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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8550C4321E for ; Thu, 1 Dec 2022 00:09:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230431AbiLAAJz (ORCPT ); Wed, 30 Nov 2022 19:09:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230012AbiLAAIK (ORCPT ); Wed, 30 Nov 2022 19:08:10 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 403B82C64F for ; Wed, 30 Nov 2022 16:02:55 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9E3186176C for ; Thu, 1 Dec 2022 00:02:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC333C43470; Thu, 1 Dec 2022 00:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1669852974; bh=nuyjF7/IFwE8yZqZs8sjNUFZI2pPF+avtRRjpCKKx4M=; h=Date:To:From:Subject:From; b=mRTt1T4pK31anKyVYNabqFnIrp5/MnwBLFTvkVPfLvH+U5PJzs7HfvWk5q4cxlYD4 nUjuOpgzNQoYsHsFIPOtFypT7ZEJmW+TTPUwdAK3Lk267mYxTs8bTcfxP4uce5EQxW UajxriW1hGZhQpjU5163yfFXvGySDyHKtHYuy8Do= Date: Wed, 30 Nov 2022 16:02:53 -0800 To: mm-commits@vger.kernel.org, clm@meta.com, axboe@kernel.dk, shr@devkernel.io, akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-add-knob-sys-class-bdi-bdi-max_bytes.patch removed from -mm tree Message-Id: <20221201000253.DC333C43470@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The quilt patch titled Subject: mm: add knob /sys/class/bdi//max_bytes has been removed from the -mm tree. Its filename was mm-add-knob-sys-class-bdi-bdi-max_bytes.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Stefan Roesch Subject: mm: add knob /sys/class/bdi//max_bytes Date: Fri, 18 Nov 2022 16:52:03 -0800 This adds the new knob max_bytes to specify a dirty memory limit for the corresponding bdi. The specified bytes value is converted to a ratio. Link: https://lkml.kernel.org/r/20221119005215.3052436-9-shr@devkernel.io Signed-off-by: Stefan Roesch Cc: Chris Mason Cc: Jens Axboe Signed-off-by: Andrew Morton --- mm/backing-dev.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) --- a/mm/backing-dev.c~mm-add-knob-sys-class-bdi-bdi-max_bytes +++ a/mm/backing-dev.c @@ -199,6 +199,34 @@ static ssize_t max_ratio_store(struct de } BDI_SHOW(max_ratio, bdi->max_ratio / BDI_RATIO_SCALE) +static ssize_t max_bytes_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct backing_dev_info *bdi = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%llu\n", bdi_get_max_bytes(bdi)); +} + +static ssize_t max_bytes_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct backing_dev_info *bdi = dev_get_drvdata(dev); + u64 bytes; + ssize_t ret; + + ret = kstrtoull(buf, 10, &bytes); + if (ret < 0) + return ret; + + ret = bdi_set_max_bytes(bdi, bytes); + if (!ret) + ret = count; + + return ret; +} +DEVICE_ATTR_RW(max_bytes); + static ssize_t stable_pages_required_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -241,6 +269,7 @@ static struct attribute *bdi_dev_attrs[] &dev_attr_read_ahead_kb.attr, &dev_attr_min_ratio.attr, &dev_attr_max_ratio.attr, + &dev_attr_max_bytes.attr, &dev_attr_stable_pages_required.attr, &dev_attr_strict_limit.attr, NULL, _ Patches currently in -mm which might be from shr@devkernel.io are