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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44716C433EF for ; Mon, 27 Sep 2021 06:17:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F9B761157 for ; Mon, 27 Sep 2021 06:17:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232450AbhI0GTJ (ORCPT ); Mon, 27 Sep 2021 02:19:09 -0400 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:60698 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232950AbhI0GTI (ORCPT ); Mon, 27 Sep 2021 02:19:08 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R531e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04400;MF=haoxu@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0UpiKFOp_1632723441; Received: from e18g09479.et15sqa.tbsite.net(mailfrom:haoxu@linux.alibaba.com fp:SMTPD_---0UpiKFOp_1632723441) by smtp.aliyun-inc.com(127.0.0.1); Mon, 27 Sep 2021 14:17:29 +0800 From: Hao Xu To: Jens Axboe Cc: io-uring@vger.kernel.org, Pavel Begunkov , Joseph Qi Subject: [PATCH 7/8] io_uring: add tw_ctx for io_uring_task Date: Mon, 27 Sep 2021 14:17:20 +0800 Message-Id: <20210927061721.180806-8-haoxu@linux.alibaba.com> X-Mailer: git-send-email 2.24.4 In-Reply-To: <20210927061721.180806-1-haoxu@linux.alibaba.com> References: <20210927061721.180806-1-haoxu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Add tw_ctx to represent whether there is only one ctx in prior_task_list or not, this is useful in the next patch Signed-off-by: Hao Xu --- fs/io_uring.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/io_uring.c b/fs/io_uring.c index 48387ea47c15..596e9e885362 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -477,6 +477,7 @@ struct io_uring_task { struct io_wq_work_list task_list; struct callback_head task_work; struct io_wq_work_list prior_task_list; + struct io_ring_ctx *tw_ctx; unsigned int nr; unsigned int prior_nr; bool task_running; @@ -2222,6 +2223,10 @@ static void io_req_task_work_add(struct io_kiocb *req, bool emergency) if (emergency && tctx->prior_nr * MAX_EMERGENCY_TW_RATIO < tctx->nr) { wq_list_add_tail(&req->io_task_work.node, &tctx->prior_task_list); tctx->prior_nr++; + if (tctx->prior_nr == 1) + tctx->tw_ctx = req->ctx; + else if (tctx->tw_ctx && req->ctx != tctx->tw_ctx) + tctx->tw_ctx = NULL; } else { wq_list_add_tail(&req->io_task_work.node, &tctx->task_list); } @@ -2250,6 +2255,7 @@ static void io_req_task_work_add(struct io_kiocb *req, bool emergency) spin_lock_irqsave(&tctx->task_lock, flags); tctx->nr = tctx->prior_nr = 0; + tctx->tw_ctx = NULL; tctx->task_running = false; wq_list_merge(&tctx->prior_task_list, &tctx->task_list); node = tctx->prior_task_list.first; -- 2.24.4