From patchwork Thu Sep 12 16:38:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 13802341 Received: from mail-il1-f177.google.com (mail-il1-f177.google.com [209.85.166.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F0BF1B373C for ; Thu, 12 Sep 2024 16:40:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726159225; cv=none; b=Zr82io8YQF0xLzIWRxb4gX5bVo99W7lAlb4EUTxcNy6HIDf1ob+ypFvjrShwIYwua9hvK3G9OmrwL/ak0AHPEJIWan9UJvzn9uMfCvJcoh6UHZr6mZ/dS4s6vOzC8GIVu5OCDF1ad/UDnxxdlCOi0IOx6wKP8Z5Cl96dUPXM2M8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726159225; c=relaxed/simple; bh=HVJqKUuRa/RAfa0j5OQCERctZfjV2ylV93Ny68zknpQ=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=HvC/Xj60tFa28QErbNBk0uA4liAHK6peTaDhxS8wBZdllSu/+wGs/NgnrdLjPH1UgogPxPtK/X9xmsHxbvvMRi3KtC5ESW5BlSIMbt122qg2wRhQzZQKkSJ0GPwM/vHcK8un+ouKjCGH6xNEIwwzL7a4FXtaSgh5+cxYYlddpQg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=N8GVX2ne; arc=none smtp.client-ip=209.85.166.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="N8GVX2ne" Received: by mail-il1-f177.google.com with SMTP id e9e14a558f8ab-39f526fd19bso225805ab.1 for ; Thu, 12 Sep 2024 09:40:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1726159222; x=1726764022; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date:message-id:reply-to; bh=exLw1yxE+lsrNz+hwdHtp188n6sgWfGl6C2zSWk0328=; b=N8GVX2nefF/cYyF283OfaBfH8tQUMet4BQTfdV88Mt0muWFLjtwy2uFBlqfzwelkCR IhTIdyJJInBxtFn9FQpGPAE6aVQjmJk1vd1zyw4xYngN/UkuEJ/KjbphyoWsH3egZDAZ 0uvUkSOIP3EakolA5w5rBz0OBVhsKjTtcn9v//hVNC1JiyR1vzmqd3rSCrKA9SWEwFn7 OXvlQiT48msq4mTf+L91Hfxyfgd2Vu1GIQML/6GPWnEt2NczCgV0BVCmFRE4BciZXv1T IhPA6j57APaI2B+K3uIcU/ua/e8t45wwcRurkYW4ake4n4TXYntDMKJsRZQIGnnmkL5+ nz5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726159222; x=1726764022; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=exLw1yxE+lsrNz+hwdHtp188n6sgWfGl6C2zSWk0328=; b=IdUCritTol5IIhqdJPoyYM95kPH/RpV7aUXuJkaVk2v1W6yT0XduAiZ9Bbu/ks69ww UHKOxGqrRljKNnpXFzGFCrQ5b1gOJnTi6UF3rfVUmjFoOB/imFA/FcOzZupM5T6PVVG8 6USLPi59W1qlReDjLf8HAQYA3hpEc4cH+q0GRg0VLj35IhND914mkhTrihK1liSdmZm+ CQ99UltqJDX+veEK3ofu69MWgZ1RGZZXIoJafaHIhYjIOGrgprnmFGFWxDbUMQ0mlM5c 3SDM+TFMeulEmUw3F2/fDXZu2JdFAoC+6Ne7SFlicmVC+qcHTF0udm8fcXltl2r1wIPW E+tA== X-Gm-Message-State: AOJu0Yw8Gkcwa43W0FJxj6N7wF8j+tuAKxFcUF2KkQ9ioh5iJuyzFh3G OVBvpS/orAlYbwXbyVgNaG9FkHrfVXPUoWE+j7ksWXh90y4NV2BHuc2P/lIS9aegMWvU9pCzqFi b X-Google-Smtp-Source: AGHT+IHq33x7KG84pqDBSzOAmX3eOtBSw911ZBsMZLvn3fTjG1k4fXTerchhZW3vHH5sVdUPpgcFLQ== X-Received: by 2002:a05:6e02:1d12:b0:3a0:463d:ce1e with SMTP id e9e14a558f8ab-3a0848f8009mr24358645ab.12.1726159222326; Thu, 12 Sep 2024 09:40:22 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-3a05901625esm32564985ab.85.2024.09.12.09.40.21 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Sep 2024 09:40:21 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org Subject: [PATCHSET v3 0/4] Provide more efficient buffer registration Date: Thu, 12 Sep 2024 10:38:19 -0600 Message-ID: <20240912164019.634560-1-axboe@kernel.dk> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi, Pretty much what the subject line says, it's about 25k to 40k times faster to provide a way to duplicate an existing rings buffer registration than it is manually map/pin/register the buffers again with a new ring. Patch 1 is just a prep patch, patch 2 adds refs to struct io_mapped_ubuf, patch 3 abstracts out a helper, and patch 4 finally adds the register opcode to allow a ring to duplicate the registered mappings from one ring to another. This came about from discussing overhead from the varnish cache project for cases with more dynamic ring/thread creation. Also see the buf-copy liburing branch for support and test code: https://git.kernel.dk/cgit/liburing/log/?h=buf-copy include/uapi/linux/io_uring.h | 13 +++++ io_uring/register.c | 60 ++++++++++++++-------- io_uring/register.h | 1 + io_uring/rsrc.c | 96 ++++++++++++++++++++++++++++++++++- io_uring/rsrc.h | 2 + 5 files changed, 150 insertions(+), 22 deletions(-) Since v2: - Ensure that it works for registered rings (both src/dst) - Little cleanups