From nobody Tue Oct 7 21:27:41 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 3F8AA1B983F; Mon, 7 Jul 2025 01:32:40 +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=1751851963; cv=none; b=JDDe6L24G7uW27KphYbdF7R0hwPlE4+jgxnM7E3Ll3gdIYIKWplsIE3zVLS8hKyeZJ4RHTD5+WESWG0YDAqSjGY5oHdebE6EMHlfWPebWMWndSHS589JJsqvlPOhdwgpWu5Pu01+f/WED9iI0zWzez5+V+GZoe0osArPzrCJ7CY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751851963; c=relaxed/simple; bh=MidPMLWlgoLJE4H68Ndj32hIGOHlav/sP+7iUTFZVt0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TRlH/XmVKdvdEP7NFSFHGdEe0or9oLItDnE19vZ20HeULM6NRF5JfXBq5+Mn3DnUrKkydaxe/EnyQefHos1HuZwq1ASfxEzPV8Xo42NG+UbMA9m+C3d/o/3fLei8p8Q83JZbkGbe4Ypls5iSI34qFcrmsjNvnssz5NfHSZyPF7s= 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 ESMTPS id 4bb6Dl3g9dzYQtrm; Mon, 7 Jul 2025 09:32:39 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.252]) by mail.maildlp.com (Postfix) with ESMTP id 57BC51A1239; Mon, 7 Jul 2025 09:32:38 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP3 (Coremail) with SMTP id _Ch0CgDnSCazI2to_nSRAw--.35890S5; Mon, 07 Jul 2025 09:32:38 +0800 (CST) From: Yu Kuai To: agk@redhat.com, snitzer@kernel.org, mpatocka@redhat.com, song@kernel.org, yukuai3@huawei.com Cc: dm-devel@lists.linux.dev, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com, johnny.chenyi@huawei.com Subject: [PATCH v5 01/15] md/raid1: change r1conf->r1bio_pool to a pointer type Date: Mon, 7 Jul 2025 09:26:57 +0800 Message-Id: <20250707012711.376844-2-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250707012711.376844-1-yukuai1@huaweicloud.com> References: <20250707012711.376844-1-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: _Ch0CgDnSCazI2to_nSRAw--.35890S5 X-Coremail-Antispam: 1UD129KBjvJXoWxtF1xCr17WrWkAw43trWfGrg_yoW7WFWxpa 13X3s3Gr4UZrZ3Cr4UJF4DuFyFv3ZagFWxtFWxJa1FvFnYqryrX3WUCry5GryqvFWkKrsr JF98trZxZF17trJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUm014x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67 kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY 6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0x vEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVj vjDU0xZFpf9x0JU4OJ5UUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: Yu Kuai In raid1_reshape(), newpool is a stack variable. mempool_init() initializes newpool->wait with the stack address. After assigning newpool to conf->r1bio_pool, the wait queue need to be reinitialized, which is not ideal. Change raid1_conf->r1bio_pool to a pointer type and replace mempool_init() with mempool_create_kmalloc_pool() to avoid referencing a stack-based wait queue. Signed-off-by: Wang Jinchao Signed-off-by: Yu Kuai --- drivers/md/raid1.c | 39 ++++++++++++++++++--------------------- drivers/md/raid1.h | 2 +- 2 files changed, 19 insertions(+), 22 deletions(-) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index fd4ce2a4136f..8249cbb89fec 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -255,7 +255,7 @@ static void free_r1bio(struct r1bio *r1_bio) struct r1conf *conf =3D r1_bio->mddev->private; =20 put_all_bios(conf, r1_bio); - mempool_free(r1_bio, &conf->r1bio_pool); + mempool_free(r1_bio, conf->r1bio_pool); } =20 static void put_buf(struct r1bio *r1_bio) @@ -1305,9 +1305,8 @@ alloc_r1bio(struct mddev *mddev, struct bio *bio) struct r1conf *conf =3D mddev->private; struct r1bio *r1_bio; =20 - r1_bio =3D mempool_alloc(&conf->r1bio_pool, GFP_NOIO); - /* Ensure no bio records IO_BLOCKED */ - memset(r1_bio->bios, 0, conf->raid_disks * sizeof(r1_bio->bios[0])); + r1_bio =3D mempool_alloc(conf->r1bio_pool, GFP_NOIO); + memset(r1_bio, 