From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
corbet@lwn.net, mingo@redhat.com, hpa@zytor.com,
peterz@infradead.org, riel@redhat.com, akpm@linux-foundation.org,
rientjes@google.com, ak@linux.intel.com, mgorman@suse.de,
liwanp@linux.vnet.ibm.com, raistlin@linux.it,
kirill.shutemov@linux.intel.com, atomlin@redhat.com,
avagin@openvz.org, gorcunov@openvz.org,
serge.hallyn@canonical.com, athorlton@sgi.com, oleg@redhat.com,
vdavydov@parallels.com, daeseok.youn@gmail.com,
keescook@chromium.org, yangds.fnst@cn.fujitsu.com,
sbauer@eng.utah.edu, vishnu.ps@samsung.com, axboe@fb.com,
paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, linux-api@vger.kernel.org
Subject: Re: [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice
Date: Tue, 25 Nov 2014 10:46:04 -0700 [thread overview]
Message-ID: <1416937564.3512.15.camel@maggy.simpson.net> (raw)
In-Reply-To: <54749725.3050307@oracle.com>
On Tue, 2014-11-25 at 07:50 -0700, Khalid Aziz wrote:
> It is definitely not an attempt to solve any kind of RT problem.
No no, I'm saying that giving certain tasks special dispensations
effectively elevates them. Temporarily or otherwise, they play by
different rules, will block more deserving tasks, and it's not cut and
dried that that blocking will not do more harm than good.
Is it a clear win to make say some kworker or other global asset wait
when it could have preempted and been gone in usecs? Nope.
-Mike
next prev parent reply other threads:[~2014-11-25 17:46 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 20:56 [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice (was: Pre-emption control for userspace) Khalid Aziz
2014-11-24 22:43 ` Andi Kleen
2014-11-24 23:20 ` Khalid Aziz
2014-11-24 23:35 ` Thomas Gleixner
2014-11-25 2:12 ` Davidlohr Bueso
2014-11-25 4:20 ` Mike Galbraith
2014-11-25 14:50 ` [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice Khalid Aziz
2014-11-25 17:46 ` Mike Galbraith [this message]
2014-11-25 19:38 ` Khalid Aziz
2014-11-25 14:45 ` Khalid Aziz
2014-11-25 18:27 ` Davidlohr Bueso
2014-11-25 19:23 ` Khalid Aziz
2014-11-25 19:40 ` Davidlohr Bueso
2014-11-25 2:03 ` [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice (was: Pre-emption control for userspace) Rik van Riel
2014-11-25 6:30 ` Davidlohr Bueso
2014-11-25 13:38 ` Rik van Riel
2014-11-25 14:52 ` [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice Khalid Aziz
2014-11-25 15:25 ` Rik van Riel
2014-11-25 17:22 ` Khalid Aziz
2014-11-25 17:45 ` Rik van Riel
2014-11-25 10:12 ` [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice (was: Pre-emption control for userspace) Srikar Dronamraju
2014-11-25 14:56 ` [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice Khalid Aziz
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