From patchwork Wed Aug 21 14:16:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 13771657 Received: from mail-io1-f43.google.com (mail-io1-f43.google.com [209.85.166.43]) (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 B12911AF4ED for ; Wed, 21 Aug 2024 14:19:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724249957; cv=none; b=HBV6kauUO5B1BiwYrjlMWrBZkbMVYOxpb7ZjoFm3ZHfbw2FX2sRX1KA8YHvFqjdOX/whrbRw8YfgoGTflwkNCuu1I7Cxrga7+8uXTC8zLg7gej6BrGalLfwN4iGhWFoALFOqw1yxClOnRdcBf7HAL5iDUVGkIOBFZ1WwBxM62WE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724249957; c=relaxed/simple; bh=VQY2AbWmYzmJa+BvEd4NBvoFPgkwUcD+DdlnfHAS3AA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JX/yKF5QCLcjt4zIVJIczDgrzA1SKJs6L1n7PJADAH3Wd8O0BrbYx9tby2d8B3Woa2JK4keUjjoERDlRdZF2WylwIKSpCooXcDjbQx7sizQhdkOtkR1TPotsJj9Dnid3Caz2T9o6MNQI8EyJ6NdYeOAGvNK7wamRjK3x0qT0Mr0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=rOyZGsGV; arc=none smtp.client-ip=209.85.166.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="rOyZGsGV" Received: by mail-io1-f43.google.com with SMTP id ca18e2360f4ac-81fd1e1d38bso365100339f.1 for ; Wed, 21 Aug 2024 07:19:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1724249954; x=1724854754; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jFCcMIWHME8JN9Gx6FSrjmoKIn8+i+WeAhjeL4V+qIE=; b=rOyZGsGVHcx2wSdBdu7jJ2Az/g2V42JK9LgM8/BnBoyz44v3BKeWwSjVmZziNnikv6 64RYHFLNkT3XFcDOfKpPzM3X29NCX/L6devztElf8a2k01iGgPbL5WWMOn31fNL363dq gElWzje1bG7DE9o8UnVTi5H9ZBX9sUR871z3FneCxWryRaY3D9kUSvArppW2wV4yS9NT +A5vTsPhek2Y4nyYcbidlaRoYftlQ+IzC1Qs2GefrdR4XPu+LAyQGKktz4nNDDuzBt20 ltg17b/uKu5bcljISuZOizooVCIU83Ca3IyUe7PSMLOVlICJYx8lvgFN1CjBtN4E1M8W 2u9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724249954; x=1724854754; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jFCcMIWHME8JN9Gx6FSrjmoKIn8+i+WeAhjeL4V+qIE=; b=aOqGWX4ba2UlDremZL5qfgd7KDOcXcO0rGT+8r0sHGBav/qfFLRFyLXG9E8ru8i5pg d4gL0pD7bIL29N9VEG5cebvWe4B88Gszi0WNAjH5wVM/eRZ6//0u/X6kSqczEs8rEVPE jPQTDVzjp42XaCCXNSTGuPwcYdQLK+hK1ReyXRyUv7ywffscnYl6Bt1c+fNG8q/Mepkt wdcFdp3JhzoL/Q0UDPbcdVNVI5OWzmGXpggCwFD0BcPby62BYKbfW0VcFzH2ZrEjxSSv 88WR7QtBPnaO1Qs1F+Gvc5L3qIVNUpZRiBGjxz02ZnUI2wPEKyCEQWydctJyJJe7SMi8 hq9A== X-Gm-Message-State: AOJu0Yzua16XFUt8eE3EWzp7oBqopSKjRENpv4PBeot5LJ5j2i0WTak+ 3QmpGUzOWFHaVATPSR9CtMiaxAB55OXxEt80J0ML0XNVmFgQG7rs6T/F1wiHNTIaLDVERRHwht9 7 X-Google-Smtp-Source: AGHT+IG9psSgP1tmj+j1eU+szjm1hn/x7grDMXlbo+8xvA1EJg02Kru+3oSryJTspV+znRglW7pfDA== X-Received: by 2002:a05:6e02:1a8e:b0:39d:35f2:6ed7 with SMTP id e9e14a558f8ab-39d6c3bc3bemr26200055ab.27.1724249954320; Wed, 21 Aug 2024 07:19:14 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-39d1eb0bc93sm50967285ab.19.2024.08.21.07.19.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2024 07:19:13 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org Cc: dw@davidwei.uk, Jens Axboe Subject: [PATCH 2/5] io_uring: move schedule wait logic into helper Date: Wed, 21 Aug 2024 08:16:23 -0600 Message-ID: <20240821141910.204660-3-axboe@kernel.dk> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240821141910.204660-1-axboe@kernel.dk> References: <20240821141910.204660-1-axboe@kernel.dk> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In preparation for expanding how we handle waits, move the actual schedule and schedule_timeout() handling into a helper. Signed-off-by: Jens Axboe --- io_uring/io_uring.c | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 37053d32c668..9e2b8d4c05db 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2350,22 +2350,10 @@ static bool current_pending_io(void) return percpu_counter_read_positive(&tctx->inflight); } -/* when returns >0, the caller should retry */ -static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx, - struct io_wait_queue *iowq) +static int __io_cqring_wait_schedule(struct io_ring_ctx *ctx, + struct io_wait_queue *iowq) { - int ret; - - if (unlikely(READ_ONCE(ctx->check_cq))) - return 1; - if (unlikely(!llist_empty(&ctx->work_llist))) - return 1; - if (unlikely(test_thread_flag(TIF_NOTIFY_SIGNAL))) - return 1; - if (unlikely(task_sigpending(current))) - return -EINTR; - if (unlikely(io_should_wake(iowq))) - return 0; + int ret = 0; /* * Mark us as being in io_wait if we have pending requests, so cpufreq @@ -2374,7 +2362,6 @@ static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx, */ if (current_pending_io()) current->in_iowait = 1; - ret = 0; if (iowq->timeout == KTIME_MAX) schedule(); else if (!schedule_hrtimeout_range_clock(&iowq->timeout, 0, @@ -2384,6 +2371,24 @@ static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx, return ret; } +/* If this returns > 0, the caller should retry */ +static inline int io_cqring_wait_schedule(struct io_ring_ctx *ctx, + struct io_wait_queue *iowq) +{ + if (unlikely(READ_ONCE(ctx->check_cq))) + return 1; + if (unlikely(!llist_empty(&ctx->work_llist))) + return 1; + if (unlikely(test_thread_flag(TIF_NOTIFY_SIGNAL))) + return 1; + if (unlikely(task_sigpending(current))) + return -EINTR; + if (unlikely(io_should_wake(iowq))) + return 0; + + return __io_cqring_wait_schedule(ctx, iowq); +} + struct ext_arg { size_t argsz; struct __kernel_timespec __user *ts;