From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f182.google.com (mail-pg1-f182.google.com [209.85.215.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E6C314F9C5 for ; Tue, 9 Jul 2024 22:31:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720564286; cv=none; b=pHEb8omiG/dfNv2BecqmD31imFhz0IHwTMsVdsBam61qUUcx2OaCVsBBiNc5BB0vBFtGehiig9v0OcV65izZpcIXEx7r0JA3/WL0KvqAaH1gGyuR0d4zHECoMphLyXqeaMbaaocTqocJ+pyc+1AS7n2hA5SWUh0SBDyvMseOCx0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720564286; c=relaxed/simple; bh=I7gSWmVV4vXFUCoNUrEOc38mqTWFBsiO3LkxG+qn4Wk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=UYFr3e0gQsSk/tbeesIsgWg8qAvh+KDBObKY+uRtPSYtZB2GoHfAQtBln67dq4rWmpRGoHoCi5eEJ1U8ABMU3a/SDV9DDNHle++L3DhBGCq7PD4Tep6n+5xzDWeNl5JcsmFF2UKv68WN4b8wmj68xBIZvXIfwQqcx0T7p3PVjFA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=PcPA1k1A; arc=none smtp.client-ip=209.85.215.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PcPA1k1A" Received: by mail-pg1-f182.google.com with SMTP id 41be03b00d2f7-71871d5e087so3931995a12.1 for ; Tue, 09 Jul 2024 15:31:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1720564284; x=1721169084; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=Bk2gPv74LRKikOK4OISmF2vsurbf0ItnRmMMelfOtc8=; b=PcPA1k1AKOiIIMtd8z5ZVPhtCC26RyJPepBMnPV8QguJNx06Pqg4/XB9HeViTTR/JV FDEUYySE4s8DxvQUi/cLi7KP24RHjWllMpVvJ3V5oCDZaZ+h1Y8Xte5dE/RQw6k8JELC GMBWUmECJXlJ5Q09QzQNCEqEnsql/lA8LBnvyXqjOE9mc24zKaz6QxnGpYrBP6JPyTXG lqpeVPc5BM1UZI/kvu1eaGXyBmwhERYfNpGIqkKsy2JxiGNwrxzorG1ePXv2udvvlETo Knicmg7JjtAdLDNeEv37y8Tu6AT4tX5ZMYaKh6fp2sH45AxJv33XHrjB2e0C7+sR4A25 H+Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720564284; x=1721169084; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Bk2gPv74LRKikOK4OISmF2vsurbf0ItnRmMMelfOtc8=; b=mPnkZ3VaqypF8CoVA5xxZz1YoDAGXyyGutzOlhp36qyGApjPkLOv5Bk1ctcHaZN3mQ fMeiq5gzKTIIKuK0dQeRAU5WKXiEu3zUH5goQaEU0IjkMDrY/Q/gkk83wGA9zCuOyvp9 U6Pj4Ow/YzBTPB2LUOAUypQSB9jcZZi/8l8Udb2broIqMP4dMwV0YyEtfSIF946SPu3D IMfB/n5TrG2YsoCWwhU2r3giLT7/eyvs17ukzald/6EUpn53A8kVAifmvd7Vzzd6iifN rgppklLeS1FCcdX3W43HR2IRKXSLShpQavjrqNoxTltZYBahvZvdDqftQ3rEKUIIU3RX bjRQ== X-Gm-Message-State: AOJu0Yz9toZQBNiAm4Knfgqb57G4PlDpmi6YYaGs4MEWTH6ktHydheQV FSjLaqxzgdzPgqZVhDDHa+Q8nDjfrzPRrDDFEQZB1iAtSyieqedo7sNL2Q== X-Google-Smtp-Source: AGHT+IFPXXUN5eOa5yAAQ9Ixj1XAgbGOHWWRt7sGALkqAIcrCkqIiPbdf1aCItnofjRXq7f2HHfUFQ== X-Received: by 2002:a05:6a20:da95:b0:1be:c057:ea12 with SMTP id adf61e73a8af0-1c29822114dmr4120753637.14.1720564283566; Tue, 09 Jul 2024 15:31:23 -0700 (PDT) Received: from localhost (dhcp-141-239-149-160.hawaiiantel.net. [141.239.149.160]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70b438c0a94sm2362953b3a.62.2024.07.09.15.31.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jul 2024 15:31:23 -0700 (PDT) Sender: Tejun Heo Date: Tue, 9 Jul 2024 12:31:21 -1000 From: Tejun Heo To: void@manifault.com Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, schatzberg.dan@gmail.com Subject: Re: [PATCHSET sched_ext/for-6.11] sched_ext: Fix scx_bpf_reenqueue_local() Message-ID: References: <20240709211001.1198145-1-tj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240709211001.1198145-1-tj@kernel.org> On Tue, Jul 09, 2024 at 11:09:41AM -1000, Tejun Heo wrote: > Fix scx_bpf_reenqueue_local()'s misbehaviors in two cases: > > - when SCX_ENQ_HEAD is used to dispatch a re-enqueued task back to the same > local DSQ. > > - when the CPU is being preempted by stop_task for task migration. > > This patchset contains the following two patches: > > 0001-sched_ext-Reimplement-scx_bpf_reenqueue_local.patch > 0002-sched_ext-Make-scx_bpf_reenqueue_local-skip-tasks-th.patch Applied to sched_ext/for-6.11. Thanks. -- tejun