From: willy@linux.intel.com (Matthew Wilcox)
Subject: RFC: Allow block drivers to poll for I/O instead of sleeping
Date: Mon, 24 Jun 2013 23:07:21 -0400 [thread overview]
Message-ID: <20130625030721.GA8211@linux.intel.com> (raw)
In-Reply-To: <20130625001102.GA6623@home.goodmis.org>
On Mon, Jun 24, 2013@08:11:02PM -0400, Steven Rostedt wrote:
> What about hooking into the idle_balance code? That happens if we are
> about to go to idle but before the full schedule switch to the idle
> task.
>
>
> In __schedule(void):
>
> if (unlikely(!rq->nr_running))
> idle_balance(cpu, rq);
That may be a great place to try it from the PoV of the scheduler, but are
you OK with me threading a struct backing_dev_info * all the way through
the scheduler to idle_balance()? :-)
WARNING: multiple messages have this Message-ID (diff)
From: Matthew Wilcox <willy@linux.intel.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Jens Axboe <axboe@kernel.dk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>, Al Viro <viro@zeniv.linux.org.uk>,
Ingo Molnar <mingo@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-nvme@lists.infradead.org,
Linux SCSI List <linux-scsi@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: RFC: Allow block drivers to poll for I/O instead of sleeping
Date: Mon, 24 Jun 2013 23:07:21 -0400 [thread overview]
Message-ID: <20130625030721.GA8211@linux.intel.com> (raw)
In-Reply-To: <20130625001102.GA6623@home.goodmis.org>
On Mon, Jun 24, 2013 at 08:11:02PM -0400, Steven Rostedt wrote:
> What about hooking into the idle_balance code? That happens if we are
> about to go to idle but before the full schedule switch to the idle
> task.
>
>
> In __schedule(void):
>
> if (unlikely(!rq->nr_running))
> idle_balance(cpu, rq);
That may be a great place to try it from the PoV of the scheduler, but are
you OK with me threading a struct backing_dev_info * all the way through
the scheduler to idle_balance()? :-)
next prev parent reply other threads:[~2013-06-25 3:07 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 20:17 RFC: Allow block drivers to poll for I/O instead of sleeping Matthew Wilcox
2013-06-20 20:17 ` Matthew Wilcox
2013-06-23 10:09 ` Ingo Molnar
2013-06-23 10:09 ` Ingo Molnar
2013-06-23 18:29 ` Linus Torvalds
2013-06-23 18:29 ` Linus Torvalds
2013-06-24 7:17 ` Jens Axboe
2013-06-24 7:17 ` Jens Axboe
2013-06-25 0:11 ` Steven Rostedt
2013-06-25 0:11 ` Steven Rostedt
2013-06-25 3:07 ` Matthew Wilcox [this message]
2013-06-25 3:07 ` Matthew Wilcox
2013-06-25 13:57 ` Steven Rostedt
2013-06-25 13:57 ` Steven Rostedt
2013-06-25 14:57 ` Jens Axboe
2013-06-25 14:57 ` Jens Axboe
2013-06-24 8:07 ` Ingo Molnar
2013-06-24 8:07 ` Ingo Molnar
2013-06-25 3:18 ` Matthew Wilcox
2013-06-25 3:18 ` Matthew Wilcox
2013-06-25 7:07 ` Bart Van Assche
2013-06-25 7:07 ` Bart Van Assche
2013-06-25 15:00 ` Jens Axboe
2013-06-25 15:00 ` Jens Axboe
2013-06-27 18:10 ` Rik van Riel
2013-06-27 18:10 ` Rik van Riel
2013-06-23 22:14 ` David Ahern
2013-06-23 22:14 ` David Ahern
2013-06-24 8:21 ` Ingo Molnar
2013-06-24 8:21 ` Ingo Molnar
2013-06-24 7:15 ` Jens Axboe
2013-06-24 7:15 ` Jens Axboe
2013-06-24 8:18 ` Ingo Molnar
2013-06-24 8:18 ` Ingo Molnar
2013-06-25 3:01 ` Matthew Wilcox
2013-06-25 3:01 ` Matthew Wilcox
2013-06-25 14:55 ` Jens Axboe
2013-06-25 14:55 ` Jens Axboe
2013-06-27 18:42 ` Rik van Riel
2013-06-27 18:42 ` Rik van Riel
2013-07-04 1:13 ` Shaohua Li
2013-07-04 1:13 ` Shaohua Li
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