From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 706263857706 for ; Wed, 13 Mar 2024 17:58:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 706263857706 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 706263857706 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1710352719; cv=none; b=J3kLf2H7CnRBmZsGK0EQa/jIGgmt86OF22Hxq6OImLAVRIDAfbtWLDX2YMVIhXKeCa212TL4uVqZOf6rvmEsN7AkQ4dQoivV2CFtV7T8vqH9Js1CgYkLv1VfDh9U6BzKyMBmzVTypsrmz03cq68Xl8/HEpn7hPy0FjYchrCA0Yk= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1710352719; c=relaxed/simple; bh=l/dJXQW98BMD6wMdVWNP3PUwT5HUg2+FRqIvvEgZTnU=; h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version; b=PTspNJ9zYi0ztDcjnNZUa4Oqqjm4wZ7CCwMTFwLnqc3X0p9ikgId9ovi5pe0Mn2usmy13dizey4/a+iWvIRphQZGMvgk+E1pXz/9wNaNu6Qa0ha8Rm2x77d/zhrgBCbLaDFz93BuYgwkyXhL6jJoFWcel9GEqnZIbF9m57ktJy4= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710352718; 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=ROJYW0sziQ/k9w4/ytS+4kIdCfCVVlqSayRnBuwvTjI=; b=TO1i78LLSbuTfATKbWgAcAr6HUqR+fOxSjDWvDo7i637AmpHLGDkhYFnAhNenVK3IWa3Ys E3lw7fOxOS/jCfwJ4YMqvqPnWL2Hz31MLLn5pKCAnk6jMWKoHDC2caJkxsF60ma4WroR8J /Yj52QC/6wvKJF1i/bZpR/CqDjZc2Wg= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-385-GwGyG5V3PLWplZTS5KL3Yw-1; Wed, 13 Mar 2024 13:58:35 -0400 X-MC-Unique: GwGyG5V3PLWplZTS5KL3Yw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 9ACD03C40B54; Wed, 13 Mar 2024 17:58:35 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.73]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2560A10E47; Wed, 13 Mar 2024 17:58:35 +0000 (UTC) From: Florian Weimer To: Andreas Schwab Cc: libc-alpha@sourceware.org Subject: Re: [PATCH v2] linux: Add #include to sched_getcpu.c (bug 31479) References: <87ttlaqnxi.fsf@oldenburg.str.redhat.com> Date: Wed, 13 Mar 2024 18:58:33 +0100 In-Reply-To: (Andreas Schwab's message of "Wed, 13 Mar 2024 15:39:47 +0100") Message-ID: <87edceqaie.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-5.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: * Andreas Schwab: > On M=C3=A4r 13 2024, Florian Weimer wrote: > >> Originally, nptl/descr.h included , but we removed that >> in commit 2c6b4b272e6b4d07303af25709051c3e96288f2d ("nptl: >> Unconditionally use a 32-byte rseq area"). > > Can't this use rseq_area unconditionally? Interesting idea. It adds an extra branch for architectures which are not rseq-enabled, but they likely lack vDSO acceleration as well and hit the full system call every time, so it doesn't really matter. I'll test and send a v3, although I don't think I've got access to any !RSEQ_SIG architectures. Thanks, Florian