From: Davidlohr Bueso <dave@stgolabs.net>
To: Jason Baron <jbaron@akamai.com>
Cc: Roman Penyaev <rpenyaev@suse.de>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org
Subject: Re: [RFC PATCH 1/1] epoll: use rwlock in order to reduce ep_poll_callback() contention
Date: Wed, 5 Dec 2018 19:08:18 -0800 [thread overview]
Message-ID: <20181206030818.vu5g3edwl67tg3lc@linux-r8p5> (raw)
In-Reply-To: <45bce871-edfd-c402-acde-2e57e80cc522@akamai.com>
>On 12/3/18 6:02 AM, Roman Penyaev wrote:
>> if (!ep_is_linked(epi)) {
>> - list_add_tail(&epi->rdllink, &ep->rdllist);
>> + /* Reverse ->ovflist, events should be in FIFO */
>> + list_add(&epi->rdllink, &ep->rdllist);
>> ep_pm_stay_awake(epi);
>> }
This should probably a separate patch as it fixes the ordering,
regardless of the rwlock+xchg optimization.
Thanks,
Davidlohr
next prev parent reply other threads:[~2018-12-06 3:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 11:02 [RFC PATCH 1/1] epoll: use rwlock in order to reduce ep_poll_callback() contention Roman Penyaev
2018-12-03 17:34 ` Linus Torvalds
2018-12-04 11:50 ` Roman Penyaev
2018-12-04 23:59 ` Andrea Parri
2018-12-05 11:25 ` Roman Penyaev
2018-12-04 17:23 ` Jason Baron
2018-12-04 19:02 ` Paul E. McKenney
2018-12-05 11:22 ` Roman Penyaev
2018-12-05 11:16 ` Roman Penyaev
2018-12-05 16:38 ` Jason Baron
2018-12-05 20:11 ` Roman Penyaev
2018-12-06 1:54 ` Davidlohr Bueso
2018-12-06 3:08 ` Davidlohr Bueso [this message]
2018-12-06 10:27 ` Roman Penyaev
2018-12-06 4:04 ` Davidlohr Bueso
2018-12-06 10:25 ` Roman Penyaev
2018-12-05 23:46 ` Eric Wong
2018-12-06 10:52 ` Roman Penyaev
2018-12-06 20:35 ` Eric Wong
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