends on GROUP_SCHED
- default y
+ default GROUP_SCHED
config RT_GROUP_SCHED
bool "Group scheduling for SCHED_RR/FIFO"
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: init_kconfig.patch --]
[-- Type: text/x-diff; name=init_kconfig.patch, Size: 845 bytes --]
GROUP_SCHED is confirmed to cause unacceptable latencies -
http://lkml.org/lkml/2008/5/2/370.
Besides there is no reason for it to be on by default.
Mark it EXPERIMENTAL and default to no.
Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com>
--- linux-2.6/init/Kconfig.orig 2008-05-03 20:14:41.000000000 -0400
+++ linux-2.6/init/Kconfig 2008-05-03 20:29:06.000000000 -0400
@@ -318,7 +318,8 @@
config GROUP_SCHED
bool "Group CPU scheduler"
- default y
+ depends on EXPERIMENTAL
+ default n
help
This feature lets CPU scheduler recognize task groups and control CPU
bandwidth allocation to such task groups.
@@ -326,7 +327,7 @@
config FAIR_GROUP_SCHED
bool "Group scheduling for SCHED_OTHER"
depends on GROUP_SCHED
- default y
+ default GROUP_SCHED
config RT_GROUP_SCHED
bool "Group scheduling for SCHED_RR/FIFO"
next reply other threads:[~2008-05-04 0:42 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-04 0:42 Parag Warudkar [this message]
2008-05-04 9:24 ` [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED Ingo Molnar
2008-05-05 15:14 ` Parag Warudkar
2008-05-05 17:15 ` Ingo Molnar
2008-05-05 18:24 ` Sam Ravnborg
2008-05-05 18:36 ` Sergio Luis
2008-05-05 18:45 ` Ingo Molnar
2008-05-05 19:49 ` [PATCH] kconfig: add support for stdin (make K=- ...) Sam Ravnborg
2008-05-06 3:51 ` Oleg Verych
2008-05-05 19:05 ` [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED Sam Ravnborg
2008-05-05 18:42 ` Ingo Molnar
2008-05-05 19:01 ` Sam Ravnborg
2008-05-05 19:56 ` Arjan van de Ven
2008-05-05 20:27 ` Ingo Molnar
2008-05-05 20:48 ` Linus Torvalds
2008-05-05 21:05 ` Ingo Molnar
2008-05-05 21:40 ` Parag Warudkar
2008-05-25 19:30 ` Roman Zippel
2008-05-05 17:21 ` Ingo Molnar
2008-05-05 17:33 ` Jesse Barnes
2008-05-05 18:36 ` Ingo Molnar
2008-05-05 21:36 ` Parag Warudkar
2008-05-05 21:49 ` Ingo Molnar
2008-05-06 0:38 ` Ingo Molnar
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