From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 65ACC345CAB for ; Fri, 8 May 2026 18:56:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778266618; cv=none; b=Z2KBWDN4a/34SbztFtz1UnTNC7hd3iGvMLWNo9ZBjEimQ0pLtN8KicFeD51NJT5brscYBlFF6pUHadBaAhiu7YzclAOW2NX/BSWN1ZIp3XWx2ZmLPG/USZO0gbr3ahTpFHHGcAIiD8u3kXTxQQto3XyvXxnsC8n/nfcF9bwXWH8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778266618; c=relaxed/simple; bh=Cach13ED73zPiICpXNRYlpotEgcVawUBhgeetNazzG4=; h=From:In-Reply-To:References:To:Cc:Subject:MIME-Version: Content-Type:Date:Message-ID; b=gDh5QGn3wTwpL5a+2lrWgtW1jTyCjyF41ZdTi/homQDBi2Fhuf2PrlPoEg7gbg9K+O0r+BIkYbo2dnLN2rggJ+U0+AEyL/6hD5GQ2grLT0Tz92B37adBchqABQ7el8Jwd+A0xBB8uWWfk/owifHXcEG84fZTY2vD5OTQr+UdlzQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=QymmCpR8; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QymmCpR8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1778266616; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vmkPjGRkulFnPfA8e1AK3LO/LMLtU89tzBUqK2/8QOs=; b=QymmCpR8yC2tgKtSBq2SLI+7SrzZ7xqvRxR2yVMMZglrOt15Zn+48A8OIhqV5ATL2gKPGp wZy8lZw7KgSKXfQJVw12vQhLr3lZywTLOOxX8xR73HMeBF2J1Yeg4Q0iC0hZ/NtGEDjgle JasYGVVq/TyDW4YPZ1ZaIDczFmM5iv0= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-360-N0qOMcncO0aGMKAlLd35XQ-1; Fri, 08 May 2026 14:56:51 -0400 X-MC-Unique: N0qOMcncO0aGMKAlLd35XQ-1 X-Mimecast-MFC-AGG-ID: N0qOMcncO0aGMKAlLd35XQ_1778266609 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id EFE3B195606F; Fri, 8 May 2026 18:56:47 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.44.48.83]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7F0C33002D2F; Fri, 8 May 2026 18:56:44 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20260508182318.GA4145640@google.com> References: <20260508182318.GA4145640@google.com> <20260428024400.123337-3-ebiggers@kernel.org> <20260428024400.123337-1-ebiggers@kernel.org> <286248.1778263325@warthog.procyon.org.uk> To: Eric Biggers Cc: dhowells@redhat.com, netdev@vger.kernel.org, linux-afs@lists.infradead.org, Marc Dionne , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Subject: Re: [PATCH net-next 2/5] net/rxrpc: Use local FCrypt-PCBC implementation 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-ID: <287475.1778266603.1@warthog.procyon.org.uk> Content-Transfer-Encoding: quoted-printable Date: Fri, 08 May 2026 19:56:43 +0100 Message-ID: <287476.1778266603@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Eric Biggers wrote: > Also I'm waiting to see if the following patch gets merged: > https://lore.kernel.org/netdev/20260502211340.446927-1-n7l8m4@u.northwes= tern.edu/ This is the favoured solution: https://lore.kernel.org/netdev/af2kdW2F1gJ9U-Gg@v4bel/ The problem with the one you mentioned is that it does a mandatory copy, e= ven when it doesn't need to, for rxgk. I can benchmark that to see what the performance impact it has. David