From: "Huang\, Ying" <ying.huang@intel.com>
To: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, <linux-mm@kvack.org>,
<linux-kernel@vger.kernel.org>, Hugh Dickins <hughd@google.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Minchan Kim <minchan@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Tim Chen <tim.c.chen@linux.intel.com>,
Mel Gorman <mgorman@techsingularity.net>,
Jérôme Glisse <jglisse@redhat.com>,
Michal Hocko <mhocko@suse.com>,
Andrea Arcangeli <aarcange@redhat.com>,
David Rientjes <rientjes@google.com>,
Rik van Riel <riel@redhat.com>, Jan Kara <jack@suse.cz>,
Dave Jiang <dave.jiang@intel.com>,
Daniel Jordan <daniel.m.jordan@oracle.com>
Subject: Re: [PATCH -mm -V7] mm, swap: fix race between swapoff and some swap operations
Date: Fri, 15 Feb 2019 14:34:09 +0800 [thread overview]
Message-ID: <87a7ixblwe.fsf@yhuang-dev.intel.com> (raw)
In-Reply-To: <20190212101316.GA6905@andrea> (Andrea Parri's message of "Tue, 12 Feb 2019 11:13:16 +0100")
Andrea Parri <andrea.parri@amarulasolutions.com> writes:
>> Alternative implementation could be replacing disable preemption with
>> rcu_read_lock_sched and stop_machine() with synchronize_sched().
>
> JFYI, starting with v4.20-rc1, synchronize_rcu{,expedited}() also wait
> for preempt-disable sections (the intent seems to retire the RCU-sched
> update-side API), so that here you could instead use preempt-disable +
> synchronize_rcu{,expedited}(). This LWN article gives an overview of
> the latest RCU API/semantics changes: https://lwn.net/Articles/777036/.
Thanks a lot! The article is really helpful!
Best Regards,
Huang, Ying
> Andrea
next prev parent reply other threads:[~2019-02-15 6:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 8:38 Huang, Ying
2019-02-11 19:06 ` Daniel Jordan
2019-02-12 3:21 ` Andrea Parri
2019-02-12 6:47 ` Huang, Ying
2019-02-12 17:58 ` Tim Chen
2019-02-13 3:23 ` Huang, Ying
2019-02-12 20:06 ` Daniel Jordan
2019-02-12 6:40 ` Huang, Ying
2019-02-12 10:13 ` Andrea Parri
2019-02-15 6:34 ` Huang, Ying [this message]
2019-02-14 2:38 ` Andrea Arcangeli
2019-02-14 8:07 ` Huang, Ying
2019-02-14 21:47 ` Andrea Arcangeli
2019-02-15 7:50 ` Huang, Ying
2019-02-14 14:33 ` Michal Hocko
2019-02-14 20:30 ` Andrew Morton
2019-02-14 21:22 ` Andrea Arcangeli
2019-02-15 7:08 ` Huang, Ying
2019-02-15 13:11 ` Michal Hocko
2019-02-18 0:51 ` Huang, Ying
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