From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f48.google.com (mail-pj1-f48.google.com [209.85.216.48]) (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 3E20A21503B for ; Tue, 8 Oct 2024 22:28:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728426487; cv=none; b=TommDG+ItkhzKJzsM+t+vB2k1Flt+mkMQez84BD91RnIajg5ElTxKENjT0k0hsoAvFOVzYFQsqvDI8qeuQsT9mMOhKKzGpB3RacCFH+3/hIj7K3dSF/g12Rdicw1CRgbhJMvTaJR4JdLlJYVMjdsdVvwGUTfx095FzdHaKwepYM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728426487; c=relaxed/simple; bh=PeQ+3ZqZao8FTskqbH9VfwLkZaZ1/LLm/N0vThJthsM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Xawjsgm+KREBLU8nGMjCE/OKyglTtxmLauqZcqcCjweaJ7y0pjC12AMRoy9hXtdOI49LyUR8n5+et3rpHRja2FIK6m5126n5I9pRxtxhJt23Yk/qX3w207jft92ofWXT2TnSgi/OUgwvx1qAQANdkblntEo+xmMVo8lCyV7o4wU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fastly.com; spf=pass smtp.mailfrom=fastly.com; dkim=pass (1024-bit key) header.d=fastly.com header.i=@fastly.com header.b=G4vtp/9X; arc=none smtp.client-ip=209.85.216.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=fastly.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fastly.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=fastly.com header.i=@fastly.com header.b="G4vtp/9X" Received: by mail-pj1-f48.google.com with SMTP id 98e67ed59e1d1-2e2976fca23so446769a91.3 for ; Tue, 08 Oct 2024 15:28:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastly.com; s=google; t=1728426485; x=1729031285; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references :mail-followup-to:message-id:subject:cc:to:from:date:from:to:cc :subject:date:message-id:reply-to; bh=5GpPyK5gRQWrst+Fyr+Lsx8V+lp2jzKPbwoFf+V+Wos=; b=G4vtp/9XxuXOyk84EUhUcPlEV5RmXOskkza4Mx0E/x+ObEIANVfRH2EzsGCbQZpIt9 Bub+bhikT1AvbLSWiGU8v3nE3iL8a7/DiDb1fyoBmSs6nPBVaIYKB4A/+NGaF8foZW6W MuSkcJTkpD5lYufFmFK8vMMSZkH8ZjDC+9GXI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728426485; x=1729031285; h=in-reply-to:content-disposition:mime-version:references :mail-followup-to:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=5GpPyK5gRQWrst+Fyr+Lsx8V+lp2jzKPbwoFf+V+Wos=; b=IRT9RxIgO6QNgKMsfRj4RrNr7hJSvKEgeWjJXTGQLUFjygBsGtBBV86D/0WbtA+n0u mxoTL4PZ40bI16RED9GNMmChPr166bcC9Y1r2oomNQAbkKpaQ8Q9bhP/uz4/VUhHormL G45wBuRiw9wMDZ0UYujhBt761dyLPXr9WneUiwd9v3RKeBWlV85HFAWCHjiQ2ASlpmMR eFIivbqbMwPGWVsn1S7hMutvTRxA8Ttg48smkiJnO4fIq97zvu3q5fPt5HpXHgtzgYCs URWGvUF+FFsQ8AzDVOx+X5P4FW/zj2+k7f1XH0z4Nn9orSAhqyI3ALM8vxqwtmGUW765 Jt1Q== X-Forwarded-Encrypted: i=1; AJvYcCWoD6RNrx4VYf/UsyOQ+aLJ5pMDL/933umF/eZpY25iY6PSN5HlWtWwJzmRj0NZ91VHiJNYYyMGQgg=@vger.kernel.org X-Gm-Message-State: AOJu0YzZ05qKSus5yqk0xUG2rC5PHwbJCsxktvM1Dq79LZLJVgHC0Xmz EvI5+cPZPs/XOUE+7J94zI1xDHhZyhRbedL3bUqEECpmsTUhMaW8TNO/4QPzxz4= X-Google-Smtp-Source: AGHT+IE1tXuqOdJ2//PwSHKA9ssLoCKqnAz9+E7C6N37yGYWDeMO+zE60t4b/4luCg6NBXDD2oLj/g== X-Received: by 2002:a17:90a:db07:b0:2d8:3fe8:a195 with SMTP id 98e67ed59e1d1-2e2a22e6e31mr558509a91.4.1728426485495; Tue, 08 Oct 2024 15:28:05 -0700 (PDT) Received: from LQ3V64L9R2 (c-24-6-151-244.hsd1.ca.comcast.net. [24.6.151.244]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c139a32e1sm59872155ad.296.2024.10.08.15.28.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Oct 2024 15:28:05 -0700 (PDT) Date: Tue, 8 Oct 2024 15:28:01 -0700 From: Joe Damato To: Jakub Kicinski Cc: netdev@vger.kernel.org, mkarsten@uwaterloo.ca, skhawaja@google.com, sdf@fomichev.me, bjorn@rivosinc.com, amritha.nambiar@intel.com, sridhar.samudrala@intel.com, willemdebruijn.kernel@gmail.com, "David S. Miller" , Eric Dumazet , Paolo Abeni , Jonathan Corbet , Jiri Pirko , Sebastian Andrzej Siewior , Lorenzo Bianconi , Johannes Berg , "open list:DOCUMENTATION" , open list Subject: Re: [RFC net-next v4 5/9] net: napi: Add napi_config Message-ID: Mail-Followup-To: Joe Damato , Jakub Kicinski , netdev@vger.kernel.org, mkarsten@uwaterloo.ca, skhawaja@google.com, sdf@fomichev.me, bjorn@rivosinc.com, amritha.nambiar@intel.com, sridhar.samudrala@intel.com, willemdebruijn.kernel@gmail.com, "David S. Miller" , Eric Dumazet , Paolo Abeni , Jonathan Corbet , Jiri Pirko , Sebastian Andrzej Siewior , Lorenzo Bianconi , Johannes Berg , "open list:DOCUMENTATION" , open list References: <20241001235302.57609-1-jdamato@fastly.com> <20241001235302.57609-6-jdamato@fastly.com> <20241008151701.6f8bb389@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241008151701.6f8bb389@kernel.org> On Tue, Oct 08, 2024 at 03:17:01PM -0700, Jakub Kicinski wrote: > On Tue, 1 Oct 2024 23:52:36 +0000 Joe Damato wrote: > > static inline void netdev_set_defer_hard_irqs(struct net_device *netdev, > > u32 defer) > > { > > + unsigned int count = max(netdev->num_rx_queues, > > + netdev->num_tx_queues); > > struct napi_struct *napi; > > + int i; > > > > WRITE_ONCE(netdev->napi_defer_hard_irqs, defer); > > list_for_each_entry(napi, &netdev->napi_list, dev_list) > > napi_set_defer_hard_irqs(napi, defer); > > + > > + if (netdev->napi_config) > > Could this ever be NULL ? Ah, good catch. I think this was an artifact from a previous revision where it could have been. But, I'll double check. In the current proposed implementation, however, I don't think it can be NULL as it is always allocated.