From patchwork Fri Oct 15 15:14:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sebastian Andrzej Siewior X-Patchwork-Id: 12562371 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 B22B6C43219 for ; Fri, 15 Oct 2021 15:14:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 998526120A for ; Fri, 15 Oct 2021 15:14:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240890AbhJOPQh (ORCPT ); Fri, 15 Oct 2021 11:16:37 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:50778 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240840AbhJOPQg (ORCPT ); Fri, 15 Oct 2021 11:16:36 -0400 From: Sebastian Andrzej Siewior DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1634310868; 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=w48GmUtrByyn7yHGg7JhSjj9SDZrPX8KgOLSu7dqDTM=; b=EzbhwnV8RyW75gNK2HAUscKuXOCZZPQNOwZaYAVjP0XyY1AlTUdNbKDmZkOLqwaeI5EXJe 1VdUJvQ6wh3Oi5PWK7J/QEVr2YeSsP2jTY5AsMUmFYmZls41idZDdd4PvcIIC5bh2XR+DX sZKPN5uR+ae2YQgGwP3BV7gfeMcTbv9ziKhFa7Jb7LCToKtmDvPGQIMQUcSvykCICVeuG0 9FlVL+KOWI4Q0l0sDKnxahXJfWsfAGRNB1cLMMh64ggIThcyDe9Z9iO6G11c5E4CFGmpRB mHq6qA5ZedHzFSOuwDYsdZ4Hl8sHZrtEv5gd0hfY0Ac1Fbo5b7htaM1kiO/KOA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1634310868; 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=w48GmUtrByyn7yHGg7JhSjj9SDZrPX8KgOLSu7dqDTM=; b=5sFeCDNOTqoUw5PGCg7hYbUv1xXyRpcer3II/ar1BKldck5BlKSOQy/ut4BED0W0gI6mNM EFmC0P5oAXY1lcDg== To: linux-block@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org, usb-storage@lists.one-eyed-alien.net Cc: Jens Axboe , Ulf Hansson , "James E.J. Bottomley" , "Martin K. Petersen" , Alan Stern , Greg Kroah-Hartman , Christoph Hellwig , Thomas Gleixner , Sebastian Andrzej Siewior Subject: [RFC PATCH 2/3] mmc: core: Use blk_mq_complete_request_direct(). Date: Fri, 15 Oct 2021 17:14:11 +0200 Message-Id: <20211015151412.3229037-3-bigeasy@linutronix.de> In-Reply-To: <20211015151412.3229037-1-bigeasy@linutronix.de> References: <20211015151412.3229037-1-bigeasy@linutronix.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The completion callback for the sdhci-pci device is invoked from a kworker. I couldn't identify in which context is mmc_blk_mq_req_done() invoke but the remaining caller are from invoked from preemptible context. Here it would make sense to complete the request directly instead scheduling ksoftirqd for its completion. Signed-off-by: Sebastian Andrzej Siewior --- drivers/mmc/core/block.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 431af5e8be2f8..16b4ea0e92c4b 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -2051,7 +2051,8 @@ static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req) mmc_put_card(mq->card, &mq->ctx); } -static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) +static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req, + bool can_sleep) { struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); struct mmc_request *mrq = &mqrq->brq.mrq; @@ -2065,8 +2066,12 @@ static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req) */ if (mq->in_recovery) mmc_blk_mq_complete_rq(mq, req); - else if (likely(!blk_should_fake_timeout(req->q))) - blk_mq_complete_request(req); + else if (likely(!blk_should_fake_timeout(req->q))) { + if (can_sleep) + blk_mq_complete_request_direct(req); + else + blk_mq_complete_request(req); + } mmc_blk_mq_dec_in_flight(mq, req); } @@ -2087,7 +2092,7 @@ void mmc_blk_mq_recovery(struct mmc_queue *mq) mmc_blk_urgent_bkops(mq, mqrq); - mmc_blk_mq_post_req(mq, req); + mmc_blk_mq_post_req(mq, req, true); } static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, @@ -2106,7 +2111,7 @@ static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq, if (prev_req) *prev_req = mq->complete_req; else - mmc_blk_mq_post_req(mq, mq->complete_req); + mmc_blk_mq_post_req(mq, mq->complete_req, true); mq->complete_req = NULL; @@ -2178,7 +2183,8 @@ static void mmc_blk_mq_req_done(struct mmc_request *mrq) mq->rw_wait = false; wake_up(&mq->wait); - mmc_blk_mq_post_req(mq, req); + /* context unknown */ + mmc_blk_mq_post_req(mq, req, false); } static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err) @@ -2238,7 +2244,7 @@ static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq, err = mmc_start_request(host, &mqrq->brq.mrq); if (prev_req) - mmc_blk_mq_post_req(mq, prev_req); + mmc_blk_mq_post_req(mq, prev_req, true); if (err) mq->rw_wait = false;