From patchwork Mon May 16 10:50:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12850573 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC043C433F5 for ; Mon, 16 May 2022 10:51:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 619B36B0072; Mon, 16 May 2022 06:51:17 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5C95B6B0073; Mon, 16 May 2022 06:51:17 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 490CC6B0075; Mon, 16 May 2022 06:51:17 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 3A7C46B0072 for ; Mon, 16 May 2022 06:51:17 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id 0D95F610E6 for ; Mon, 16 May 2022 10:51:17 +0000 (UTC) X-FDA: 79471289394.15.C42EDC0 Received: from mail-pj1-f52.google.com (mail-pj1-f52.google.com [209.85.216.52]) by imf28.hostedemail.com (Postfix) with ESMTP id 4421DC00B7 for ; Mon, 16 May 2022 10:50:52 +0000 (UTC) Received: by mail-pj1-f52.google.com with SMTP id nr2-20020a17090b240200b001df2b1bfc40so4009068pjb.5 for ; Mon, 16 May 2022 03:51:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=5qABwBGQeqRGyH4s8D1h5zI8q8n2HwL4/08QSvpU+KQ=; b=VSDQMlv8C2J9HnzLs/CYYNTmLUOIJa3xmXUvEFaE+GppMb+UfDrfgb9MvmDs2L4DgE fAw8N2GLUo5h45FxctT4TbOBV7xvP5WLkymIZTfaMtTUwmiFhjVIi+IE9N+TRYbne3W/ xUqNzX7bvQkIEWp/4H5F17zPthIGutwTcK3pg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=5qABwBGQeqRGyH4s8D1h5zI8q8n2HwL4/08QSvpU+KQ=; b=6AAhHEUCXHwWpR3JZiDgfjxk45GSeKOqqfr7LOo3mgYBdedD4kbokZYH58SbuL55PD 3AN9UQL9T3nU570V0hjb4ORYt8GrdgOwrH4mHXCFEZmvY49yPVjbcs5Im2rq+dBOWRxn jvpuu2T0kbVjcxPtq3ZhVbK2GlzSog6CnzWOShGZpOjxsJz/eHhESFMjnOupd4UPHB5f LrjLP+ujM8wTg9SieWDKHhn8dwkP981qnEE8gtCiaou/B8Y30CZmHS4L2PY3UTp89eUx na8YVMYOmNLXIOTCLtBiEeCGN/Kuf3KQsd5wJ22UcEKL88QAWpX25EYYVB41owipVCt5 tVuA== X-Gm-Message-State: AOAM533wPgQrZrfrfpSzUSViA1rGsjSjF1AluG7WaiSgByxbayqloPoq QK1GketS6ufw/YpeotSG99aThw== X-Google-Smtp-Source: ABdhPJzEhc6Nq+jLxQgfZOwbXkTmoQiUhXix3nS4TzvMkiag7XSXc+R5p+oyIy22fYfHXoiCxcP8fQ== X-Received: by 2002:a17:90b:33ca:b0:1dc:e5b8:482b with SMTP id lk10-20020a17090b33ca00b001dce5b8482bmr29885251pjb.165.1652698275616; Mon, 16 May 2022 03:51:15 -0700 (PDT) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:cdcb:c865:6f65:d875]) by smtp.gmail.com with ESMTPSA id o14-20020a655bce000000b003db8dd388afsm6332778pgr.10.2022.05.16.03.51.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 03:51:15 -0700 (PDT) From: Hsin-Yi Wang To: Phillip Lougher , Matthew Wilcox , Xiongwei Song Cc: Zheng Liang , Zhang Yi , Hou Tao , Miao Xie , Andrew Morton , "linux-mm @ kvack . org" , "squashfs-devel @ lists . sourceforge . net" , linux-kernel@vger.kernel.org Subject: [PATCH 0/2] Implement readahead for squashfs Date: Mon, 16 May 2022 18:50:59 +0800 Message-Id: <20220516105100.1412740-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.36.0.550.gb090851708-goog MIME-Version: 1.0 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 4421DC00B7 X-Stat-Signature: obqxjnq73kajp54wkbwpzkeu4y4iniy3 Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=VSDQMlv8; dmarc=pass (policy=none) header.from=chromium.org; spf=pass (imf28.hostedemail.com: domain of hsinyi@chromium.org designates 209.85.216.52 as permitted sender) smtp.mailfrom=hsinyi@chromium.org X-Rspam-User: X-HE-Tag: 1652698252-628679 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Commit c1f6925e1091("mm: put readahead pages in cache earlier") requires fs to implement readahead callback. Otherwise there will be a performance regression. Commit 9eec1d897139("squashfs: provide backing_dev_info in order to disable read-ahead") mitigates the performance drop issue for squashfs by closing readahead for it. This series implements readahead callback for squashfs. The previous discussion are in [1] and [2]. [1] https://lore.kernel.org/all/CAJMQK-g9G6KQmH-V=BRGX0swZji9Wxe_2c7ht-MMAapdFy2pXw@mail.gmail.com/T/ [2] https://lore.kernel.org/linux-mm/Yn5Yij9pRPCzDozt@casper.infradead.org/t/#m4af4473b94f98a4996cb11756b633a07e5e059d1 Hsin-Yi Wang (2): Revert "squashfs: provide backing_dev_info in order to disable read-ahead" squashfs: implement readahead fs/squashfs/file.c | 77 +++++++++++++++++++++++++++++++++++++++++++++ fs/squashfs/super.c | 33 ------------------- 2 files changed, 77 insertions(+), 33 deletions(-)