From: Peter Zijlstra <peterz@infradead.org>
To: Nicholas Piggin <npiggin@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, Waiman Long <longman@redhat.com>,
Anton Blanchard <anton@ozlabs.org>,
Boqun Feng <boqun.feng@gmail.com>,
kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
virtualization@lists.linux-foundation.org,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH v3 0/6] powerpc: queued spinlocks and rwlocks
Date: Wed, 8 Jul 2020 10:41:06 +0200 [thread overview]
Message-ID: <20200708084106.GE597537@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1594101082.hfq9x5yact.astroid@bobo.none>
On Tue, Jul 07, 2020 at 03:57:06PM +1000, Nicholas Piggin wrote:
> Yes, powerpc could certainly get more performance out of the slow
> paths, and then there are a few parameters to tune.
Can you clarify? The slow path is already in use on ARM64 which is weak,
so I doubt there's superfluous serialization present. And Will spend a
fair amount of time on making that thing guarantee forward progressm, so
there just isn't too much room to play.
> We don't have a good alternate patching for function calls yet, but
> that would be something to do for native vs pv.
Going by your jump_label implementation, support for static_call should
be fairly straight forward too, no?
https://lkml.kernel.org/r/20200624153024.794671356@infradead.org
next prev parent reply other threads:[~2020-07-08 8:41 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 4:35 [PATCH v3 0/6] powerpc: queued spinlocks and rwlocks Nicholas Piggin
2020-07-06 4:35 ` [PATCH v3 1/6] powerpc/powernv: must include hvcall.h to get PAPR defines Nicholas Piggin
2020-07-09 10:05 ` Michael Ellerman
2020-07-06 4:35 ` [PATCH v3 2/6] powerpc/pseries: move some PAPR paravirt functions to their own file Nicholas Piggin
2020-07-09 10:11 ` Michael Ellerman
2020-07-06 4:35 ` [PATCH v3 3/6] powerpc: move spinlock implementation to simple_spinlock Nicholas Piggin
2020-07-09 10:15 ` Michael Ellerman
2020-07-06 4:35 ` [PATCH v3 4/6] powerpc/64s: implement queued spinlocks and rwlocks Nicholas Piggin
2020-07-09 10:20 ` Michael Ellerman
2020-07-09 10:33 ` Peter Zijlstra
2020-07-23 14:37 ` Michal Suchánek
2020-07-06 4:35 ` [PATCH v3 5/6] powerpc/pseries: implement paravirt qspinlocks for SPLPAR Nicholas Piggin
2020-07-09 10:53 ` Michael Ellerman
2020-07-09 11:03 ` Peter Zijlstra
2020-07-09 16:06 ` Waiman Long
2020-07-23 14:00 ` Peter Zijlstra
2020-07-23 18:32 ` Waiman Long
2020-07-23 18:47 ` peterz
2020-07-23 19:04 ` Waiman Long
2020-07-23 19:58 ` peterz
2020-07-23 20:30 ` Segher Boessenkool
2020-07-23 21:58 ` Waiman Long
2020-07-24 8:16 ` Will Deacon
2020-07-24 19:10 ` Waiman Long
2020-07-25 3:02 ` Waiman Long
2020-07-25 17:26 ` Peter Zijlstra
2020-07-25 17:36 ` Waiman Long
2020-07-23 14:09 ` Nicholas Piggin
2020-07-06 4:35 ` [PATCH v3 6/6] powerpc/qspinlock: optimised atomic_try_cmpxchg_lock that adds the lock hint Nicholas Piggin
2020-07-06 18:39 ` [PATCH v3 0/6] powerpc: queued spinlocks and rwlocks Waiman Long
2020-07-07 5:57 ` Nicholas Piggin
2020-07-08 3:33 ` Waiman Long
2020-07-08 5:10 ` Nicholas Piggin
2020-07-08 23:50 ` Waiman Long
2020-07-08 23:58 ` Waiman Long
2020-07-08 8:32 ` Peter Zijlstra
2020-07-08 23:53 ` Waiman Long
2020-07-08 8:41 ` Peter Zijlstra [this message]
2020-07-08 23:54 ` Waiman Long
2020-07-09 8:31 ` Peter Zijlstra
2020-07-21 11:20 ` Nicholas Piggin
2020-07-21 11:08 ` Nicholas Piggin
2020-07-21 14:36 ` Waiman Long
2020-07-23 13:30 ` Nicholas Piggin
2020-07-23 14:29 ` Waiman Long
2020-07-23 16:12 ` Nicholas Piggin
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