From patchwork Tue May 23 02:10:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13251354 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 5A16DC7EE26 for ; Tue, 23 May 2023 02:13:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232716AbjEWCNx (ORCPT ); Mon, 22 May 2023 22:13:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34742 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230017AbjEWCNw (ORCPT ); Mon, 22 May 2023 22:13:52 -0400 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1DD171BC; Mon, 22 May 2023 19:13:37 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.153]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4QQHt51L8Yz4f3m6q; Tue, 23 May 2023 10:13:33 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgBH_rFMIWxkwVsOKA--.63694S4; Tue, 23 May 2023 10:13:34 +0800 (CST) From: Yu Kuai To: logang@deltatee.com, song@kernel.org Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH v8 0/5] md: protect md_thread with rcu Date: Tue, 23 May 2023 10:10:12 +0800 Message-Id: <20230523021017.3048783-1-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-CM-TRANSID: gCh0CgBH_rFMIWxkwVsOKA--.63694S4 X-Coremail-Antispam: 1UD129KBjvJXoW7WrWfCry5Cr45Cr4DZFW8WFg_yoW8Zr1DpF W3KF9xXr4UCrsxZFsxZ347Ca45G3Z5Kay7KryIyw1rZa45uryUJr4xJFykuF9rWFyfJa9F qF15Jw1DCa40yaDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUyK14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1l42xK82IYc2Ij64vI r41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8Gjc xK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0 cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8V AvwI8IcIk0rVWrJr0_WFyUJwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF 7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUoOJ5UUUUU X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org From: Yu Kuai Changes in v8: - fix that another unrelated patch is merged into this patchset - update commit message for patch 5 - rebase on the top of another patch from me: [PATCH v3] md: fix duplicate filename for rdev Changes in v7: - add missing changes for md-cluster - rebase for the latest md-next branch Changes in v6: - remove first patch from v5, and use rcu_asign_pointer() directly from caller. - always use rcu_read_lock/unlock to protect mddev_set_timeout(). Changes in v5: - use rcu_dereference_protected() instead of rcu_access_pointer() where rcu_read_lock/unlock is not required. - add patch 4,5 to handle that bitmap timeout is set multiple times. Changes in v4: - remove patch 2 from v3 - fix sparse errors and warnings from v3, in order to do that, all access to md_thread need to be modified, patch 2-4 is splited to avoid a huge patch. Changes in v3: - remove patch 3 from v2 - use rcu instead of a new lock Changes in v2: - fix a compile error for md-cluster in patch 2 - replace spin_lock/unlock with spin_lock/unlock_irq in patch 5 - don't wake up inside the new lock in md wakeup_thread in patch 5 Yu Kuai (5): md: factor out a helper to wake up md_thread directly dm-raid: remove useless checking in raid_message() md/bitmap: always wake up md_thread in timeout_store md/bitmap: factor out a helper to set timeout md: protect md_thread with rcu drivers/md/dm-raid.c | 4 +- drivers/md/md-bitmap.c | 43 +++++++++++-------- drivers/md/md-cluster.c | 17 +++++--- drivers/md/md-multipath.c | 4 +- drivers/md/md.c | 88 +++++++++++++++++++++------------------ drivers/md/md.h | 8 ++-- drivers/md/raid1.c | 7 ++-- drivers/md/raid1.h | 2 +- drivers/md/raid10.c | 20 +++++---- drivers/md/raid10.h | 2 +- drivers/md/raid5-cache.c | 22 ++++++---- drivers/md/raid5.c | 15 +++---- drivers/md/raid5.h | 2 +- 13 files changed, 132 insertions(+), 102 deletions(-)