From nobody Sun Oct 5 18:19:57 2025 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (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 C13EE5680; Fri, 1 Aug 2025 07:30:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754033456; cv=none; b=WrnbecsSo3Dzp8eq9HOD37qwGaCoui+Zw70PLdRPYaOq1nH36nO0JGGUaiEPpgS8ZlP+i1TBSuqAoBJDMlZHlmUM0Ufj4AzO+WSgw+chtK1jhtuITQpmcm51jQ6zQseQyBp6RMfIzQOsYQSc0f5st8OHFvvo4AKW/T9PBCtH3jQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754033456; c=relaxed/simple; bh=IL7vwowfQbXIhcPRO/W/mp0w3l+kTSoIGbJmqv+2ugA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=msu18wqHgzwQ5roSjpsFfa0bwDB90UWQOMT33JmFdcOtpTKVaQOYGpW5olQIZz1260hYKD1aVBXPz64jkT/Gjp5X3jKyRzgCfx2Y83qVAE3uGMak5vJ3TaqwZCBrJFzObdF6RxYv5j/opH2qbK139DL+CjRktVrkpA3eBylQTyY= 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=45.249.212.56 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 [172.19.163.216]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4btcYT5fhszKHMq3; Fri, 1 Aug 2025 15:10:53 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id B69351A019B; Fri, 1 Aug 2025 15:10:52 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgDHjxByaIxoqAzACA--.18978S13; Fri, 01 Aug 2025 15:10:52 +0800 (CST) From: Yu Kuai To: hch@lst.de, corbet@lwn.net, song@kernel.org, yukuai3@huawei.com, agk@redhat.com, snitzer@kernel.org, mpatocka@redhat.com, linan122@huawei.com, xni@redhat.com, hare@suse.de Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, dm-devel@lists.linux.dev, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com, johnny.chenyi@huawei.com Subject: [PATCH v5 09/11] md: add a new recovery_flag MD_RECOVERY_LAZY_RECOVER Date: Fri, 1 Aug 2025 15:03:44 +0800 Message-Id: <20250801070346.4127558-10-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250801070346.4127558-1-yukuai1@huaweicloud.com> References: <20250801070346.4127558-1-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: gCh0CgDHjxByaIxoqAzACA--.18978S13 X-Coremail-Antispam: 1UD129KBjvJXoWxGry5Jr4kGrW8tF43uw1xKrg_yoW5ur4Dpa yxAF98Cr4UJFW3Z3y7t3WDWrW5Zr10qrWqyFW3Was8JF90yFySyF15W3W7JrWDJa92ya12 qw1DAFZrZF1F9w7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmS14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCY1x0262kKe7AKxVW8ZVWrXwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkE bVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67 AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI 42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF 4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBI daVFxhVjvjDU0xZFpf9x0pRQJ5wUUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: Yu Kuai This flag is used by llbitmap in later patches to skip raid456 initial recover and delay building initial xor data to first write. Signed-off-by: Yu Kuai Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Reviewed-by: Li Nan --- drivers/md/md.c | 14 +++++++++++++- drivers/md/md.h | 2 ++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 2dc8234d19f5..69bf55d4a422 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -9165,6 +9165,14 @@ static sector_t md_sync_position(struct mddev *mddev= , enum sync_action action) start =3D rdev->recovery_offset; rcu_read_unlock(); =20 + /* + * If there are no spares, and raid456 lazy initial recover is + * requested. + */ + if (test_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery) && + start =3D=3D MaxSector) + start =3D 0; + /* If there is a bitmap, we need to make sure all * writes that started before we added a spare * complete before we start doing a recovery. @@ -9724,6 +9732,7 @@ static bool md_choose_sync_action(struct mddev *mddev= , int *spares) =20 set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); + clear_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery); return true; } =20 @@ -9732,6 +9741,7 @@ static bool md_choose_sync_action(struct mddev *mddev= , int *spares) remove_spares(mddev, NULL); set_bit(MD_RECOVERY_SYNC, &mddev->recovery); clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); + clear_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery); return true; } =20 @@ -9741,7 +9751,7 @@ static bool md_choose_sync_action(struct mddev *mddev= , int *spares) * re-add. */ *spares =3D remove_and_add_spares(mddev, NULL); - if (*spares) { + if (*spares || test_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery)) { clear_bit(MD_RECOVERY_SYNC, &mddev->recovery); clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); @@ -9954,6 +9964,7 @@ void md_check_recovery(struct mddev *mddev) } =20 clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery); + clear_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery); clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery); clear_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags); =20 @@ -10064,6 +10075,7 @@ void md_reap_sync_thread(struct mddev *mddev) clear_bit(MD_RECOVERY_RESHAPE, &mddev->recovery); clear_bit(MD_RECOVERY_REQUESTED, &mddev->recovery); clear_bit(MD_RECOVERY_CHECK, &mddev->recovery); + clear_bit(MD_RECOVERY_LAZY_RECOVER, &mddev->recovery); /* * We call mddev->cluster_ops->update_size here because sync_size could * be changed by md_update_sb, and MD_RECOVERY_RESHAPE is cleared, diff --git a/drivers/md/md.h b/drivers/md/md.h index 4fa5a3e68a0c..7b6357879a84 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -667,6 +667,8 @@ enum recovery_flags { MD_RECOVERY_RESHAPE, /* remote node is running resync thread */ MD_RESYNCING_REMOTE, + /* raid456 lazy initial recover */ + MD_RECOVERY_LAZY_RECOVER, }; =20 enum md_ro_state { --=20 2.39.2