From nobody Thu Nov 28 02:45:31 2024 Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0BE1B7CF16 for ; Sun, 6 Oct 2024 14:53:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728226383; cv=none; b=UXiqH4CML8tYnaemoFlh6c4DVauS07UhkoTNsz1JMJrOXSwZz3wlpUgAOArVpP3+21OGTTsJKFvgIbsiqipGyqI2f+mPRzX6TgllR4J7RDSdtmfaqGGUUKjbvalAIyC4Bc4EJJ2aX8cJiJ8fRAC12lVqdBUiGScRoEJuoK1ZsAQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728226383; c=relaxed/simple; bh=aUA1bM8P1Ew8vQnt7B9NnQGncWdEinSrEJ/F9sbP0Yw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=l0WOOO41IDm+VqXsMcjFIc0jRNVOSRKiky94rutmyLK0AZpPfves3bo0SZ2xMzWwKCUnuT8sCSnYFkYEMPm0k37JpbD+HDkiZlUTznYCB2jLbiNxBQoenOmg1ZfhENTCsIUFU0rlJcCOSZUxbYl43gJkwt1boDzhf+4Y2wP5VHA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=shopee.com; spf=pass smtp.mailfrom=shopee.com; dkim=pass (2048-bit key) header.d=shopee.com header.i=@shopee.com header.b=UqcEU7c8; arc=none smtp.client-ip=209.85.215.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=shopee.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=shopee.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=shopee.com header.i=@shopee.com header.b="UqcEU7c8" Received: by mail-pg1-f177.google.com with SMTP id 41be03b00d2f7-7ea0728475dso177840a12.0 for ; Sun, 06 Oct 2024 07:53:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shopee.com; s=shopee.com; t=1728226380; x=1728831180; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2N3sStJpxaR2HR+abJXgKtrpDLoMQudskN/sLQC1NOU=; b=UqcEU7c8PNl2etyuIiEZvkWioZe2OicNj67J8AhtdKEgQqqysFRaezha7Iw06uT/pY OdTZCwGNB5PvzuS9cCTAwlsZBqYlymlYdZto4Tmc5yoyQvsGF6bVe9QpOjXCiF+hvMgR E+VCn5MRKxrRIDmGVSy6NRt33iE8wcnlfxcybIEi3050FsoYXdvDPZp8+4Tkv7HSkw69 w/1gi7Lm4ACq8+9/h4SbaEsit8iNPfORdxoe9byfx7Qk2eFaX+q9d6ht1tuH84TN9eIe h2N9qNYyWwEVkaTsH0rr9W3stO+xP4x/toCHznr5izoX0i1wGNPHvbO5ULO89cDr7qgu fMoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728226380; x=1728831180; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2N3sStJpxaR2HR+abJXgKtrpDLoMQudskN/sLQC1NOU=; b=sy4KCrunEDQQ9jf+cEJJOOj++DauGkknNrbDR/PerXjMdMVg+w4OrHd9mnzcscG2uD TNV+CduUiE8cT9VG2uT1IhcC7rOW2Gg8jcNtjijM50AVTvAvwgYD2jkNgcVY/QhZQV8q IveN+BIni8qtTMUGpBAm8ABV7QdqCl5Os9vZxZOM9w4mJ45TUjuyJKrjRnLLPvlPe9G6 pT45EbRBW5yWPW10G9+ZUKTocJkv9nXnsTYe1i0XOg8GvT0QWm/Yj9MP5qMgyrq4rLhV 3Qj++O24Y1lEMUnsRZA88q0xoQqaIhuE2mJ4KiYbmvwBJOTK2zRO2q8mW3SUUQQGL3tK /tsA== X-Gm-Message-State: AOJu0YxZBi8LVCjuAjO8IxEQMdTP/9yT7zq4Sff3l5dwnZzF8Ytuu9qY 6QlUo4AljOJLVcD9chCrjQLPBk0Unw3krpTXdgUAIHkHKN9bqpct36KVUjhQeEc= X-Google-Smtp-Source: AGHT+IHG4IQr7deYQUJRIYz9fhcCuV66BnPCOFrXxZCcjoVgw9zfF27tSDdPFaL2+eQyuT6EmIQ+7w== X-Received: by 2002:a17:90a:fb8b:b0:2e0:7580:6853 with SMTP id 98e67ed59e1d1-2e1e5dba9e2mr12443142a91.17.1728226380265; Sun, 06 Oct 2024 07:53:00 -0700 (PDT) Received: from localhost.localdomain ([143.92.64.17]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e1e8664bfasm5213680a91.44.2024.10.06.07.52.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Oct 2024 07:52:59 -0700 (PDT) From: Tang Yizhou X-Google-Original-From: Tang Yizhou To: jack@suse.cz, hch@infradead.org, willy@infradead.org, akpm@linux-foundation.org, chandan.babu@oracle.com Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, Tang Yizhou Subject: [PATCH v2 1/3] mm/page-writeback.c: Rename BANDWIDTH_INTERVAL to BW_DIRTYLIMIT_INTERVAL Date: Sun, 6 Oct 2024 23:28:47 +0800 Message-Id: <20241006152849.247152-2-yizhou.tang@shopee.