From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (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 4CE131C9DC6 for ; Wed, 7 Aug 2024 08:25:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723019130; cv=none; b=lcGs9LLGExjKbQvoQEfDwlftPLBH6Y8LQm0D3aIuMKj3mWDuhWNVFM9ZSfU/xYiNaP2s6PYMh26bgVcp/emwzl7bpje1QQ7nwHPkquYMMt6eRiTRihXaQX4XO8dg1cUHKQ3i2SG0QMgQzi2cRZ+bCae88EFmJjEkPSQ0MXcY1Rw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723019130; c=relaxed/simple; bh=05rUOREPT47y98cAfRIgwPdy4oZntK7C49vCDSpn17Q=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=HIF9fcYuZQxQFbu+fIXKRS7wy2fMuJ/dh60Pq5PybFLSl9gpUHGQQSgoZ7oPiZZrgqUGto0QZIMGd7Hc2PcGcQzIx3CsKtU8HB0+/2jczsHRAIZgR6i0ryE1Q1QSIrao5M+D/AtqTGe5rSicDuQXF2ZZHse9qUprbbjNy8pdoF8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=gjYdWq7/; arc=none smtp.client-ip=209.85.210.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gjYdWq7/" Received: by mail-pf1-f176.google.com with SMTP id d2e1a72fcca58-70d1fb6c108so1197113b3a.3 for ; Wed, 07 Aug 2024 01:25:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1723019129; x=1723623929; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=k3iK8ZSwBrGI3RfSrcme7sg3QHtVebDulO9FtrVvWj8=; b=gjYdWq7/4bd7VfCIl7crzVMAMrgckVKNO/zw4YBSuDZoja75b9hxJ4FPJVxrRgalbb FU1EnOxkhnMIcjOEtD08T3VQBQzxE3oJDYeOERfPIQiNtALJdemtLZqBPIVlOq0J8mqq NXq7508ZUO+/m/GbAHkCjWCnyCMkQTBbXsD8lUSkppMyRS+0x4gEyIY9ITWQvv5impJn +n2lcpuxBGn/Amq2xfKIHHxlR2MAk+rkQE4C9vCCJsiEMAs7l4WQgvVXwewn+zLoowfP T7dEqGl4C36NdF1GxeUReB5KHN6VNYzWp5ldL/eX3+9gzr8OQSOJebjF0oQUZXSmafdj TqVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723019129; x=1723623929; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=k3iK8ZSwBrGI3RfSrcme7sg3QHtVebDulO9FtrVvWj8=; b=jWuhvjYHGL5Cwd/53eCkzhfBO49yvbQFXkUZkEUl6i7bpE5HPNtw9UrUqJiFLpCeWX x9EQy18aEK69V6iNgoRiNEZvaBLWEFLYKmHuLILVtqXbA6XC9yrfVk2J1206IZ5qtdmS IEv9bMpxoUWeXgSRUKkpSTPk58HHWSOPIl2wMeUHt1aHfXCLsVSzvKCfUci6K7D7iSW+ q48BpkB3GbfBW4D9CQ8z1xqPGonBqAifwiiVE9tREKTAzJ1vHmMv5BTE6wzogNlBkOfJ vmS0kMkJzFSBv59wd5+q1hnJ+QQhyxyG8VXoWMmGNleYAfiXFQubYIYQBAvyoGefswT1 lAGA== X-Forwarded-Encrypted: i=1; AJvYcCXZdGXNRYXxgu8ACwkAvPyERcCdiuVYDhfBiheUff/ySjrav23wCXFYY5UjzI4W8qtFmg6CBmbARYe3oarHMUZjFsu5QWAcY3OUrZ7y X-Gm-Message-State: AOJu0YyIYyFaVBt+vkf44MHCEhU3BNVyXqCr9DsMK6BwBwYi72XrB8kV PNXEg4gZWlsxaBqpeIBh/Ave0+WmYJBGMKLX006A09ZP1rde1ROO X-Google-Smtp-Source: AGHT+IEPWCoSdIhYPn+ZYc/O4dnNZ3F7X1EL07HeW2rmg/mPGQisz+refjeCJtWvk2J1FNC4oqbbJw== X-Received: by 2002:a05:6a20:4393:b0:1c4:9ef6:499b with SMTP id adf61e73a8af0-1c6995a01b7mr16907669637.29.1723019128594; Wed, 07 Aug 2024 01:25:28 -0700 (PDT) Received: from barry-desktop.hub ([2407:7000:8942:5500:aaa1:59ff:fe57:eb97]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7106ed0d457sm7911763b3a.156.2024.08.07.01.25.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Aug 2024 01:25:28 -0700 (PDT) From: Barry Song <21cnbao@gmail.com> To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: justinjiang@vivo.com, chrisl@kernel.org, david@redhat.com, hughd@google.com, kaleshsingh@google.com, kasong@tencent.com, linux-kernel@vger.kernel.org, ryan.roberts@arm.com, v-songbaohua@oppo.com, ying.huang@intel.com Subject: [PATCH v2 0/2] mm: batch free swaps for zap_pte_range() Date: Wed, 7 Aug 2024 20:25:06 +1200 Message-Id: <20240807082508.358322-1-21cnbao@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Barry Song Batch free swap slots for zap_pte_range(), making munmap three times faster when the page table entries are filled with swap entries to be freed. This is likely another advantage of using mTHP. -v2: * cleanup the name of the instances of swap_info_struct, per Andrew, David; * refine the code to add fallback in the batch free function, Thanks for David's suggestion. -v1: https://lore.kernel.org/all/20240806012409.61962-1-21cnbao@gmail.com/ Barry Song (2): mm: rename instances of swap_info_struct to meaningful 'si' mm: attempt to batch free swap entries for zap_pte_range() mm/swapfile.c | 412 ++++++++++++++++++++++++++++---------------------- 1 file changed, 234 insertions(+), 178 deletions(-) -- 2.34.1