From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS3215 2.6.0.0/16 X-Spam-Status: No, score=-4.3 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 9BB371F8C6 for ; Mon, 30 Aug 2021 09:27:17 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 9907F385803F for ; Mon, 30 Aug 2021 09:27:16 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9907F385803F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1630315636; bh=7jJuSm1yuT8vPSu2kX05yuVp1v9Hb4MKF2xf68Jdnmk=; h=To:Subject:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=g4vRgiH+ZDT93x8Cd+N6RHAM4xoqDVp0tDfPAgn1NONZ2reYHw6/9/Dv99WITP+yi mbRjpCbyYvRR9eNLqYK5DZeyC3bajkAsOvxns0rk+y9XCH2zIhlC5pWzid7+3r3bQB IzW24jGH4M5xsKc6oCE7zpL1wjaalhELvMIs2DhE= Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by sourceware.org (Postfix) with ESMTP id 9D429385840D for ; Mon, 30 Aug 2021 09:26:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 9D429385840D Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-237-bG_cewXTNJSI-HYreIaK2A-1; Mon, 30 Aug 2021 05:26:52 -0400 X-MC-Unique: bG_cewXTNJSI-HYreIaK2A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C01E3802937; Mon, 30 Aug 2021 09:26:51 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.194.140]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E54221002391; Mon, 30 Aug 2021 09:26:50 +0000 (UTC) To: Adhemerval Zanella Subject: Re: [PATCH v2 17/19] nptl: Use tidlock when accessing TID on pthread_sigqueue References: <20210823195047.543237-1-adhemerval.zanella@linaro.org> <20210823195047.543237-18-adhemerval.zanella@linaro.org> <87eeag5ksb.fsf@oldenburg.str.redhat.com> Date: Mon, 30 Aug 2021 11:26:48 +0200 In-Reply-To: (Adhemerval Zanella's message of "Thu, 26 Aug 2021 14:49:32 -0300") Message-ID: <87pmtvs2p3.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Florian Weimer via Libc-alpha Reply-To: Florian Weimer Cc: libc-alpha@sourceware.org Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" * Adhemerval Zanella: >>> + else >>> + res = -ESRCH; >> >> We can return 0 in this case, I think. > > No sure about this, we can return 0 but it means signal won't be potentially > delivered. The thread may have already started exiting and blocked the signals when pthread_sigqueue is called. In that case, it would return 0 even though the signal is never delivered. Thanks, Florian