lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 9 Jul 2020 12:33:38 +0200 From: Peter Zijlstra <peterz@...radead.org> To: Michael Ellerman <mpe@...erman.id.au> Cc: Nicholas Piggin <npiggin@...il.com>, linuxppc-dev@...ts.ozlabs.org, Will Deacon <will@...nel.org>, Boqun Feng <boqun.feng@...il.com>, Ingo Molnar <mingo@...hat.com>, Waiman Long <longman@...hat.com>, Anton Blanchard <anton@...abs.org>, linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, kvm-ppc@...r.kernel.org, linux-arch@...r.kernel.org Subject: Re: [PATCH v3 4/6] powerpc/64s: implement queued spinlocks and rwlocks On Thu, Jul 09, 2020 at 08:20:25PM +1000, Michael Ellerman wrote: > Nicholas Piggin <npiggin@...il.com> writes: > > These have shown significantly improved performance and fairness when > > spinlock contention is moderate to high on very large systems. > > > > [ Numbers hopefully forthcoming after more testing, but initial > > results look good ] > > Would be good to have something here, even if it's preliminary. > > > Thanks to the fast path, single threaded performance is not noticably > > hurt. > > > > Signed-off-by: Nicholas Piggin <npiggin@...il.com> > > --- > > arch/powerpc/Kconfig | 13 ++++++++++++ > > arch/powerpc/include/asm/Kbuild | 2 ++ > > arch/powerpc/include/asm/qspinlock.h | 25 +++++++++++++++++++++++ > > arch/powerpc/include/asm/spinlock.h | 5 +++++ > > arch/powerpc/include/asm/spinlock_types.h | 5 +++++ > > arch/powerpc/lib/Makefile | 3 +++ > > > include/asm-generic/qspinlock.h | 2 ++ > > Who's ack do we need for that part? Mine I suppose would do, as discussed earlier, it probably isn't required anymore, but I understand the paranoia of not wanting to change too many things at once :-) Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Powered by blists - more mailing lists