From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (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 38ABF146596 for ; Wed, 7 Aug 2024 21:59:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723067956; cv=none; b=esZ+cYYisfwx4xZyP2w8yEFaD5C4ThQvAwRPPm7JVbE4HQ9NtvChptiuFf7Dj3tTdACwWBcr1EMcfgyfGpIS/SW2vmgSeJVyLfbDjA1SbORI+uNyhBLK9SexHzTvXzA0VIA4xEHlUpOUuen22q/qHSlf/2qVLqwedARES/gd1GA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723067956; c=relaxed/simple; bh=LXFTv0BK9Iffajc2/i1PtjtI69HQGOGoDpwrOPWu0vM=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=UcYaIfXpgbGHkAzciESOW6apJVgiKSV05hQd0ALPL4+Tb/5576HI5rO00E06OvYGbxmwYtr6zOxwuRfyIjuIAGfHwqtexuOEQenY89lMjkYCbODSHaAGihfB9fiyRUb1Wd1gKa3jaInwko5XKciyKUx2pa2W6uXEKU9r6K3ss8Y= 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=GOo8tj1A; arc=none smtp.client-ip=209.85.210.182 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="GOo8tj1A" Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-70d2d7e692eso336340b3a.0 for ; Wed, 07 Aug 2024 14:59:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1723067954; x=1723672754; 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=AxDzmKdqcUtJZTcycGOXStgdnD7iuQY3wxJVwQ+aWpw=; b=GOo8tj1A17kuHxnVV1Zg0g1uJ7B1+UFdGB9rqjSRT0gPra+MFKTnfB5STPN7pFdxWU +PzhAtdv6iLuoJ1I75o4e7ZqHHcTRuz0meayCbyfpKhm9dI2XPNOL4s4/SRhF9pr9jhF XHC14lBIDLbwLu7w250B0ZKXCfnsTRW8s2O2s9TVAJJEuuf3eWKju225ONJ1sp4iwIh7 2R09EYD8G8p899RcYjyS0SnKkLW75ZklP+Wa5XGniy6BpiB6fRuGBbEYWyCvu7w/ppjh mg4hVin0I2CwH8mmx8K94mXSe2TOUJAHY0EqgSw7h42DWu17/uIqzeTtXiFCpqkJ8oQ5 Ngmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723067954; x=1723672754; 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=AxDzmKdqcUtJZTcycGOXStgdnD7iuQY3wxJVwQ+aWpw=; b=NMq5nCBG52ddx0Ei2wILwVT2R1TBlPTf8LPXEKe6Bl6yxWR9edpwd1YpsHKoFdMZIG 5NP6+8w9LFODHrK27suu05O0zYvHTB/rdqDCERtce/mjL7IXGZXZ6+V4MC3RJnyXyn9G F/DO6xG/5tHZ9Zlb217xwXaa73pL//VrwqApcxWTl0b1HkfFqY92bhKIDEVVdu1/Voai ROTN8KO0pkBIsn9oAkxfMTXTqAby/jSvHLnGaEhut/j8Kb47NE2Yq85R4kAjZIJp4SeJ muhfaA7V6u3k9XG20/xKja9iv74tQmMgb4OaU1+vrnyrp56JWBnxcWeVeyngY5Btja2l ODkg== X-Forwarded-Encrypted: i=1; AJvYcCUkc/TLgjC7JIof7EbXzLCuCCecYcRBu4LYE6Umfv2U2J+t5MPenAQEWVQuFmBXvUtYgQgaNlCL/srBE8DVYxpODh8u6JMrsJo2S1Yn X-Gm-Message-State: AOJu0YwDgL/7N0vxGlshBpZ1lBU5gvDH8ji6MZ7TJbu8eGuW+ojRoa2K KG234G7saqnuoI/eQq7/hDoW55LtmOn27BkBUITx0AI79NoLNR9u X-Google-Smtp-Source: AGHT+IFYGqVS/K51ggCR3u26GIQcG9UZvTeioqf0950X98wqlmAMKhuS+DQUIzv6+k8/rjlQITQSlQ== X-Received: by 2002:a05:6a00:2e1b:b0:70e:9213:f321 with SMTP id d2e1a72fcca58-710cada71f7mr44542b3a.14.1723067954434; Wed, 07 Aug 2024 14:59:14 -0700 (PDT) Received: from barry-desktop.hub ([2407:7000:8942:5500:aaa1:59ff:fe57:eb97]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7106ed2d544sm8842695b3a.187.2024.08.07.14.59.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Aug 2024 14:59:14 -0700 (PDT) From: Barry Song <21cnbao@gmail.com> To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: chrisl@kernel.org, david@redhat.com, hughd@google.com, justinjiang@vivo.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 v3 0/2] mm: batch free swaps for zap_pte_range() Date: Thu, 8 Aug 2024 09:58:57 +1200 Message-Id: <20240807215859.57491-1-21cnbao@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. -v3: * collect David's acked-by for patch1/2 * further refine the code per David; * fix a corner case which might leak swap slots, thanks for Kairui's comment. -v2: https://lore.kernel.org/all/20240807082508.358322-1-21cnbao@gmail.com/ * 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 | 410 ++++++++++++++++++++++++++++---------------------- 1 file changed, 232 insertions(+), 178 deletions(-) -- 2.34.1