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Sun, 09 Mar 2025 21:34:04 -0700 (PDT) Received: from ghost ([2601:647:6700:64d0:677:c5f4:a978:3253]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22410a7f999sm67389125ad.141.2025.03.09.21.34.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Mar 2025 21:34:03 -0700 (PDT) Date: Sun, 9 Mar 2025 21:34:00 -0700 From: Charlie Jenkins To: Thomas Gleixner Cc: Paul Walmsley , Palmer Dabbelt , Huacai Chen , WANG Xuerui , Peter Zijlstra , Andy Lutomirski , Alexandre Ghiti , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev Subject: Re: [PATCH v5 4/4] entry: Inline syscall_exit_to_user_mode() Message-ID: References: <20250305-riscv_optimize_entry-v5-0-6507b5dff3ce@rivosinc.com> <20250305-riscv_optimize_entry-v5-4-6507b5dff3ce@rivosinc.com> <87senn3dh1.ffs@tglx> <87jz8y3953.ffs@tglx> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <87jz8y3953.ffs@tglx> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250309_213406_406991_CBB1D5C6 X-CRM114-Status: GOOD ( 15.28 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Sun, Mar 09, 2025 at 09:23:20AM +0100, Thomas Gleixner wrote: > On Sat, Mar 08 2025 at 16:08, Charlie Jenkins wrote: > > On Sat, Mar 08, 2025 at 01:37:30PM +0100, Thomas Gleixner wrote: > >> On Wed, Mar 05 2025 at 16:43, Charlie Jenkins wrote: > >> > Architectures using the generic entry code can be optimized by having > >> > syscall_exit_to_user_mode inlined. > >> > >> That's a pretty handwavy claim. What's the actual benefit in numbers? > > > > I put the numbers in the cover letter! Here is the data I gathered: > > They should be in the change log as the cover letter is not part of what > ends up in git. Yes good point. I will add this data here in the next version of the patch. - Charlie _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv