From mboxrd@z Thu Jan 1 00:00:00 1970 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 8BAE8C433EF for ; Mon, 16 May 2022 10:42:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 031198D0006; Mon, 16 May 2022 06:42:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F21A58D0003; Mon, 16 May 2022 06:42:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E107D8D0006; Mon, 16 May 2022 06:42:53 -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 D2DCE8D0003 for ; Mon, 16 May 2022 06:42:53 -0400 (EDT) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay13.hostedemail.com (Postfix) with ESMTP id AFB2A6121A for ; Mon, 16 May 2022 10:42:53 +0000 (UTC) X-FDA: 79471268226.05.61710BA Received: from mail-pg1-f171.google.com (mail-pg1-f171.google.com [209.85.215.171]) by imf20.hostedemail.com (Postfix) with ESMTP id D19C71C00CC for ; Mon, 16 May 2022 10:42:41 +0000 (UTC) Received: by mail-pg1-f171.google.com with SMTP id 31so13701492pgp.8 for ; Mon, 16 May 2022 03:42:52 -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=gGywS9bHxk5TZLlg9cekFTB0weMYTqUUeiNtr9tZHho=; b=aF8Vk35o5gqPuerIPs6Aw+pBQ/K6j6dF1s+VEzN+mv48EULn6pi4887t2cp7eG1SuV Cg5So539af0OUXOeoR0S8BqNWeEEh72naBPz0RlsSudJ5mqA5Q4b1SZJ1Sm7pyluQGG2 Rt3Fr0G55MrmNV1QJwj3LwOPs5TGPB+XMwDJQ= 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=gGywS9bHxk5TZLlg9cekFTB0weMYTqUUeiNtr9tZHho=; b=hQU2dXCk8Jli6Tod8qRTopLR5B9daW9RcL56do14SVgqBPTwbVZ2w0XHn+9iJD4Ehn obY4epV9cIcnqNf8FHZDtG/Ac+7bfyz5LtmNAGdZF5dC/HpaqMPni0pUMI5qPS6GX2gC zryf5g54svnCeJlKcRFM+aocZy6w1XJYBGSjbvvKEblVIpYKEcYp5dqfCqdqln6/kfL2 TJHIhxyZnj7zRSY7uhQODQgxxWym5ScBtyTReKt99dOQjHj9GjKNB9q8z5jCK3XKiXY7 2Bk9FAyGmmznD17ftmEbW1ab3v4wlJUhq9W7ndK83gTojbekFprofNy1+8xQjVT0YiZE berQ== X-Gm-Message-State: AOAM531IUfmCB/YF4Tg04DeE1iYjbga1Al/lyp5fOJYwvX1icXQdbGa1 tZiE33EwEEe2FPMlCINN3RgaDg== X-Google-Smtp-Source: ABdhPJyncUK3MZU/GJsE8dgsnjOCQKmWoiGt3yIx9nl/FcnEK7brtYhcPM7Q3kN1VggUz9jh08uisg== X-Received: by 2002:a62:6410:0:b0:4f3:9654:266d with SMTP id y16-20020a626410000000b004f39654266dmr16640705pfb.59.1652697772064; Mon, 16 May 2022 03:42:52 -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 10-20020a17090a01ca00b001cd4989ff70sm6191232pjd.55.2022.05.16.03.42.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 03:42:51 -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 0/3] Implement readahead for squashfs Date: Mon, 16 May 2022 18:42:08 +0800 Message-Id: <20220516104209.1407388-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.36.0.550.gb090851708-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: D19C71C00CC X-Stat-Signature: ibzxgx4ow5wrocws91e71qbnnehdaahe X-Rspam-User: Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=aF8Vk35o; spf=pass (imf20.hostedemail.com: domain of hsinyi@chromium.org designates 209.85.215.171 as permitted sender) smtp.mailfrom=hsinyi@chromium.org; dmarc=pass (policy=none) header.from=chromium.org X-HE-Tag: 1652697761-495598 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 (3): Revert "squashfs: Convert squashfs to read_folio" Revert "squashfs: provide backing_dev_info in order to disable read-ahead" squashfs: implement readahead fs/squashfs/file.c | 82 +++++++++++++++++++++++++++++++++++++++++-- fs/squashfs/super.c | 33 ----------------- fs/squashfs/symlink.c | 5 ++- 3 files changed, 81 insertions(+), 39 deletions(-) -- 2.36.0.550.gb090851708-goog