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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 F2734C433B4 for ; Mon, 5 Apr 2021 23:10:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B15C061380 for ; Mon, 5 Apr 2021 23:10:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238588AbhDEXKq (ORCPT ); Mon, 5 Apr 2021 19:10:46 -0400 Received: from mx2.suse.de ([195.135.220.15]:38338 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231488AbhDEXKl (ORCPT ); Mon, 5 Apr 2021 19:10:41 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 218F4B10B; Mon, 5 Apr 2021 23:10:33 +0000 (UTC) From: Davidlohr Bueso To: akpm@linux-foundation.org Cc: jbaron@akamai.com, rpenyaev@suse.de, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, dave@stgolabs.net Subject: [PATCH 0/2] fs/epoll: restore user-visible behavior upon event ready Date: Mon, 5 Apr 2021 16:10:23 -0700 Message-Id: <20210405231025.33829-1-dave@stgolabs.net> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This series tries to address a change in user visible behavior, reported in: https://bugzilla.kernel.org/show_bug.cgi?id=208943 Epoll does not report an event to all the threads running epoll_wait() on the same epoll descriptor. Unsurprisingly, this was bisected back to 339ddb53d373 (fs/epoll: remove unnecessary wakeups of nested epoll), which has had various problems in the past, beyond only nested epoll usage. Thanks! Davidlohr Bueso (2): kselftest: introduce new epoll test case fs/epoll: restore waking from ep_done_scan() fs/eventpoll.c | 6 +++ .../filesystems/epoll/epoll_wakeup_test.c | 44 +++++++++++++++++++ 2 files changed, 50 insertions(+) -- 2.26.2