From nobody Sat Feb 7 15:26:41 2026 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 6086C13AF0 for ; Tue, 6 Feb 2024 19:00:31 +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=1707246035; cv=none; b=ATIGXjB59qklynLx61vZGzmr2C0xq8zwKj1/Te+iiyHixB36p7qkOw+90j23xETxHlLzSNtn1CHBKxNoqZMBMGtuKp11MmAjbVuImeiIWIa7EF5ZHil7w+7nz+2NvGRYd427Hkkx4VZYZpBv5sS0V6YN6O/kLoajw0qBKuAPkEg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707246035; c=relaxed/simple; bh=BYgVLfv6v/ttWx32QuJAxOjLWrclNlzBJvovbd6xDjw=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=XcoQstIpi4mpYM40W8c68ZyQ9EWZ0udyaQ4l4B/JahHafX11cb1s3fE5rH4DP3/Cz6Wf4IlVA7FEikHwO5/cBcF9r5Mf7HPeGpbhDkvowza/+S7CQsYgCtRUhgUKEX+/RDDBaF4xn3RqSjN3hjtn60L9qBHLDBng5skISEwZdrQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none 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=Tii4fEL6; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none 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="Tii4fEL6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1707246030; 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: references:references; bh=Ra7EGxeWV8AGneO4cyp0zFD1CrKmCahpgLqv1cR4INo=; b=Tii4fEL6HSrqbjLiWgNqB/TZEV5g56FfItQFZ2eaBFJ/q0ZK9DW8ekXUPcuyC60X79Tg0Y lQbJrvawTXHVq6NGrFAGvShmTH+gSb2NZEPyzvEouUrzS/6lsFPRLzz9K7MEdGcC0NKWu0 w4DT2MRQzkGofzUbgfnFVFIho+iDCks= 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-54-dMpKcn1bNXyBXxUWz-pMEA-1; Tue, 06 Feb 2024 14:00:26 -0500 X-MC-Unique: dMpKcn1bNXyBXxUWz-pMEA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (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 5D0933CBDF69; Tue, 6 Feb 2024 19:00:25 +0000 (UTC) Received: from tpad.localdomain (unknown [10.96.133.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1DE8F492BC7; Tue, 6 Feb 2024 19:00:25 +0000 (UTC) Received: by tpad.localdomain (Postfix, from userid 1000) id 25B48401E119E; Tue, 6 Feb 2024 15:58:07 -0300 (-03) Message-ID: <20240206185709.928420669@redhat.com> User-Agent: quilt/0.67 Date: Tue, 06 Feb 2024 15:49:15 -0300 From: Marcelo Tosatti To: linux-kernel@vger.kernel.org Cc: Daniel Bristot de Oliveira , Juri Lelli , Valentin Schneider , Frederic Weisbecker , Leonardo Bras , Peter Zijlstra , Thomas Gleixner , Marcelo Tosatti Subject: [patch 04/12] clockevent unbind: use smp_call_func_single_fail References: <20240206184911.248214633@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Convert clockevents_unbind from smp_call_function_single to smp_call_func_single_fail, which will fail in case the target CPU is tagged as block interference CPU. Signed-off-by: Marcelo Tosatti Index: linux-isolation/kernel/time/clockevents.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-isolation.orig/kernel/time/clockevents.c +++ linux-isolation/kernel/time/clockevents.c @@ -13,6 +13,7 @@ #include #include #include +#include =20 #include "tick-internal.h" =20 @@ -416,9 +417,14 @@ static void __clockevents_unbind(void *a */ static int clockevents_unbind(struct clock_event_device *ced, int cpu) { + int ret, idx; struct ce_unbind cu =3D { .ce =3D ced, .res =3D -ENODEV }; =20 - smp_call_function_single(cpu, __clockevents_unbind, &cu, 1); + idx =3D block_interf_srcu_read_lock(); + ret =3D smp_call_function_single_fail(cpu, __clockevents_unbind, &cu, 1); + block_interf_srcu_read_unlock(idx); + if (ret) + return ret; return cu.res; }