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Mon, 13 May 2024 13:12:43 +0000 (UTC) Message-ID: Date: Mon, 13 May 2024 07:12:42 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] nvme-pci: allow unmanaged interrupts To: Christoph Hellwig , Keith Busch Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, ming.lei@redhat.com, Keith Busch References: <20240510141459.3207725-1-kbusch@meta.com> <20240510141459.3207725-2-kbusch@meta.com> <20240510151047.GA10486@lst.de> Content-Language: en-US From: Bart Van Assche In-Reply-To: <20240510151047.GA10486@lst.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 5/10/24 08:10, Christoph Hellwig wrote: > On Fri, May 10, 2024 at 07:14:59AM -0700, Keith Busch wrote: >> From: Keith Busch >> >> Some people _really_ want to control their interrupt affinity. > > So let them argue why. I'd rather have a really, really, really > good argument for this crap, and I'd like to hear it from the horses > mouth. Performance can be increased by modifying the interrupt assignments carefully, especially in storage appliances that have to process a large number of network and storage interrupts. By carefully assigning interrupts the number of completions processed per interrupt can be increased and hence performance also increases. In 2014 I was working on a product that benefited from this approach. Thanks, Bart.