From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f44.google.com (mail-ej1-f44.google.com [209.85.218.44]) (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 6C00F53368 for ; Fri, 31 Jan 2025 17:16:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738343795; cv=none; b=fI1IxzbWxS2QHQk6oHUPxAHw66JauianYm5HgMpQb+w+7vBU1Lpn/O+oT67ft0oBorR3JFLBR8mb+Jb2jH5IuBW9oncQCzcbfi0ZuOW6HU9p0en1fIly9+U4z5wMQAFo9vTbwuGvCIE/FCF0v0lhGh8Hd3MV0vgIlf2AoVEmU/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738343795; c=relaxed/simple; bh=IJpXKd7iwRYoZffANHjuO9WmlQvJWizra56J/pdegfA=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=lb4+df8KP/uitF3a+B7zj/RsIdf3BDjJ0NZu2mBx0Db6aT/c1XEmciWMXnZW8MDmBNb9KKckLT8f9UESf/aObIVGv93kvuZLoasmSANEoTETqs3n1S7NGEJFeutP0HQSCjAhWGnT+kTVAwzUebbWApzx8lLdB7G5p9t+DSy/NNs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ionos.com; spf=pass smtp.mailfrom=ionos.com; dkim=pass (2048-bit key) header.d=ionos.com header.i=@ionos.com header.b=Vt4jj7fU; arc=none smtp.client-ip=209.85.218.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ionos.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ionos.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ionos.com header.i=@ionos.com header.b="Vt4jj7fU" Received: by mail-ej1-f44.google.com with SMTP id a640c23a62f3a-aaf900cc7fbso480339366b.3 for ; Fri, 31 Jan 2025 09:16:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ionos.com; s=google; t=1738343791; x=1738948591; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=kqSRqdRuMVUS0hR3bXfCSvdzWeHIS96mx4dwh5De168=; b=Vt4jj7fUBJFyOLCUAOxOfXiwNgXuFY6Q0+0QTv81LcG8cTFIqNrdA3c1ZrI2WUjgYC hgipZhXShaTH9CzqvPAOlko6JWk3hdwWhJuPSDgQ82X0XVB+dQAV/yGaxF5PTSszLoZb gZW8e2Nd3To8gCqeaRHdoXBwmelP7wj7rPYnAZc+SJIl3H6o5TCVfh5YACEohsO3mWX2 665MBzMXP6VStOKIIQO/zR1bSm3N8h+pMgKDQYpbtNrBkxKfwzBx7uXec8c0e9FKTS3Q r2umxkGhv0kTE61CmmqKmzJKcbAFpa0FWPBRcpVxehhjwOC3gcFGQFO+Ljixn9e5i3L/ UNHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738343791; x=1738948591; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kqSRqdRuMVUS0hR3bXfCSvdzWeHIS96mx4dwh5De168=; b=dUGCr0C3ovZwW9KLP3LZ7r8htYeejB3MgEySFf6+Y+op4xKtHdnUtVksk5dgjLunqm uqQ8rmQsCfQyiqQquwf3QagfbiWFK45RqPXTVh5EaCmxfM+mLJfd2QB7hAlX2yqPE9r3 lZk0aU8uHWUwujs6qaR0ij7oIhY02NkE+kr0KX+QPkocjMbFqpzxwv8dzacXBH8Nc+cF ViSjfGkYAa3KfapCAXConRewpyQ6RMWLgqn7bEo67ZZFCd+LhS7zNJZvmSidgy6BDLrh XrlkkqDJd2BAP7yayVJ31Q8hyAMFSFzyA9p6caXkxyF8gW7EriRUxTw06uIJSP7zR9GG bnUg== X-Forwarded-Encrypted: i=1; AJvYcCXJIIb3K0Cu6NPxAMOmzprbqaTbiNjudfDBjVG7yVl5qk8OvHFQnAujjtJ7wpXPLhUEhESCxLYU+A==@vger.kernel.org X-Gm-Message-State: AOJu0YztyFRaiiv9roSZEoLSTwK8KwIlKvVi+RcbJWWLGenNy7sb76Ag lGjGP++egFC02jSWVddXDBH8Sg8y9If1318u3wmfOzNiIGXYxfApmR5lhXCyEd5kW6tT6bxS7T2 WArvKM8zBCcyWf68n/SDg+hMFSZavsgrYFE/QpQ== X-Gm-Gg: ASbGnctXGHKtmZziheACgtoXi98zZ8pJ3NcVKZEpj+MsMtfyS700u6ASeIEPRs7l+vo EK5+wLjQYWbUBfjw2uiJiUCJbphxOJPE6zTCEB5ixLqBOJIsp8V4wAgioNC8EujyckjhEJ8A/ex sincN/AR3E5ncbMTOYurpEa32ZQA== X-Google-Smtp-Source: AGHT+IFrg/3LHjJ/lnlIA5OZd/lPJwrUoD7pnmT/wTf5Yed08bwxEvL1yRpJsQHHZdHQcPsit+hXF79AJUi6y8BFTXI= X-Received: by 2002:a17:907:728c:b0:ab3:64dd:bc89 with SMTP id a640c23a62f3a-ab6cfce265fmr1329620366b.20.1738343790697; Fri, 31 Jan 2025 09:16:30 -0800 (PST) Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250128133927.3989681-1-max.kellermann@ionos.com> <20250128133927.3989681-9-max.kellermann@ionos.com> <794043b6-4008-448e-b241-1390aa91d2ab@gmail.com> In-Reply-To: <794043b6-4008-448e-b241-1390aa91d2ab@gmail.com> From: Max Kellermann Date: Fri, 31 Jan 2025 18:16:19 +0100 X-Gm-Features: AWEUYZngMvc8L7CbnAKSWZY60DE5_wFqVJVZxAc2vuwSHc9kVxszNfA2g1obggI Message-ID: Subject: Re: [PATCH 8/8] io_uring: skip redundant poll wakeups To: Pavel Begunkov Cc: axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Jan 31, 2025 at 2:54=E2=80=AFPM Pavel Begunkov wrote: > | // it's still 0, wake up is lost I think I misunderstood how these polling functions in the kernel work - thanks for the explanation, Pavel. This one patch is indeed flawed, and I'll try to come up with something better.