From nobody Fri Dec 19 12:54:57 2025 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 B237F189F3F; Sat, 12 Apr 2025 07:38:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744443534; cv=none; b=Dq3s0ZOxdFqAnlY9wL1TfbXO5cTDIroXZLAWY7VtduarV3r9r2UHyoV8wfLzNBUK4K1H4cwPjvgRu69keXdReW3VUh1Eg1CQ2WEJD8ughFXkLKU8txnF/l/TSCb2ZMfWPxcGF3fyX6o82H6HUUjBR/sW+4oNDCiLSE7iNzC3gHE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744443534; c=relaxed/simple; bh=9pBDPuJef6LzInqFdJRfx1sNwkWKEaOr7fq9l/fN9JM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=tf5JYfemWTYx5VwxfryYuP1cg1ZR75LR+vSKfiaNfdqqHWjR7jiID3pRPSwZDzvOWy88JuMV6Jx5P1rPehFwjGtHYGYR83M3ym/3YvPgWfuUjL5uqt3aYmrZPWvzWZOBAk0lPDKvB2C2TSghp/8XTfp/3ZHwdjv7zpRRDmAOxv0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.93.142]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4ZZQQZ0N27z4f3jtK; Sat, 12 Apr 2025 15:38:30 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 3448D1A0AD9; Sat, 12 Apr 2025 15:38:48 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgCnC2CFGPpnI5n6JA--.63008S5; Sat, 12 Apr 2025 15:38:48 +0800 (CST) From: Yu Kuai To: axboe@kernel.dk, song@kernel.org, yukuai3@huawei.com, xni@redhat.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH 1/4] block: export part_in_flight() Date: Sat, 12 Apr 2025 15:31:59 +0800 Message-Id: <20250412073202.3085138-2-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250412073202.3085138-1-yukuai1@huaweicloud.com> References: <20250412073202.3085138-1-yukuai1@huaweicloud.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 X-CM-TRANSID: gCh0CgCnC2CFGPpnI5n6JA--.63008S5 X-Coremail-Antispam: 1UD129KBjvJXoW7Ar4xKw4kWw43ur48ur4Uurg_yoW8AFy7pF 1DGas0yFWqgryruFy7tw4xZ3WrXa1jkw1fA343AryF9FZFqrsavF92kr4ayrWSvrZ7ZFWU ua43JFZ7Cr1jy3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmj14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r1I6r4UM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UM2 8EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AI xVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20x vE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xv r2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2IY04 v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j 6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7 AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE 2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcV C2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2Kfnx nUUI43ZEXa7VUbn2-7UUUUU== X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: Yu Kuai This helper will be used in mdraid in later patches, check if there are normal IO inflight while generating background sync IO, to fix a problem in mdraid that foreground IO can be starved by background sync IO. Signed-off-by: Yu Kuai --- block/blk.h | 1 - block/genhd.c | 1 + include/linux/part_stat.h | 1 + 3 files changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk.h b/block/blk.h index 006e3be433d2..f476f233f195 100644 --- a/block/blk.h +++ b/block/blk.h @@ -418,7 +418,6 @@ void blk_apply_bdi_limits(struct backing_dev_info *bdi, int blk_dev_init(void); =20 void update_io_ticks(struct block_device *part, unsigned long now, bool en= d); -unsigned int part_in_flight(struct block_device *part); =20 static inline void req_set_nomerge(struct request_queue *q, struct request= *req) { diff --git a/block/genhd.c b/block/genhd.c index c2bd86cd09de..5b408d9b5a9d 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -139,6 +139,7 @@ unsigned int part_in_flight(struct block_device *part) =20 return inflight; } +EXPORT_SYMBOL_GPL(part_in_flight); =20 static void part_in_flight_rw(struct block_device *part, unsigned int inflight[2]) diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h index c5e9cac0575e..79ed730a8d50 100644 --- a/include/linux/part_stat.h +++ b/include/linux/part_stat.h @@ -79,4 +79,5 @@ static inline void part_stat_set_all(struct block_device = *part, int value) #define part_stat_local_read_cpu(part, field, cpu) \ local_read(&(part_stat_get_cpu(part, field, cpu))) =20 +unsigned int part_in_flight(struct block_device *part); #endif /* _LINUX_PART_STAT_H */ --=20 2.39.2