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([2604:3d08:6979:1160::3424]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2bdd9f2a180sm63810a91.47.2024.05.22.11.07.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 May 2024 11:07:28 -0700 (PDT) Message-ID: Subject: Re: [PATCH bpf-next v2 4/4] selftests: bpf: crypto: adjust bench to use nullable IV From: Eduard Zingerman To: Martin KaFai Lau Cc: bpf@vger.kernel.org, Vadim Fedorenko , Andrii Nakryiko , Alexei Starovoitov , Mykola Lysenko , Jakub Kicinski Date: Wed, 22 May 2024 11:07:27 -0700 In-Reply-To: <73add1b3-b1e4-4d83-85b3-5be45f2658d6@linux.dev> References: <20240510122823.1530682-1-vadfed@meta.com> <20240510122823.1530682-5-vadfed@meta.com> <73add1b3-b1e4-4d83-85b3-5be45f2658d6@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.44.4-0ubuntu2 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2024-05-22 at 11:01 -0700, Martin KaFai Lau wrote: [...] > Inlining it would be nice (as Eduard mentioned in another thread). I also= wonder=20 > if Eduard's work on the no caller saved registers could help the dynptr k= func? I=20 > think the dynptr kfunc optimization could be a followup. For the context: https://clang.llvm.org/docs/AttributeReference.html#no-caller-saved-registe= rs Basically the attribute says that compiler does not need to save all r0-r5 registers for some function calls. My changes for LLVM/verifier are not public yet, I'll try to speedup.