From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from va-2-29.ptr.blmpb.com (va-2-29.ptr.blmpb.com [209.127.231.29]) (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 B653033CE9A for ; Sat, 11 Jul 2026 10:04:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.127.231.29 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783764260; cv=none; b=fsAd0Xx5I/DDmKlpqxNUYtFj3V1xBGDFiAJ2FTluM4zM3kCTrsELGH2ksri17C9fBHK3/4sdbi5eaGMh+S745OQ0aGCgnjaQg/ITOj9zL1buQ/l8Oc0yK1WhxtMmCZnHIlyijbU3ERLMOEnI8s122JQrLjGkcnqoGp5Hmyx19wQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783764260; c=relaxed/simple; bh=zO9S3Uc7S2ENZZD/Yj6G28n9IT9h2LxDSHVCu7650wE=; h=From:Mime-Version:References:Message-Id:In-Reply-To:Content-Type: To:Cc:Date:Subject; b=F0ZBpDLsE0MZiRKXuLqVo62Bv+EDNe9IZtVuJx7Mid7lVnnbBsjQ0JyB2/3aeEEDHE4IafUBSaLtsqOgdF2uVI/83OXmkyN4nl/YiLi/XL7+pf7PiP/saaLEAh0C/Wtym05U6bdU/uYxcWTR25aPBh4hWWxCNB2XGXPT7I6OG3A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fnnas.com; spf=pass smtp.mailfrom=fnnas.com; dkim=pass (2048-bit key) header.d=fnnas-com.20200927.dkim.feishu.cn header.i=@fnnas-com.20200927.dkim.feishu.cn header.b=Eax8Ju0i; arc=none smtp.client-ip=209.127.231.29 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=fnnas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fnnas.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fnnas-com.20200927.dkim.feishu.cn header.i=@fnnas-com.20200927.dkim.feishu.cn header.b="Eax8Ju0i" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; s=s1; d=fnnas-com.20200927.dkim.feishu.cn; t=1783764250; h=from:subject:mime-version:from:date:message-id:subject:to:cc: reply-to:content-type:mime-version:in-reply-to:message-id; bh=4MCbwe4EZJW2QS9n0NC3Qy3hAR1knQgcIejgOVgPr3Q=; b=Eax8Ju0iTPe1Dv/SgwgPPyHu4saZfkQwzYd8Pi6FE3Oxd+facnmmsneUZFkMk54yTKZVRP mWRYoeldX+j7K/GQjOzrpp11veFH/5feulFSBh1pw0izBy+2g9+Sdynri3oHk3ml9yFj7N pVI3S9BCK7CpS4I1uq474iOdBAT73+WOakieZGTbS/MhqRmSyCyXNX7ijkrxjey0w2qrTS 41+Bwri6OUteELW7Gf/R9wlh9TB5NMAajNKmca++hcwvs+bl87FknGcFk8J3N06sOKfk48 o3d9bMJr+COc3GIwokxSYMbuykHxkjFoth7MHGyYcLyOaez6EiisD8eNzeJN0Q== From: "Chen Cheng" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit References: <20260711100352.425177-1-chencheng@fnnas.com> Message-Id: <20260711100352.425177-2-chencheng@fnnas.com> In-Reply-To: <20260711100352.425177-1-chencheng@fnnas.com> X-Mailer: git-send-email 2.54.0 Content-Type: text/plain; charset=UTF-8 To: , Cc: , Date: Sat, 11 Jul 2026 18:03:50 +0800 Received: from fedora ([183.34.162.102]) by smtp.feishu.cn with ESMTPS; Sat, 11 Jul 2026 18:04:08 +0800 X-Lms-Return-Path: Subject: [PATCH v7 1/3] md: suspend array when sync_action=reshape X-Original-From: chencheng@fnnas.com From: Chen Cheng raid10 needs to resize/swap r10bio_pool when reshape changes raid_disks, and, don't let new requests keep allocating r10bio objects from the old pool while that transition is in progress. suspend and lock array before mddev_start_reshape(), and resume it on exit. Other sync_action ops are unchanged. Signed-off-by: Chen Cheng --- drivers/md/md.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 096bb64e87bd..8ee2dcc116eb 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5261,25 +5261,32 @@ action_store(struct mddev *mddev, const char *page, size_t len) enum sync_action action; if (!mddev->pers || !mddev->pers->sync_request) return -EINVAL; + action = md_sync_action_by_name(page); + if (action == ACTION_RESHAPE) { + ret = mddev_suspend(mddev, true); + if (ret) + return ret; + } retry: if (work_busy(&mddev->sync_work)) flush_work(&mddev->sync_work); ret = mddev_lock(mddev); - if (ret) + if (ret) { + if (action == ACTION_RESHAPE) + mddev_resume(mddev); return ret; + } if (work_busy(&mddev->sync_work)) { mddev_unlock(mddev); goto retry; } - action = md_sync_action_by_name(page); - /* TODO: mdadm rely on "idle" to start sync_thread. */ if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { switch (action) { case ACTION_FROZEN: md_frozen_sync_thread(mddev); @@ -5345,10 +5352,12 @@ action_store(struct mddev *mddev, const char *page, size_t len) sysfs_notify_dirent_safe(mddev->sysfs_action); ret = len; out: mddev_unlock(mddev); + if (action == ACTION_RESHAPE) + mddev_resume(mddev); return ret; } static struct md_sysfs_entry md_scan_mode = __ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store); -- 2.54.0