From mboxrd@z Thu Jan 1 00:00:00 1970 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 6D4748474 for ; Tue, 28 Mar 2023 14:45:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E616FC433D2; Tue, 28 Mar 2023 14:45:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680014719; bh=zfPODjKtu3HdiMjTnIcccTGnyDmY7ImOHYYbBZV6DX0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bk/vbgeEmiLqHTLGDqKW50g3fFsvFhdx9rc7x0wE6JFGehYY1t8XuKosXH+aciCQ4 Y9KhkXWLGHSm87y1DIYR0igxVtknbx8p0vFdfSP+b7fK4AY7N5uXgpfYRjyerLa42q SwAe4r3NTverApFcUKgZavKNv8ZtR8vl/9GFwASw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dave Wysochanski , Anna Schumaker , Sasha Levin Subject: [PATCH 6.2 027/240] NFS: Fix /proc/PID/io read_bytes for buffered reads Date: Tue, 28 Mar 2023 16:39:50 +0200 Message-Id: <20230328142620.768626003@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230328142619.643313678@linuxfoundation.org> References: <20230328142619.643313678@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Dave Wysochanski [ Upstream commit 9c88ea00fef03031ce6554531e89be82f6a42835 ] Prior to commit 8786fde8421c ("Convert NFS from readpages to readahead"), nfs_readpages() used the old mm interface read_cache_pages() which called task_io_account_read() for each NFS page read. After this commit, nfs_readpages() is converted to nfs_readahead(), which now uses the new mm interface readahead_page(). The new interface requires callers to call task_io_account_read() themselves. In addition, to nfs_readahead() task_io_account_read() should also be called from nfs_read_folio(). Fixes: 8786fde8421c ("Convert NFS from readpages to readahead") Link: https://lore.kernel.org/linux-nfs/CAPt2mGNEYUk5u8V4abe=5MM5msZqmvzCVrtCP4Qw1n=gCHCnww@mail.gmail.com/ Signed-off-by: Dave Wysochanski Signed-off-by: Anna Schumaker Signed-off-by: Sasha Levin --- fs/nfs/read.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 8ae2c8d1219d8..cd970ce62786b 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -338,6 +339,7 @@ int nfs_read_folio(struct file *file, struct folio *folio) trace_nfs_aop_readpage(inode, page); nfs_inc_stats(inode, NFSIOS_VFSREADPAGE); + task_io_account_read(folio_size(folio)); /* * Try to flush any pending writes to the file.. @@ -400,6 +402,7 @@ void nfs_readahead(struct readahead_control *ractl) trace_nfs_aop_readahead(inode, readahead_pos(ractl), nr_pages); nfs_inc_stats(inode, NFSIOS_VFSREADPAGES); + task_io_account_read(readahead_length(ractl)); ret = -ESTALE; if (NFS_STALE(inode)) -- 2.39.2