From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: * X-Spam-Status: No, score=1.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,PDS_TONAME_EQ_TOLOCAL_SHORT, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CD7DC55186 for ; Wed, 22 Apr 2020 08:13:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F10C20575 for ; Wed, 22 Apr 2020 08:13:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b="Khxa1aJg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726002AbgDVINy (ORCPT ); Wed, 22 Apr 2020 04:13:54 -0400 Received: from st43p00im-ztdg10073201.me.com ([17.58.63.177]:42511 "EHLO st43p00im-ztdg10073201.me.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725786AbgDVINx (ORCPT ); Wed, 22 Apr 2020 04:13:53 -0400 X-Greylist: delayed 567 seconds by postgrey-1.27 at vger.kernel.org; Wed, 22 Apr 2020 04:13:53 EDT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=icloud.com; s=1a1hai; t=1587542666; bh=IlRFzj7EEheBdI/Nmh4RvdJl0iS2iiGE0xw/RqanQy0=; h=From:Content-Type:Subject:Message-Id:Date:To; b=Khxa1aJglTchXVFm+QDWI4kAA9PVSOGv3Cj7n2twpz/tFamu3ioj/+hQseAuCR149 BdMlqSfrplUHz71BaDz6jLvVoIBkj0VdN9ISG4Met1MO6tE8cqXgupgLqo2P2hDA03 Qs/1JyR9eOp6ZyVmvQ/kdKoVB8KK5o/ceYhPUxB3xcbuufSLdd2NE2HYaM4Q9I2jRG KWoX8fxxd//jvi+m/1P+3ls5U+82XUDUqYuAGisBxSG13BnMEMSlqB+U2dOoCk+PzI wM6KkA7r2CsbcsE8JS4C3WZ/9dlb5BtZaFxJ+citA/Otfqat1xiWuPyb4EIeqtlXNQ ozLyKS5/IIOIQ== Received: from [192.168.0.102] (athedsl-4502887.home.otenet.gr [94.71.161.111]) by st43p00im-ztdg10073201.me.com (Postfix) with ESMTPSA id E1468221B5C for ; Wed, 22 Apr 2020 08:04:25 +0000 (UTC) From: Mark Papadakis Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Subject: Feature Request: SQE's flag for when you are not interested in the op.result Message-Id: <233BE31C-B811-4715-97B6-7E3F965A5137@icloud.com> Date: Wed, 22 Apr 2020 11:04:22 +0300 To: io-uring X-Mailer: Apple Mail (2.3608.80.23.2.2) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-22_02:2020-04-21,2020-04-22 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 mlxscore=0 mlxlogscore=412 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-2002250000 definitions=main-2004220066 Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org When e.g manipulating epoll state via its FD, most of the time you = don=E2=80=99t care wether e.g EPOLL_CTL_DEL succeeds or fails, or you = know that it will =E2=80=9Cnever=E2=80=9D fail. In such cases maybe it = =E2=80=98d be beneficial to support another IOSQE flag which, when set, = would instruct the io_uring to not include a matching CQE for that SQE = when processed. It=E2=80=99s not a big deal, per se, but it would probably help somewhat = with performance. @markpapadakis