From nobody Fri Dec 19 19:15:50 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E1D913A89C; Wed, 13 Mar 2024 16:42:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348164; cv=none; b=RFHSlvmYRuARkWUOIzy7ZW0vkSHvr90MnRmUxR63LRpXdRAxIUioVBOPnPHTJ/8qsBDRvQXz5P3f/Rxxa2E/wDMaVUvzaa/99bIx05IRzl+SXDYJ57QfKdTb3nPB0JSiFO1DbySLbb+X7IdvzDpm7L+lHawbD2D0ASR0vVsANQU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710348164; c=relaxed/simple; bh=/PQF0yX/ENGcXAUA1kKDscSZKucRJsSGt8v8NkP/bHE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YHWl7ki8xft168CGkkZJCcwcCyct7P1GzArtsF+DQ/zaen+cT0Hlfp9UXAXGhK6qiWNn9bLoGfE2QUnMcznctlNb1jEa1mULN9kQ5keIkopLtPZ08YoB5AZavUTg7p1CTWesiCaTv/E4aY+jqD3I6gN8Ginl0q8jUW8j5W4J3oo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=flo1eiRL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="flo1eiRL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2BDA5C433F1; Wed, 13 Mar 2024 16:42:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710348164; bh=/PQF0yX/ENGcXAUA1kKDscSZKucRJsSGt8v8NkP/bHE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=flo1eiRLsyoVLnrKIErZZC9bQS++9UqX08CRX2pi7eQgAcOmx7RN4/YRhy0TWx423 OuAzJf7Umf1gwPJBapv/Ih0YDbj8TjcrksWllDJTIFUC14BJM9x8NmJPwDufRFYQ+C hy1o8s5D6tkCuIpICgh8VKLDf4wFHzUYtHINjrC8lzigvT/5/xrcxPGxxXSwIW4Sxc UUegtwg4kk2gFldVQZbIzsB9e7ZubT6RKWnEOO8bqHFCOMaVLPV2wsew2cUTa7UTKM DTM4RvguIItC0ahbWVHcoZCVsel0Rw/+QXofrL4hTO+0mycKJjimh29ALWc1URyUUl 7Q7oVAiiksQ/w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Gao Xiang , Jingbo Xu , Chao Yu , Sasha Levin Subject: [PATCH 5.15 15/76] erofs: apply proper VMA alignment for memory mapped files on THP Date: Wed, 13 Mar 2024 12:41:22 -0400 Message-ID: <20240313164223.615640-16-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240313164223.615640-1-sashal@kernel.org> References: <20240313164223.615640-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.152-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.15.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.15.152-rc1 X-KernelTest-Deadline: 2024-03-15T16:42+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Gao Xiang [ Upstream commit 4127caee89612a84adedd78c9453089138cd5afe ] There are mainly two reasons that thp_get_unmapped_area() should be used for EROFS as other filesystems: - It's needed to enable PMD mappings as a FSDAX filesystem, see commit 74d2fad1334d ("thp, dax: add thp_get_unmapped_area for pmd mappings"); - It's useful together with large folios and CONFIG_READ_ONLY_THP_FOR_FS which enable THPs for mmapped files (e.g. shared libraries) even without FSDAX. See commit 1854bc6e2420 ("mm/readahead: Align file mappings for non-DAX"). Fixes: 06252e9ce05b ("erofs: dax support for non-tailpacking regular file") Fixes: ce529cc25b18 ("erofs: enable large folios for iomap mode") Fixes: e6687b89225e ("erofs: enable large folios for fscache mode") Reviewed-by: Jingbo Xu Reviewed-by: Chao Yu Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20240306053138.2240206-1-hsiangkao@linux.al= ibaba.com Signed-off-by: Sasha Levin --- fs/erofs/data.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/erofs/data.c b/fs/erofs/data.c index 16a41d0db55a3..a859bf0f31df2 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -340,4 +340,5 @@ const struct file_operations erofs_file_fops =3D { .read_iter =3D erofs_file_read_iter, .mmap =3D erofs_file_mmap, .splice_read =3D generic_file_splice_read, + .get_unmapped_area =3D thp_get_unmapped_area, }; --=20 2.43.0