From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (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 1117717A2E5 for ; Thu, 27 Mar 2025 18:56:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743101792; cv=none; b=qm4a7qBm3YK4JZaA+KBfPbuPGxkbOnSAXZA6cJhsKJIuyMV8pYtZdnURQCqTk7oITot6NStRtSuqWm/ebScLPcDXvjwgtv7VTuuevYks4imjaywCwx4fdZr3Tf4Wh+xXqiykr7ufOy+5oQedYcnxRUN/IPFgR1UiRDYyRKXiICw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743101792; c=relaxed/simple; bh=NApNX0GLTCtTtLGZCrP3NkAClNc+Nn3/NIIxphDYeTs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Z4Iq0Df6I9dYeO01iAGECrDUZhECj74cxdhw01X4IkK75IAN3B/ZPwxxibS4hGI7wFltTRlDgXq2HpkvFepxztEH8vBRYCm3tjT0UR3iJ37W0sLv2tFnbg/8MP8UHAYiPEb8gLxZPOhcTUt2hQH/80QKZk87jNW/fA9R9C/UssU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=B+cCn526; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="B+cCn526" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-2240b4de12bso39770525ad.2 for ; Thu, 27 Mar 2025 11:56:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1743101790; x=1743706590; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=NApNX0GLTCtTtLGZCrP3NkAClNc+Nn3/NIIxphDYeTs=; b=B+cCn526Td0+3SZRtKVdzt3jj3vpZ73C5OZ1jb8/q34nAaHGIsr8A2jMqq+dAvlDXD 7IOTIGj74x6CKD1NWjIe1pnJwcE/iwbM0HGgwysK/+5gn90zE9ocMOpkhUxSoiT134BE MYVsEKOHY8BpY9kWzY/y5zICbHVoVy/EboUZPRXVHXgBQUPEtjE1zFRIVA0r/ozAgN7R DclmRA2ueWdTyYUC4bAfX7xsZTbSECVuOkudHzgNfbM7CQ279g4GjqAelHO4bStbx6CP kjz5KaijLbVUoYb6NXPVneZkb7ECOqimjSIx9rez+2pJdFvPDCH+vZVSBGWrjnxstNri wZ6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743101790; x=1743706590; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=NApNX0GLTCtTtLGZCrP3NkAClNc+Nn3/NIIxphDYeTs=; b=KAwAJrkP7CHr9psJMiBcHCqniW1xr3xYFrv9vfi0FfgBhaWltk5SerPZ84E6DSA1qB 0wrWFy/JHwd+FyCpn0zGZwexu3EmBV6y80XC2FJgTSo76uaDqiqtwPIqDm0UvXKfnmsx ykZs1JqKlsTTxnZiIGnQinsSht24Y/YGChuKm9geYK6wU+rYWYzAY7GKTwm5Sfw4qcmI IWhbQWHibZ8xMWFL9KfNO7XcMLAtdccq7rGNP6f8V9v0Q5ksFkm3F4iWcty3WyReO+Ed YZ9nDDAQBr51cvsaSby8jTCNH2YypWmpu/48tLSMHg9nKiyEdS/NtGqJBmaTJ8LfO/Kz yZ+w== X-Forwarded-Encrypted: i=1; AJvYcCXMJFdqFWqKof1jB8lNfcpuP7MhDCkrCvE0ERjImyjA2RW/FVO7RhE8rxlvyxjdE+gVKcphEfCA1cs=@vger.kernel.org X-Gm-Message-State: AOJu0YwRXi3Dmz3KIBX5VUjHlVcz3VWa0wNO7Ey7tWj+26tpALCrkCeG t6VSVBEKRS+7IVYnZ6b+NTV9UZ/DkSLBcOy82JlbVOH9/e8BsBd9AS379DSlKIO7gbK752VJaYl Y X-Gm-Gg: ASbGncvxnN/3Z1VdUmQNhSBrIrNWyOlJHCdKixkYfRLZjezzT5qbYI8LH9H+dX7o7RE KNbx4NPEAV2QC+rIaXRPDapkSXz/ry0ZLf5ycZTHgnzCf8pw2P8YA7hfUxZrDgU3hYhpjHalZ5m DPkHAywY4FpJVX0NAIPG/ivZUpGQLpi4KVxrjqpNwM54Q0wEgOyLTZ5knhxF9Hnxqxl/09c+93E yaB1/0XTNcroGe+ku2ZhdhwAvNcYNO5a9aBXzWq3aOjqJZTZZzV19ju5+3jqvgMtr1PyZ5q3DRW TUnM+jyQKJNBY6z+VXL5IbhINjAdIVl/V1k928dx8XGyY4lNfL0v/7ryELZLoJAH7S/ZICnzZ/w K X-Google-Smtp-Source: AGHT+IGCpIDMCTNO0zjrjz0mOOh7QmyVHnmtYl4M+loQ6kezARsOXQry7QMc8iGjESsssOBa6P/Hkg== X-Received: by 2002:a17:903:1cb:b0:223:f928:4553 with SMTP id d9443c01a7336-228049582b6mr78496805ad.44.1743101789928; Thu, 27 Mar 2025 11:56:29 -0700 (PDT) Received: from google.com ([2a00:79e0:2e52:7:61f5:481b:ce69:3d3b]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-739710a1ce4sm170113b3a.131.2025.03.27.11.56.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Mar 2025 11:56:29 -0700 (PDT) Date: Thu, 27 Mar 2025 11:56:24 -0700 From: Kevin Krakauer To: Dave Jiang Cc: Vinicius Costa Gomes , dmaengine@vger.kernel.org Subject: Re: idxd: shared workqueues and dmaengine Message-ID: References: <3a28b0a6-3c7c-43b9-a592-111692d3c1bf@intel.com> Precedence: bulk X-Mailing-List: dmaengine@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: <3a28b0a6-3c7c-43b9-a592-111692d3c1bf@intel.com> On Wed, Mar 26, 2025 at 05:15:37PM -0700, Dave Jiang wrote: > So I think maybe a new sysfs attribute can be added to wq to allow the user to choose whether to make the channel DMA_PRIVATE or not. By default it can be set to DMA_PRIVATE to keep legacy behavior. I think that should solve the issue you are encountering? Yep, that would do it. Thanks for helping me understand -- I was wondering whether I was missing something. Easy for me to workaround for now, or maybe I'll just add the sysfs attribute and send it to the list. Thanks!