From: Peter Zijlstra <peterz@infradead.org>
To: Cypher Wu <cypher.w@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Kernel rwlock design, Multicore and IGMP
Date: Sat, 13 Nov 2010 23:52:03 +0100 [thread overview]
Message-ID: <1289688723.2109.396.camel@laptop> (raw)
In-Reply-To: <AANLkTikvT=x9eBovn2-m6HLqk7wyXSAR3sc9jCQ0C6mL@mail.gmail.com>
On Thu, 2010-11-11 at 21:49 +0800, Cypher Wu wrote:
> I'm using TILEPro and its rwlock in kernel is a liitle different than
> other platforms. It have a priority for write lock that when tried it
> will block the following read lock even if read lock is hold by
> others.
That's a bug, rwlock_t must most definitely be a read preference lock,
there's tons of code depending on that.
prev parent reply other threads:[~2010-11-13 22:51 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-11 13:49 Kernel rwlock design, Multicore and IGMP Cypher Wu
2010-11-11 15:23 ` Eric Dumazet
2010-11-11 15:32 ` Eric Dumazet
2010-11-12 3:32 ` Cypher Wu
2010-11-12 6:28 ` Américo Wang
2010-11-12 7:13 ` Américo Wang
2010-11-12 7:27 ` Eric Dumazet
2010-11-12 8:19 ` Américo Wang
2010-11-12 9:09 ` Yong Zhang
2010-11-12 9:18 ` Américo Wang
2010-11-12 11:06 ` Cypher Wu
2010-11-13 6:35 ` Américo Wang
2010-11-12 13:00 ` Yong Zhang
2010-11-13 6:28 ` Américo Wang
2010-11-12 9:22 ` Eric Dumazet
2010-11-12 9:33 ` Américo Wang
2010-11-12 13:34 ` [PATCH net-next-2.6] igmp: RCU conversion of in_dev->mc_list Eric Dumazet
2010-11-12 14:26 ` Eric Dumazet
2010-11-12 15:46 ` [PATCH net-next-2.6 V2] " Eric Dumazet
2010-11-12 21:19 ` David Miller
2010-11-13 6:44 ` Américo Wang
2010-11-13 22:54 ` Kernel rwlock design, Multicore and IGMP Peter Zijlstra
2010-11-12 11:10 ` Cypher Wu
2010-11-12 11:25 ` Eric Dumazet
2010-11-13 22:53 ` Peter Zijlstra
[not found] ` <ZXmP8hjgLHA.4648@exchange1.tad.internal.tilera.com>
2010-11-13 23:03 ` Chris Metcalf
2010-11-15 7:22 ` Cypher Wu
2010-11-15 11:18 ` Cypher Wu
2010-11-15 11:31 ` Eric Dumazet
2010-11-17 1:30 ` Cypher Wu
2010-11-17 4:43 ` Eric Dumazet
2010-11-15 14:18 ` [PATCH] arch/tile: fix rwlock so would-be write lockers don't block new readers Chris Metcalf
2010-11-15 14:52 ` Eric Dumazet
2010-11-15 15:10 ` Chris Metcalf
2010-11-22 5:39 ` Cypher Wu
2010-11-22 13:35 ` Chris Metcalf
2010-11-23 1:36 ` Cypher Wu
2010-11-23 21:02 ` Chris Metcalf
2010-11-24 2:53 ` Cypher Wu
2010-11-24 14:09 ` Chris Metcalf
2010-11-24 16:37 ` Cypher Wu
2010-11-13 22:52 ` Peter Zijlstra [this message]
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