From: Manfred Spraul <manfred@colorfullife.com>
To: benh@kernel.crashing.org, paulmck@linux.vnet.ibm.com,
Ingo Molnar <mingo@elte.hu>, Boqun Feng <boqun.feng@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
1vier1@web.de, Davidlohr Bueso <dave@stgolabs.net>,
Manfred Spraul <manfred@colorfullife.com>
Subject: [PATCH 0/4] Clarify/standardize memory barriers for lock/unlock
Date: Sun, 28 Aug 2016 13:56:12 +0200 [thread overview]
Message-ID: <1472385376-8801-1-git-send-email-manfred@colorfullife.com> (raw)
Hi,
as discussed before:
If a high-scalability locking scheme is built with multiple
spinlocks, then often additional memory barriers are required.
The documentation was not as clear as possible, and memory
barriers were missing / superfluous in the implementation.
Patch 1: Documentation, define one standard barrier, update ipc/sem.c
Patch 2: Update rcutree
Patch 3: Update nf_conntrack
Patch 4: Update for qspinlock: smp_mb__after_spin_lock is free.
Patch 3 is larger than required, it rewrites the conntrack logic
with the code from ipc/sem.c. I think the new code is simpler
and more realtime-friendly.
Please review!
@Andrew: The patches are relative to mmots.
Could you include them in your tree, with the target of including in
linux-next?
--
Manfred
next reply other threads:[~2016-08-28 11:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-28 11:56 Manfred Spraul [this message]
2016-08-28 11:56 ` [PATCH 1/4] spinlock: Document memory barrier rules Manfred Spraul
2016-08-28 11:56 ` [PATCH 2/4] barrier.h: Move smp_mb__after_unlock_lock to barrier.h Manfred Spraul
2016-08-28 11:56 ` [PATCH 3/4] net/netfilter/nf_conntrack_core: update memory barriers Manfred Spraul
2016-08-28 11:56 ` [PATCH 4/4] qspinlock for x86: smp_mb__after_spin_lock() is free Manfred Spraul
2016-08-29 10:52 ` Peter Zijlstra
2016-08-29 10:51 ` [PATCH 3/4] net/netfilter/nf_conntrack_core: update memory barriers Peter Zijlstra
2016-08-28 13:43 ` [PATCH 2/4] barrier.h: Move smp_mb__after_unlock_lock to barrier.h Paul E. McKenney
2016-08-28 16:31 ` Manfred Spraul
2016-08-28 18:00 ` Manfred Spraul
2016-08-28 14:41 ` kbuild test robot
2016-08-28 17:43 ` [PATCH 2/4 v3] spinlock.h: Move smp_mb__after_unlock_lock to spinlock.h Manfred Spraul
2016-08-29 10:48 ` [PATCH 1/4] spinlock: Document memory barrier rules Peter Zijlstra
2016-08-29 12:54 ` Manfred Spraul
2016-08-29 13:44 ` Peter Zijlstra
2016-08-31 4:59 ` Manfred Spraul
2016-08-31 15:40 ` Peter Zijlstra
2016-08-31 16:40 ` Will Deacon
2016-08-31 18:32 ` Manfred Spraul
2016-09-01 8:44 ` Peter Zijlstra
2016-09-01 11:04 ` Manfred Spraul
2016-09-01 11:19 ` Will Deacon
2016-09-01 11:51 ` Peter Zijlstra
2016-09-01 14:05 ` Boqun Feng
2016-08-29 10:53 ` [PATCH 0/4] Clarify/standardize memory barriers for lock/unlock Peter Zijlstra
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