From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f171.google.com (mail-qt1-f171.google.com [209.85.160.171]) (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 6CDD72E6CBE for ; Thu, 9 Oct 2025 14:17:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760019432; cv=none; b=rFY8WOi5WZF+9alqH0iBDIr1eknyAcDy9rcQTgy9V1s79I1tS9RFfn/9yuFzjSsFd6N9IMj79o9MZK2ts8cafi7sFPmmvYegA+61owDwDJomV38A1vSOpz8gjUokkiomvFLRjXYNnz0CC1q1eULxnPU8jQIEtOaWqhIndD8U2K8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760019432; c=relaxed/simple; bh=7Le//TLbRQX2OcIE7gej9WwJJwT4QWsdnDPQ1EXhgv0=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=ocqh+RXrS4dviv0zzmabois8081h23QWPtB56/kYsBFplci/YmybRTdKDp0IsRCFEa/zrh3dzDY8ZJ0QxBNN1jy/LEOMLC2vjMrZrM2YEOC9NIbXbujBO1LjsPnnHFjHlKLiZqqyR5mj/G6XhJ6p9hkoJIKoygPba72TFTrMh54= 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=bOXf8qsu; arc=none smtp.client-ip=209.85.160.171 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="bOXf8qsu" Received: by mail-qt1-f171.google.com with SMTP id d75a77b69052e-4e4a24228c4so8349491cf.1 for ; Thu, 09 Oct 2025 07:17:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; t=1760019428; x=1760624228; 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=kw875aKjiXn7LHzRQlkKAsSNQqYG1Fwo0TZ4KpBkKHs=; b=bOXf8qsucETMDyQXSDfTecS6jYTbrlr1OlYjxw7n4FpnIvfm6g8Ih1b5D7M8ygPF3E UHYWwgId/pbTs2xirXAEav50Kktw3OASidHx5Qnuy1ZCkmfWPLNp6qc85/u1AEpeqMAT pUCkUMaj2OqBHQA1dMtVkJ22Yl+55I/RMHTWs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760019428; x=1760624228; 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=kw875aKjiXn7LHzRQlkKAsSNQqYG1Fwo0TZ4KpBkKHs=; b=srCFrwrZBY+o3bI5tIGD6sRLUVGtwbHTiQ0N5++nak+3UrWgpouIggkn8I6i8R6ZQy ik/ve7nasV2l+vkqSL2y+BRSHkrxBK5GL1V0rR4fwDxoG399NMfygSZKLTEpaDdcHZlZ iWF+rgrk2SbRWCDdleX1nFzMla/VXCoWOZfB1hpgASptEu7Bhfoulhi5Ph7eRMDJipH/ Ub7F8Ntk1rKQ4lX+95HwqkE6TdejQdnW9XEkYQ5dquHkXCfRlGzDEXsBHAyHbI7kzRfI uutWOfXMbhfSILBQ0Prb9x4J99YlrNSLMCMDuV0UjKw8+rLIx42OGuuom2TZTHQtPJzn eC4A== X-Gm-Message-State: AOJu0YwG1+slhfztzO356NC8ko3aL5JceLFk/RgDXxNQVTPhOyDEmOkM poCGN9j+N/Ouq9RM+WSbjbkIzS5fnG9JwehKgqjz/IEZhpOqiOs83DPYmsqJuJzH9visqwM0DHl aKKs6SmG4Lm5leiqAEW4mJt3vuCGcdKWNSdrEsQjujw== X-Gm-Gg: ASbGncs1FFhmHquQxo4SSp/XrAX1creo0JQAXvEJy/OGC7gMOE7IGY+zMas+VLs663o 2BNz/tfsSOYHf2DNN9A4EJ8bP2oMdHEuhC242vFBhS0KPJAEOLEl7pbRHXbD81mcscIyDlaLmLX xHcywfk2sVOVPFXuw+CUO4pJF+jz4pkN0nY0ldfFP85sqezVDk1BjD/+siXzsJnxOkQ5MF1J57S yaE6DPLO9obWtw+7NAW21xzYkBI0QYpWeaFRYjYqOttutUd5kZougZCVjxhAkOVVfnGF0NtzEo= X-Google-Smtp-Source: AGHT+IFmT6ugu6bnN9+OoaWf28wEKFrDJaHd44KEAiGRCLJ7v4Pfwz3ZscJOCq/fdrEgYZKhQ8kPGWeTIZvIV2z4RfM= X-Received: by 2002:a05:622a:4ce:b0:4b9:d7c2:756a with SMTP id d75a77b69052e-4e6ead709e5mr105480261cf.77.1760019427791; Thu, 09 Oct 2025 07:17:07 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20251008204133.2781356-1-joannelkoong@gmail.com> In-Reply-To: <20251008204133.2781356-1-joannelkoong@gmail.com> From: Miklos Szeredi Date: Thu, 9 Oct 2025 16:16:56 +0200 X-Gm-Features: AS18NWCdFvnxq3uSxtfnPEwEWrDvj2PIQDcMC5IKQcEWCkEbUorjhM80YTITMlA Message-ID: Subject: Re: [PATCH] fuse: disable default bdi strictlimiting To: Joanne Koong Cc: linux-fsdevel@vger.kernel.org, kernel-team@meta.com Content-Type: text/plain; charset="UTF-8" On Wed, 8 Oct 2025 at 22:42, Joanne Koong wrote: > Since fuse now uses proper writeback accounting without temporary pages, > strictlimiting is no longer needed. Additionally, for fuse large folio > buffered writes, strictlimiting is overly conservative and causes > suboptimal performance due to excessive IO throttling. I don't quite get this part. Is this a fuse specific limitation of stritlimit vs. large folios? Or is it the case that other filesystems are also affected, but strictlimit is never used outside of fuse? > Administrators can still enable strictlimiting for specific fuse servers > via /sys/class/bdi/*/strict_limit. If needed in the future, What's the issue with doing the opposite: leaving strictlimit the default and disabling strictlimit for specific servers? Thanks, Miklos