From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 487C520C012; Wed, 25 Feb 2026 01:45:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983908; cv=none; b=RjiQ4HH3i2NR6cI/k9SMvxhB2krM7Ywb4F70gOjBlQ9z6QfOqKKhipHc4da662pISqF6FRqdxxjp5b13rwaYAutrfeqTWnHxi/y+kIB1XhP3kfv4YGMWpuqJR8CMsdZo+LJW3G7rNmJvnmUofH5pQRcs5S9fOkk5oIs5W7aHNiw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983908; c=relaxed/simple; bh=gDZYe6zWDHDtdJMTEoowy2y92/Ttb7SbVZIrYe5P5m0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U6VcHZc5HiawkmrmVJMzHbVtT9RB0rwGnkTtOcfGVTXCmJLs4g8kPa7YpOY1TA1wor9u/MI278JuY6FTvE524yBY02gUjTzr+tNKFsHkM5UFAuXbjsybnS/n21BK2Ge50sw/xMl6ZK+ctwJCBFthtXhy7PDTqS0Sg8FkmT0kQLs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=uEB+7Nmj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uEB+7Nmj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A824C116D0; Wed, 25 Feb 2026 01:45:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1771983908; bh=gDZYe6zWDHDtdJMTEoowy2y92/Ttb7SbVZIrYe5P5m0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uEB+7NmjJScc2Xw2yxO7bDFBhge9o/hbGEZmngilzqv54QCLCkxURqskeAIwRv+CG pkUXXipS9094jh2G49TyHYBKH/KT7kF9wUgUiETr4OFtoGW8Bl8PODmzJQWpOOscCM 4WUTvgj5MZa8Ju2GGz34f7LF3WJ4R3ytCJ+7up70= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lai Jiangshan , Tejun Heo , Sasha Levin Subject: [PATCH 6.18 175/641] workqueue: Only assign rescuer work when really needed Date: Tue, 24 Feb 2026 17:18:21 -0800 Message-ID: <20260225012353.275439761@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lai Jiangshan [ Upstream commit 7b05c90b3302cf3d830dfa6f8961376bcaf43b94 ] If the pwq does not need rescue (normal workers have been created or become available), the rescuer can immediately move on to other stalled pwqs. Signed-off-by: Lai Jiangshan Signed-off-by: Tejun Heo Stable-dep-of: e5a30c303b07 ("workqueue: Process rescuer work items one-by-one using a cursor") Signed-off-by: Sasha Levin --- kernel/workqueue.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 2fa3187101725..f678200ce8692 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -3448,6 +3448,10 @@ static bool assign_rescuer_work(struct pool_workqueue *pwq, struct worker *rescu struct worker_pool *pool = pwq->pool; struct work_struct *work, *n; + /* need rescue? */ + if (!pwq->nr_active || !need_to_create_worker(pool)) + return false; + /* * Slurp in all works issued via this workqueue and * process'em. -- 2.51.0