0, offsetof(struct r1bio, bios[conf->raid_disks * 2])); init_r1bio(r1_bio, mddev, bio); return r1_bio; } @@ -3084,6 +3083,7 @@ static struct r1conf *setup_conf(struct mddev *mddev) int i; struct raid1_info *disk; struct md_rdev *rdev; + size_t r1bio_size; int err =3D -ENOMEM; =20 conf =3D kzalloc(sizeof(struct r1conf), GFP_KERNEL); @@ -3124,9 +3124,10 @@ static struct r1conf *setup_conf(struct mddev *mddev) if (!conf->poolinfo) goto abort; conf->poolinfo->raid_disks =3D mddev->raid_disks * 2; - err =3D mempool_init(&conf->r1bio_pool, NR_RAID_BIOS, r1bio_pool_alloc, - rbio_pool_free, conf->poolinfo); - if (err) + + r1bio_size =3D offsetof(struct r1bio, bios[mddev->raid_disks * 2]); + conf->r1bio_pool =3D mempool_create_kmalloc_pool(NR_RAID_BIOS, r1bio_size= ); + if (!conf->r1bio_pool) goto abort; =20 err =3D bioset_init(&conf->bio_split, BIO_POOL_SIZE, 0, 0); @@ -3197,7 +3198,7 @@ static struct r1conf *setup_conf(struct mddev *mddev) =20 abort: if (conf) { - mempool_exit(&conf->r1bio_pool); + mempool_destroy(conf->r1bio_pool); kfree(conf->mirrors); safe_put_page(conf->tmppage); kfree(conf->poolinfo); @@ -3310,7 +3311,7 @@ static void raid1_free(struct mddev *mddev, void *pri= v) { struct r1conf *conf =3D priv; =20 - mempool_exit(&conf->r1bio_pool); + mempool_destroy(conf->r1bio_pool); kfree(conf->mirrors); safe_put_page(conf->tmppage); kfree(conf->poolinfo); @@ -3366,17 +3367,14 @@ static int raid1_reshape(struct mddev *mddev) * At the same time, we "pack" the devices so that all the missing * devices have the higher raid_disk numbers. */ - mempool_t newpool, oldpool; + mempool_t *newpool, *oldpool; struct pool_info *newpoolinfo; + size_t new_r1bio_size; struct raid1_info *newmirrors; struct r1conf *conf =3D mddev->private; int cnt, raid_disks; unsigned long flags; int d, d2; - int ret; - - memset(&newpool, 0, sizeof(newpool)); - memset(&oldpool, 0, sizeof(oldpool)); =20 /* Cannot change chunk_size, layout, or level */ if (mddev->chunk_sectors !=3D mddev->new_chunk_sectors || @@ -3408,18 +3406,18 @@ static int raid1_reshape(struct mddev *mddev) newpoolinfo->mddev =3D mddev; newpoolinfo->raid_disks =3D raid_disks * 2; =20 - ret =3D mempool_init(&newpool, NR_RAID_BIOS, r1bio_pool_alloc, - rbio_pool_free, newpoolinfo); - if (ret) { + new_r1bio_size =3D offsetof(struct r1bio, bios[raid_disks * 2]); + newpool =3D mempool_create_kmalloc_pool(NR_RAID_BIOS, new_r1bio_size); + if (!newpool) { kfree(newpoolinfo); - return ret; + return -ENOMEM; } newmirrors =3D kzalloc(array3_size(sizeof(struct raid1_info), raid_disks, 2), GFP_KERNEL); if (!newmirrors) { kfree(newpoolinfo); - mempool_exit(&newpool); + mempool_destroy(newpool); return -ENOMEM; } =20 @@ -3428,7 +3426,6 @@ static int raid1_reshape(struct mddev *mddev) /* ok, everything is stopped */ oldpool =3D conf->r1bio_pool; conf->r1bio_pool =3D newpool; - init_waitqueue_head(&conf->r1bio_pool.wait); =20 for (d =3D d2 =3D 0; d < conf->raid_disks; d++) { struct md_rdev *rdev =3D conf->mirrors[d].rdev; @@ -3460,7 +3457,7 @@ static int raid1_reshape(struct mddev *mddev) set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); =20 - mempool_exit(&oldpool); + mempool_destroy(oldpool); return 0; } =20 diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index 33f318fcc268..652c347b1a70 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -118,7 +118,7 @@ struct r1conf { * mempools - it changes when the array grows or shrinks */ struct pool_info *poolinfo; - mempool_t r1bio_pool; + mempool_t *r1bio_pool; mempool_t r1buf_pool; =20 struct bio_set bio_split; --=20 2.39.2