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[46.139.12.213]) by smtp.gmail.com with ESMTPSA id j9sm48869748wrr.93.2019.04.12.09.41.25 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 12 Apr 2019 09:41:26 -0700 (PDT) Date: Fri, 12 Apr 2019 18:41:23 +0200 From: Ingo Molnar To: Waiman Long Cc: Peter Zijlstra , Ingo Molnar , Will Deacon , Thomas Gleixner , linux-kernel@vger.kernel.org, x86@kernel.org, Davidlohr Bueso , Linus Torvalds , Tim Chen , huang ying Subject: Re: [PATCH-tip v3 02/14] locking/rwsem: Make owner available even if !CONFIG_RWSEM_SPIN_ON_OWNER Message-ID: <20190412164123.GA119547@gmail.com> References: <20190410184231.6748-1-longman@redhat.com> <20190410184231.6748-3-longman@redhat.com> <20190411081224.GB4038@hirez.programming.kicks-ass.net> <29aca54a-536e-6e46-7e18-658914c34548@redhat.com> <20190412070209.GC129493@gmail.com> <20190412070545.GF11158@hirez.programming.kicks-ass.net> <20190412070904.GA45214@gmail.com> <33b0111b-fe0f-eefc-59f4-f06d84d9cacc@redhat.com> <277e9c8e-8913-b251-4c98-dd2d4997d643@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <277e9c8e-8913-b251-4c98-dd2d4997d643@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Waiman Long wrote: > > BTW, the v3 patch that I posted yesterday should work fine as long as > > CONFIG_RWSEM_SPIN_ON_OWNER is defined. > > > > Cheers, > > Longman > > > Oh, I see that the WIP.locking/core is currently merged into master. I > would say rwsem part1 patchset and patch 1 of part2 are stable. So I > would suggest merging those into the the master will be good. The rests > are still under review until I get an OK from Peter. If they miss the > next merge window and have to postpone to 5.3, I am fine with that. So beyond the primary constraint of PeterZ OK-ing it all, there's also these two scalability regression reports from the ktest bot: [locking/rwsem] 1b94536f2d: stress-ng.bad-altstack.ops_per_sec -32.7% regression [locking/rwsem] adc32e8877: will-it-scale.per_thread_ops -21.0% regression Thanks, Ingo