From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Julia Cartwright <julia@ni.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Al Viro <viro@zeniv.linux.org.uk>,
John Ogness <john.ogness@linutronix.de>,
Will Deacon <will.deacon@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Gratian Crisan <gratian.crisan@ni.com>,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
stable-rt@vger.kernel.org
Subject: Re: [PATCH RT] seqlock: provide the same ordering semantics as mainline
Date: Mon, 28 May 2018 17:30:32 +0200 [thread overview]
Message-ID: <20180528153032.pdhl6kaiwruulh7r@linutronix.de> (raw)
In-Reply-To: <20180426200203.11560-1-julia@ni.com>
On 2018-04-26 15:02:03 [-0500], Julia Cartwright wrote:
> The mainline implementation of read_seqbegin() orders prior loads w.r.t.
> the read-side critical section. Fixup the RT writer-boosting
> implementation to provide the same guarantee.
>
> Also, while we're here, update the usage of ACCESS_ONCE() to use
> READ_ONCE().
I'm taking this without the READ_ONCE hunk because ACCESS_ONCE is gone
since v4.15 and I had to move on in v4.16.
> Fixes: e69f15cf77c23 ("seqlock: Prevent rt starvation")
> Cc: stable-rt@vger.kernel.org
> Signed-off-by: Julia Cartwright <julia@ni.com>
Sebastian
prev parent reply other threads:[~2018-05-28 15:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180426192258.GK12238@jcartwri.amer.corp.natinst.com>
2018-04-26 20:02 ` Julia Cartwright
2018-05-28 15:30 ` Sebastian Andrzej Siewior [this message]
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=20180528153032.pdhl6kaiwruulh7r@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=gratian.crisan@ni.com \
--cc=john.ogness@linutronix.de \
--cc=julia@ni.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=stable-rt@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=viro@zeniv.linux.org.uk \
--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
all inboxes | Powered by JetHome®