From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ABE5346BA0 for ; Mon, 4 Mar 2024 16:20:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709569203; cv=none; b=dZJmrFY3ESzbBcgBQpwjtHEPbh3dyqGh6MxEcIlL2hFE/AAjjRSmcgcyW6dHGz5STZBuiVl+DkHGvDMOmGMemwm7y1/oE9naEIGM6VwuRc1w9ikSpb1j0rNuR9jnK4SGoaGrrqX7BU5+1iXMLw87my0+EAmQpezuENuv6cSTdg8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709569203; c=relaxed/simple; bh=I758tjVlpgSflX7zDEXIKlU/dlj6cXvkjbHNBihfeHo=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jUeG562F+qaG+iuycPZBJb3d1AnJDnBK6CULLQkW0cUY5eyJWgmgLL/qUIWRCpLyv8+tBGijD0ZoRH7O5TsVowbqHv97fHqJVF4ucfawuG/TpKDeCmXX77tbIs089KeCHJ5+Y3LsNSNnUZ/7gUprQKB6g9/umXSLk/YQueY8eqA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZZcbND2E; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZZcbND2E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA5F4C433C7; Mon, 4 Mar 2024 16:20:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709569203; bh=I758tjVlpgSflX7zDEXIKlU/dlj6cXvkjbHNBihfeHo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=ZZcbND2EL5ZcHYQdVkyiPTjilcVezxXvbbhdlFtNjvmjh4wS7fdTdaLMN7hfL48qy O6F1aoicrTFF3J1gEpwzqBS5nnCC1ZOAybl/lqCQNME6CssUi836/41asSIPMXU+V7 gnWJk8GOI06+QFtILWawk9NcSlP9i1bkPCQhxy1Vp87/6fVWsrUqINGWq2Gw8hTPVs h44vFpUNZj0aBroB6aTFWhwBDzmKngzqkjuczhbGafxQUySxUQCBIgPpsYbdrsKHlp gXINLk3N/pVPEla7uEniMCRTcHwuDiQoeNQvpkdJ40f2rssRthAMO9KPeQsAJU+4X7 I81KdhSp3yo3g== Date: Mon, 4 Mar 2024 08:20:02 -0800 From: Jakub Kicinski To: Donald Hunter Cc: davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, jiri@resnulli.us Subject: Re: [PATCH net-next 2/4] tools: ynl: allow setting recv() size Message-ID: <20240304082002.14b3a081@kernel.org> In-Reply-To: References: <20240301230542.116823-1-kuba@kernel.org> <20240301230542.116823-3-kuba@kernel.org> <20240304065823.258dfabf@kernel.org> 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-Transfer-Encoding: 7bit On Mon, 4 Mar 2024 15:57:57 +0000 Donald Hunter wrote: > > Attributes, not messages, right? But large messages are relatively > > rare, this is to make dump use fewer syscalls. Dump can give us multiple > > message on each recv(). > > I did mean messages: That's kernel capping the allocations to 32kB, using larger allocations is "costly" / likely to fail on production systems. Technically the family can overrule that setting, and my recollection was that 128k or 64k was what iproute2 uses.. I could be wrong.