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241006152849.247152-1-yizhou.tang@shopee.com> References: <20241006152849.247152-1-yizhou.tang@shopee.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tang Yizhou The name of the BANDWIDTH_INTERVAL macro is misleading, as it is not only used in the bandwidth update functions wb_update_bandwidth() and __wb_update_bandwidth(), but also in the dirty limit update function domain_update_dirty_limit(). Rename BANDWIDTH_INTERVAL to BW_DIRTYLIMIT_INTERVAL to make things clear. This patche doesn't introduce any behavioral changes. v2: Rename UPDATE_INTERVAL to BW_DIRTYLIMIT_INTERVAL. Signed-off-by: Tang Yizhou --- mm/page-writeback.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index fcd4c1439cb9..3af7bc078dc0 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -54,9 +54,9 @@ #define DIRTY_POLL_THRESH (128 >> (PAGE_SHIFT - 10)) =20 /* - * Estimate write bandwidth at 200ms intervals. + * Estimate write bandwidth or update dirty limit at 200ms intervals. */ -#define BANDWIDTH_INTERVAL max(HZ/5, 1) +#define BW_DIRTYLIMIT_INTERVAL max(HZ/5, 1) =20 #define RATELIMIT_CALC_SHIFT 10 =20 @@ -1331,11 +1331,11 @@ static void domain_update_dirty_limit(struct dirty_= throttle_control *dtc, /* * check locklessly first to optimize away locking for the most time */ - if (time_before(now, dom->dirty_limit_tstamp + BANDWIDTH_INTERVAL)) + if (time_before(now, dom->dirty_limit_tstamp + BW_DIRTYLIMIT_INTERVAL)) return; =20 spin_lock(&dom->lock); - if (time_after_eq(now, dom->dirty_limit_tstamp + BANDWIDTH_INTERVAL)) { + if (time_after_eq(now, dom->dirty_limit_tstamp + BW_DIRTYLIMIT_INTERVAL))= { update_dirty_limit(dtc); dom->dirty_limit_tstamp =3D now; } @@ -1928,7 +1928,7 @@ static int balance_dirty_pages(struct bdi_writeback *= wb, wb->dirty_exceeded =3D gdtc->dirty_exceeded || (mdtc && mdtc->dirty_exceeded); if (time_is_before_jiffies(READ_ONCE(wb->bw_time_stamp) + - BANDWIDTH_INTERVAL)) + BW_DIRTYLIMIT_INTERVAL)) __wb_update_bandwidth(gdtc, mdtc, true); =20 /* throttle according to the chosen dtc */ @@ -2705,7 +2705,7 @@ int do_writepages(struct address_space *mapping, stru= ct writeback_control *wbc) * writeback bandwidth is updated once in a while. */ if (time_is_before_jiffies(READ_ONCE(wb->bw_time_stamp) + - BANDWIDTH_INTERVAL)) + BW_DIRTYLIMIT_INTERVAL)) wb_update_bandwidth(wb); return ret; } @@ -3057,14 +3057,14 @@ static void wb_inode_writeback_end(struct bdi_write= back *wb) atomic_dec(&wb->writeback_inodes); /* * Make sure estimate of writeback throughput gets updated after - * writeback completed. We delay the update by BANDWIDTH_INTERVAL + * writeback completed. We delay the update by BW_DIRTYLIMIT_INTERVAL * (which is the interval other bandwidth updates use for batching) so * that if multiple inodes end writeback at a similar time, they get * batched into one bandwidth update. */ spin_lock_irqsave(&wb->work_lock, flags); if (test_bit(WB_registered, &wb->state)) - queue_delayed_work(bdi_wq, &wb->bw_dwork, BANDWIDTH_INTERVAL); + queue_delayed_work(bdi_wq, &wb->bw_dwork, BW_DIRTYLIMIT_INTERVAL); spin_unlock_irqrestore(&wb->work_lock, flags); } =20 --=20 2.25.1