From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f43.google.com (mail-pj1-f43.google.com [209.85.216.43]) (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 DB5912153D4 for ; Tue, 23 Dec 2025 05:38:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766468313; cv=none; b=NxnQ2yO9VvV0rZLfUVemGPXMxEQJcHTtNEXZjh6ixw8s/52caM+CHvzUrL4kwEjbX/xifWBID+9T0+6/M+M9ybkcla39LxwuRc6E/3CFJ47V6DNZwjE+5OjOmjalf7nMaEQ5a0Yulf1dwgU2PYsEnIMbPtxcPkJBGUOGXSdJAcA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766468313; c=relaxed/simple; bh=zTV5Fl6uJEq6bikfRl+2GZKAfKdgBpPPlmOrmzDQ1Sc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=KpwCRtqu2dKmc6HVqG6bP5Kec4xqk7He0ajvg84Ayi1ZBYDyOl5Jgy5cSyRHYh+DryP9+PP6mkvrnV0e5ZiDxTDTV9G19l9SiGNFoXoT1fKZRyVX3snP8C2SUChejFaB6WaijuT2/mHdioja2ebA1J/JmqW1+lrto6fhLeMbA/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=k/39yZPJ; arc=none smtp.client-ip=209.85.216.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com 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="k/39yZPJ" Received: by mail-pj1-f43.google.com with SMTP id 98e67ed59e1d1-34c21417781so4579268a91.3 for ; Mon, 22 Dec 2025 21:38:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1766468311; x=1767073111; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=2eUzqzQcRAv7TL9i3u7rXqYthkznBqBfs67/HNYTk8I=; b=k/39yZPJRd/lUcRJkV7mXQEWc1+ntOQZ3mgr8kFI765nq8VXzciXpYKgKPQG/tmkAM owjPUkIe3CFME/oQ1dh1e+schfxGr1GebTc60fpUHpvMD21xSXHx1R6rHRmQnGi7e77b K8gWq0Odf6lE5z7xabI1OfkODM0SiBVhCyDtkdpfiQCqP28IV5iuZ3X2EFOvRV2Gg7UZ OwnNQdnzXvu1PxMtIuBAX2FJOYDAFMzk3ZDVkCoSbErCXRMukkSvcsMp9nWx55EwuwEJ 7Pdlo1cgbWzgOgds7F9Lpvihye3j+92iv8K2QF0XqTlcbb/5O/MwGRalD5ldn/b0XsSo WZGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766468311; x=1767073111; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=2eUzqzQcRAv7TL9i3u7rXqYthkznBqBfs67/HNYTk8I=; b=KnY9GT1IHdneksEb9EposMr5+St1lYLjLp+zRxnFi60GyByfbTx2YkHk5WcxS7jKKV mBSAdDkM/7Z8h6U7ZdTzC8zt9dDHJgK1yzIerb2hoee9/Ci4ozOfaioYOcojdn121Z0I AweXi11Ydl9hG3yQMfoFsolRYWMTLxlbKu30aQFcgMUOkYEe9ontMh6dRKEghw3p+c15 x6sAdEyDvSOuH26TpFnKBHUI6sLqomMYBSur4KKSprN+h4CfTdGYcIv9rPDXAwheUs4n FJ1SvP7GCCLTDgFbnGU9NMTjZl95TYf67a83SOIzA+q3YuYuEUZ2q05icW6aqoA+FuMI OEug== X-Forwarded-Encrypted: i=1; AJvYcCXLtMQwAx7cH0G4Rba2tj7Fb2oLgBH/KfJ9r7hwMpBEglY3o2IC0r7NDJPnuvFKdYbYyleNL5GlwEVSDA==@vger.kernel.org X-Gm-Message-State: AOJu0Yw9rGkJ/0YtsM/DgC8OhWuWFLiAPP0KtzUkv0Kdh6UvviHG/DZc hZDFqWNDULxHifIRqaqpudD+7IOBbrPf+N3fyJ+qty6+RCAddyKqWFTL X-Gm-Gg: AY/fxX6Fhyw6O8PXljeIFK77RdNRA1Iu8vpclPRjPQ0qxJ8g+lRW9DTSfFOXHVb4wJC dRvG4gMKfcs51nH1jT1BR8OPh0skfhqbCtL/trTgw+IzWKu1ex97DG3Ewd61AoXBjjxJCJPpudW lgAMfhhott6wzs9HppwAogsOVowac6I0awAvd6Vpb4mL7xwW/5PKvYjSROrh9RRJGBVfl/NjgXP P16tDMkBG+s/zdf6RCw0YDQUu470GvRki8UtFPhkYZpwyRRFPLvRTn1MWctSdNQhTl3gxoTAeUt g6Oa9XUlcmNgvu7zPhuH4KqCV9yWuYdVqKPAQpkkYmaMcpQRIkrB4M+CO8uVjF12YGNtzUMrCFH cX2lvIaci8k+pwljSSNRiiYVTgc1y2TZ95d99jjpE09rdNpyqYKjEJYZWMzNWzMEIsYDCshNYRC bDuWHMbPho4YkMyqcilnBWlkvXy6EXdfsKrz/y7Q1HPCR0nnndrwTvEmF9Sfg3oehrRX/CAAqPo Rw= X-Google-Smtp-Source: AGHT+IFwAZOrVWcdz0GU+cDO+t7ewKrgjzgkHtOiGD0/poJQvRMMxSdMeBecD46MhF4AsSDjM1RyIA== X-Received: by 2002:a05:7022:799:b0:119:e56b:957e with SMTP id a92af1059eb24-121722ac244mr18354800c88.3.1766468311123; Mon, 22 Dec 2025 21:38:31 -0800 (PST) Received: from ?IPV6:2600:8802:b00:9ce0:637f:5cdc:9df0:d9ab? ([2600:8802:b00:9ce0:637f:5cdc:9df0:d9ab]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1217254d369sm56187439c88.16.2025.12.22.21.38.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Dec 2025 21:38:30 -0800 (PST) Message-ID: <37febb65-038e-47a7-9a5b-3b4c2773994f@gmail.com> Date: Mon, 22 Dec 2025 21:38:29 -0800 Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 08/11] fs: add support for non-blocking timestamp updates To: Christoph Hellwig , Christian Brauner Cc: Al Viro , David Sterba , Jan Kara , Mike Marshall , Martin Brandenburg , Carlos Maiolino , Stefan Roesch , Jeff Layton , linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, gfs2@lists.linux.dev, io-uring@vger.kernel.org, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-mtd@lists.infradead.org, linux-xfs@vger.kernel.org, linux-nfs@vger.kernel.org References: <20251223003756.409543-1-hch@lst.de> <20251223003756.409543-9-hch@lst.de> Content-Language: en-US From: Chaitanya Kulkarni In-Reply-To: <20251223003756.409543-9-hch@lst.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/22/25 16:37, Christoph Hellwig wrote: > Currently file_update_time_flags unconditionally returns -EAGAIN if any > timestamp needs to be updated and IOCB_NOWAIT is passed. This makes > non-blocking direct writes impossible on file systems with granular > enough timestamps. > > Add a S_NOWAIT to ask for timestamps to not block, and return -EAGAIN in > all methods for now. > > Signed-off-by: Christoph Hellwig > Reviewed-by: Jeff Layton Looks good. Reviewed-by: Chaitanya Kulkarni -ck