From mboxrd@z Thu Jan 1 00:00:00 1970 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 5BB61C43334 for ; Mon, 27 Jun 2022 13:36:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235950AbiF0NgJ (ORCPT ); Mon, 27 Jun 2022 09:36:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234557AbiF0NgJ (ORCPT ); Mon, 27 Jun 2022 09:36:09 -0400 Received: from out0.migadu.com (out0.migadu.com [IPv6:2001:41d0:2:267::]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBCF56362 for ; Mon, 27 Jun 2022 06:36:08 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1656336967; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=BX61HmQlVCCZmq3PJ/mL1vyIpiqCl6HtuPRTd4Rejt4=; b=gWj/IMcf4ROC5UwAFuMrE+lgGOPW0eaQRxChHddtXm7VJLP8IfBQ/677VckKQswlFG9srC PrD3wxlF3PnI7og8UxH77joIkjC0PLmNObM+CfGXE/9CgxGJvaVqYEddqSd7g6vKyGQ7EF FHId7i+tE+jVam8AaKBU3Zc7+uQ1IWE= From: Hao Xu To: io-uring@vger.kernel.org Cc: Jens Axboe , Pavel Begunkov Subject: [PATCH 06/11] io-wq: fixed worker exit Date: Mon, 27 Jun 2022 21:35:36 +0800 Message-Id: <20220627133541.15223-7-hao.xu@linux.dev> In-Reply-To: <20220627133541.15223-1-hao.xu@linux.dev> References: <20220627133541.15223-1-hao.xu@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Hao Xu Implement the fixed worker exit Signed-off-by: Hao Xu --- io_uring/io-wq.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c index 70240b847112..11fe5787c409 100644 --- a/io_uring/io-wq.c +++ b/io_uring/io-wq.c @@ -264,6 +264,29 @@ static bool io_task_worker_match(struct callback_head *cb, void *data) return worker == data; } +static void io_fixed_worker_exit(struct io_worker *worker) +{ + int *nr_fixed; + int index = worker->acct.index; + struct io_wqe *wqe = worker->wqe; + struct io_wqe_acct *acct = io_get_acct(wqe, index == 0, true); + struct io_worker **fixed_workers; + + raw_spin_lock(&acct->lock); + fixed_workers = acct->fixed_workers; + if (!fixed_workers || worker->index == -1) { + raw_spin_unlock(&acct->lock); + return; + } + nr_fixed = &acct->nr_fixed; + /* reuse variable index to represent fixed worker index in its array */ + index = worker->index; + fixed_workers[index] = fixed_workers[*nr_fixed - 1]; + (*nr_fixed)--; + fixed_workers[index]->index = index; + raw_spin_unlock(&acct->lock); +} + static void io_worker_exit(struct io_worker *worker) { struct io_wqe *wqe = worker->wqe; @@ -687,6 +710,7 @@ static int io_wqe_worker(void *data) struct io_wqe *wqe = worker->wqe; struct io_wq *wq = wqe->wq; bool last_timeout = false; + bool fixed = worker->flags & IO_WORKER_F_FIXED; char buf[TASK_COMM_LEN]; worker->flags |= (IO_WORKER_F_UP | IO_WORKER_F_RUNNING); @@ -737,6 +761,8 @@ static int io_wqe_worker(void *data) if (test_bit(IO_WQ_BIT_EXIT, &wq->state)) io_worker_handle_work(worker); + if (fixed) + io_fixed_worker_exit(worker); audit_free(current); io_worker_exit(worker); -- 2.25.1