From: Daniel Bristot de Oliveira <bristot@redhat.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Juri Lelli <juri.lelli@redhat.com>
Cc: peterz@infradead.org, mingo@redhat.com, rostedt@goodmis.org,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
luca.abeni@santannapisa.it, claudio@evidence.eu.com,
tommaso.cucinotta@santannapisa.it, alessio.balsini@gmail.com,
will.deacon@arm.com, andrea.parri@amarulasolutions.com,
dietmar.eggemann@arm.com, patrick.bellasi@arm.com,
henrik@austad.us, linux-rt-users@vger.kernel.org
Subject: Re: [RFD/RFC PATCH 0/8] Towards implementing proxy execution
Date: Tue, 9 Oct 2018 13:56:40 +0200 [thread overview]
Message-ID: <9837aa4b-1bd4-bc6a-84f7-0b8704995d44@redhat.com> (raw)
In-Reply-To: <20181009105112.bhqlrabdt5ae5qmm@linutronix.de>
On 10/9/18 12:51 PM, Sebastian Andrzej Siewior wrote:
>> The main concerns I have with the current approach is that, being based
>> on mutex.c, it's both
>>
>> - not linked with futexes
>> - not involving "legacy" priority inheritance (rt_mutex.c)
>>
>> I believe one of the main reasons Peter started this on mutexes is to
>> have better coverage of potential problems (which I can assure everybody
>> it had). I'm not yet sure what should we do moving forward, and this is
>> exactly what I'd be pleased to hear your opinions on.
> wasn't the idea that once it works to get rid of rt_mutex?
As far as I know, it is. But there are some additional complexity
involving a -rt version of this patch, for instance:
What should the protocol do if the thread migrating is with migration
disabled?
The side effects of, for instance, ignoring the migrate_disable() would
add noise for the initial implementation... too much complexity at once.
IMHO, once it works in the non-rt, it will be easier to do the changes
needed to integrate it with -rt.
Thoughts?
-- Daniel
next prev parent reply other threads:[~2018-10-09 11:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-09 9:24 [RFD/RFC PATCH 0/8] Towards implementing proxy execution Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 1/8] locking/mutex: Convert mutex::wait_lock to raw_spinlock_t Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 2/8] locking/mutex: Removes wakeups from under mutex::wait_lock Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 3/8] locking/mutex: Rework task_struct::blocked_on Juri Lelli
2018-10-10 10:43 ` luca abeni
2018-10-10 11:06 ` Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 4/8] sched: Split scheduler execution context Juri Lelli
2019-05-06 11:06 ` Claudio Scordino
2018-10-09 9:24 ` [RFD/RFC PATCH 5/8] sched: Add proxy execution Juri Lelli
2018-10-10 11:10 ` luca abeni
2018-10-11 12:34 ` Juri Lelli
2018-10-11 12:53 ` Peter Zijlstra
2018-10-11 13:42 ` Juri Lelli
2018-10-12 7:22 ` luca abeni
2018-10-12 8:30 ` Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 6/8] locking/mutex: make mutex::wait_lock irq safe Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 7/8] sched: Ensure blocked_on is always guarded by blocked_lock Juri Lelli
2018-10-09 9:24 ` [RFD/RFC PATCH 8/8] sched: Fixup task CPUs for potential proxies Juri Lelli
2018-10-09 9:44 ` [RFD/RFC PATCH 0/8] Towards implementing proxy execution Peter Zijlstra
2018-10-09 9:58 ` Juri Lelli
2018-10-09 10:51 ` Sebastian Andrzej Siewior
2018-10-09 11:56 ` Daniel Bristot de Oliveira [this message]
2018-10-09 12:35 ` Juri Lelli
2018-10-10 10:34 ` luca abeni
2018-10-10 10:57 ` Peter Zijlstra
2018-10-10 11:16 ` luca abeni
2018-10-10 11:23 ` Peter Zijlstra
2018-10-10 12:27 ` Juri Lelli
2018-10-10 11:56 ` Henrik Austad
2018-10-10 12:24 ` Peter Zijlstra
2018-10-10 13:48 ` Daniel Bristot de Oliveira
2018-10-10 12:36 ` Juri Lelli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9837aa4b-1bd4-bc6a-84f7-0b8704995d44@redhat.com \
--to=bristot@redhat.com \
--cc=alessio.balsini@gmail.com \
--cc=andrea.parri@amarulasolutions.com \
--cc=bigeasy@linutronix.de \
--cc=claudio@evidence.eu.com \
--cc=dietmar.eggemann@arm.com \
--cc=henrik@austad.us \
--cc=juri.lelli@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=luca.abeni@santannapisa.it \
--cc=mingo@redhat.com \
--cc=patrick.bellasi@arm.com \
--cc=peterz@infradead.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tommaso.cucinotta@santannapisa.it \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).