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[24.6.151.244]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-730aad5535fsm1205630b3a.51.2025.02.10.14.22.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2025 14:22:07 -0800 (PST) Date: Mon, 10 Feb 2025 14:22:05 -0800 From: Joe Damato To: Kurt Kanzenbach , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Sebastian Andrzej Siewior , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Message-ID: Mail-Followup-To: Joe Damato , Kurt Kanzenbach , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Sebastian Andrzej Siewior , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org References: <20250210-igb_irq-v1-0-bde078cdb9df@linutronix.de> <20250210-igb_irq-v1-1-bde078cdb9df@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastly.com; s=google; t=1739226128; x=1739830928; darn=lists.osuosl.org; h=in-reply-to:content-disposition:mime-version:references :mail-followup-to:message-id:subject:to:from:date:from:to:cc:subject :date:message-id:reply-to; bh=fbq5bdkh5KGZmV4lXmeUGC15WHyvC1UK0TIUDiJsUQ0=; b=NqJrh/6piyebQVRreFeChvVTYqXzI01CaNKZ4igwQWtzTxIDHnFHSdhRYIAhbhN56R z25mkrhtlUKZJI/ZecY+9kyGNquDYn3FYwF0N48elj8jl3i7Z0xGWewbNeWCB2UcUL5H kkZFxQ1K6a8KFzy3h9QaW05KTvM8SeWwukn6U= X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dmarc=pass (p=reject dis=none) header.from=fastly.com X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dkim=pass (1024-bit key, unprotected) header.d=fastly.com header.i=@fastly.com header.a=rsa-sha256 header.s=google header.b=NqJrh/6p Subject: Re: [Intel-wired-lan] [PATCH 1/3] igb: Link IRQs to NAPI instances X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On Mon, Feb 10, 2025 at 10:25:47AM -0800, Joe Damato wrote: > On Mon, Feb 10, 2025 at 10:19:35AM +0100, Kurt Kanzenbach wrote: > > Link IRQs to NAPI instances via netdev-genl API. This allows users to query > > that information via netlink: > > > > |$ ./tools/net/ynl/pyynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > > | --dump napi-get --json='{"ifindex": 2}' > > |[{'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8204, > > | 'ifindex': 2, > > | 'irq': 127, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8203, > > | 'ifindex': 2, > > | 'irq': 126, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8202, > > | 'ifindex': 2, > > | 'irq': 125, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8201, > > | 'ifindex': 2, > > | 'irq': 124, > > | 'irq-suspend-timeout': 0}] > > |$ cat /proc/interrupts | grep enp2s0 > > |123: 0 1 IR-PCI-MSIX-0000:02:00.0 0-edge enp2s0 > > |124: 0 7 IR-PCI-MSIX-0000:02:00.0 1-edge enp2s0-TxRx-0 > > |125: 0 0 IR-PCI-MSIX-0000:02:00.0 2-edge enp2s0-TxRx-1 > > |126: 0 5 IR-PCI-MSIX-0000:02:00.0 3-edge enp2s0-TxRx-2 > > |127: 0 0 IR-PCI-MSIX-0000:02:00.0 4-edge enp2s0-TxRx-3 > > > > Signed-off-by: Kurt Kanzenbach > > --- > > drivers/net/ethernet/intel/igb/igb_main.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c > > index d368b753a4675d01b5dfa50dee4cd218e6a5e14b..d4128d19cc08f62f95682069bb5ed9b8bbbf10cb 100644 > > --- a/drivers/net/ethernet/intel/igb/igb_main.c > > +++ b/drivers/net/ethernet/intel/igb/igb_main.c > > @@ -947,6 +947,9 @@ static int igb_request_msix(struct igb_adapter *adapter) > > q_vector); > > if (err) > > goto err_free; > > + > > + netif_napi_set_irq(&q_vector->napi, > > + adapter->msix_entries[vector].vector); > > } > > As far as I can tell, all paths that lead here hold RTNL: A nit on my own comment, netif_napi_set_irq doesn't ASSERT_RTNL (but does hold net_device->lock); its the other functions in patch 2 that ASSERT_RTNL. My reviewed-by stands; just wanted to correct myself. 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[24.6.151.244]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-730aad5535fsm1205630b3a.51.2025.02.10.14.22.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2025 14:22:07 -0800 (PST) Date: Mon, 10 Feb 2025 14:22:05 -0800 From: Joe Damato To: Kurt Kanzenbach , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Sebastian Andrzej Siewior , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org Subject: Re: [PATCH 1/3] igb: Link IRQs to NAPI instances Message-ID: Mail-Followup-To: Joe Damato , Kurt Kanzenbach , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Sebastian Andrzej Siewior , intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org References: <20250210-igb_irq-v1-0-bde078cdb9df@linutronix.de> <20250210-igb_irq-v1-1-bde078cdb9df@linutronix.de> Precedence: bulk X-Mailing-List: netdev@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: On Mon, Feb 10, 2025 at 10:25:47AM -0800, Joe Damato wrote: > On Mon, Feb 10, 2025 at 10:19:35AM +0100, Kurt Kanzenbach wrote: > > Link IRQs to NAPI instances via netdev-genl API. This allows users to query > > that information via netlink: > > > > |$ ./tools/net/ynl/pyynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > > | --dump napi-get --json='{"ifindex": 2}' > > |[{'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8204, > > | 'ifindex': 2, > > | 'irq': 127, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8203, > > | 'ifindex': 2, > > | 'irq': 126, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8202, > > | 'ifindex': 2, > > | 'irq': 125, > > | 'irq-suspend-timeout': 0}, > > | {'defer-hard-irqs': 0, > > | 'gro-flush-timeout': 0, > > | 'id': 8201, > > | 'ifindex': 2, > > | 'irq': 124, > > | 'irq-suspend-timeout': 0}] > > |$ cat /proc/interrupts | grep enp2s0 > > |123: 0 1 IR-PCI-MSIX-0000:02:00.0 0-edge enp2s0 > > |124: 0 7 IR-PCI-MSIX-0000:02:00.0 1-edge enp2s0-TxRx-0 > > |125: 0 0 IR-PCI-MSIX-0000:02:00.0 2-edge enp2s0-TxRx-1 > > |126: 0 5 IR-PCI-MSIX-0000:02:00.0 3-edge enp2s0-TxRx-2 > > |127: 0 0 IR-PCI-MSIX-0000:02:00.0 4-edge enp2s0-TxRx-3 > > > > Signed-off-by: Kurt Kanzenbach > > --- > > drivers/net/ethernet/intel/igb/igb_main.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c > > index d368b753a4675d01b5dfa50dee4cd218e6a5e14b..d4128d19cc08f62f95682069bb5ed9b8bbbf10cb 100644 > > --- a/drivers/net/ethernet/intel/igb/igb_main.c > > +++ b/drivers/net/ethernet/intel/igb/igb_main.c > > @@ -947,6 +947,9 @@ static int igb_request_msix(struct igb_adapter *adapter) > > q_vector); > > if (err) > > goto err_free; > > + > > + netif_napi_set_irq(&q_vector->napi, > > + adapter->msix_entries[vector].vector); > > } > > As far as I can tell, all paths that lead here hold RTNL: A nit on my own comment, netif_napi_set_irq doesn't ASSERT_RTNL (but does hold net_device->lock); its the other functions in patch 2 that ASSERT_RTNL. My reviewed-by stands; just wanted to correct myself.