From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f179.google.com (mail-qk1-f179.google.com [209.85.222.179]) (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 114C830217F for ; Tue, 14 Oct 2025 16:10:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760458261; cv=none; b=SXr7DcIOqYdPHYum1LCCE+Wd+HWkpz0/vKKchKjtZ/NseXPA7jpgPF7HU7ncD7jcQM8H/O2kcLJ2zzN5o65gxDwsflrqhDwnN9IFdIEE9F8gRBfS6TFt5AeibPFK41O+63ODOMe+P1c1+OKOlCDOzkaaNQ+1qYV41KJD3gRB2/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760458261; c=relaxed/simple; bh=V/DlGFRm8c+yTAONErW1Wi9DHbAGb76Wu6pjxTlj1+Q=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=IZjl8MOGF7HJD7TI00QaPCQCWQXTQbZ3nYbysSEvq1MEwpsAp7C8uYx9obtSbe7zsB0GpBZr3sO/HyyFbhHVKz1zJmRqdaQnt0/DhQYcISXjOgSd3s3/fPEXCGmCBtUPtBonCQ11XQLPcLFPtm+mV1SYzQzgnGMBDWCwMRA9cYk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=szeredi.hu; spf=pass smtp.mailfrom=szeredi.hu; dkim=pass (1024-bit key) header.d=szeredi.hu header.i=@szeredi.hu header.b=gN3+XUfN; arc=none smtp.client-ip=209.85.222.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=szeredi.hu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=szeredi.hu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=szeredi.hu header.i=@szeredi.hu header.b="gN3+XUfN" Received: by mail-qk1-f179.google.com with SMTP id af79cd13be357-863fa984ef5so920435885a.3 for ; Tue, 14 Oct 2025 09:10:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; t=1760458258; x=1761063058; darn=vger.kernel.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=V/DlGFRm8c+yTAONErW1Wi9DHbAGb76Wu6pjxTlj1+Q=; b=gN3+XUfNl5I+bNisuheUReVqm65hJFnW6xxQP+JdUGFN+EF7bWcJUVmZZ3KQep3rPs Y6GupbvMVOwuTq4TkAQ0a4SYLAtNs6GYP4HJxi3h7SsckIRqpY9iEWuU/QIhmIxoOqQZ As6yVfZQU6YbehwvQbAq904tCpzeHsYsrfzIk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760458258; x=1761063058; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=V/DlGFRm8c+yTAONErW1Wi9DHbAGb76Wu6pjxTlj1+Q=; b=COKQAG+q+vsfs9kjtQcgv9N8F4HBtPxj8FT3Q27Zzc01TCkKdkcXfqLS48njdeSIFT 8fksei9/QOlUNvLqyhkGEL7D5XE7PfeCbzhiOQ5t/qeRuzg23e100GZ00O6T+SjTKPVX 2t3nEQHi1QQI2IeadC/BRx+a0skzUAhlTmixYIILXn7HWAFglauPg7/bdFR4O+EOiAEL qXKsV+0xR4/B2qVZt33fuZCIhs/Hyzf6innwrNBto1iD/2/O6DphOLsdl+X+m1rPX7sS 9KyEfbil3Rcv9vuIWjAHaLzGGVOANIXSEjxsBzHqL3mqB9K+VDNhRxzv8JqRH2ivVVoq Tg9A== X-Forwarded-Encrypted: i=1; AJvYcCWI0Xbgn2UOR/+2SYULmiQd5pShxFo/WWzMNRV4WmxijrCHJ92MuRLSJuTTd/fEUdlZn7vqKheJuLbLtjs0@vger.kernel.org X-Gm-Message-State: AOJu0Yy+ps9JiU9IBTFqf8qbswfdNg+AEkU4StiuBFif/8hQVmQSFa1n vNUZy/lUmhRzctvzDkYW/utL+dEOFvXxDZ0+OYScLTP1eUcbg1IkM05KBwtt4BC9/UtabIS7v8S ylGaAQ3opxNJrZfExeR5V551mDH8fDO/IDdEe1bwbLw== X-Gm-Gg: ASbGncvjHXbW8FkVpzZgUmklcLLGbhKH1tBPFjGAc8ESvwAdXZlNajQMB4C3ZPn88yd kgp8fxLkar4RN/mn0ekYj3+iS9f/QrnM6DQPxEqjGTo/v0i9vBMbXZmuBlxfQmbQgt3pCw4lIAM BAFzwn3Bbk7pwCI0XNWadTq/QoqJww1M9OCpBR6mA6q2Sg5tCQeHvHmdfJbyunt6pYdK1zrpUUl JCrvGU4dbSBC+6A6KqG1yQLWU+QnLcwBzPegViu1n81wIjmBy+OGJH5jEQ1/ejsiOtrtA== X-Google-Smtp-Source: AGHT+IFQRjAKAJYbp6V1WiZeFCyECjXuO5jrrPa49DgUlI1WAPf13+vaPEkcaT2yeshZtbmjCqkb6pcUiXEcfb2su+M= X-Received: by 2002:a05:622a:11d5:b0:4e2:f1b3:3462 with SMTP id d75a77b69052e-4e6ead4c89cmr348585611cf.52.1760458257727; Tue, 14 Oct 2025 09:10:57 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20251009110623.3115511-1-giveme.gulu@gmail.com> In-Reply-To: From: Miklos Szeredi Date: Tue, 14 Oct 2025 18:10:45 +0200 X-Gm-Features: AS18NWAdgN8KhodM1ygh5h7LAeZnHjtur6SOKA5u8RJBQMjsBZqEVkdui4mizyA Message-ID: Subject: Re: [PATCH 5.15] fuse: Fix race condition in writethrough path A race To: Brian Foster Cc: lu gu , Joanne Koong , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Bernd Schubert Content-Type: text/plain; charset="UTF-8" On Tue, 14 Oct 2025 at 15:57, Brian Foster wrote: > But TBH, if the writeback thing or something similarly simple works for > resolving the immediate bug, I wouldnt worry too much about it > until/unless there are userspace fs' explicitly looking for that sort of > behavior. Just my .02. Agreed. I just feel it unfortunate that this is default in libfuse and so many filesystems will have auto_inval_data enabled which don't even need it, and some mixed read-write workloads suffering badly as a consequence. Thanks, Miklos