From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=213.95.11.211 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793204207; b=jjpnoJMddjN7PBhUI4xPv08x4AQThgeADjozeZDbwoEy+EQ2ujOy6qmYmkJgpEsYyTkD B9AYP1EBdbREaxyWduD9K0aDKVmdiYPJ8jF04HlrscVQJb7dHCjfPJw/CvhSjLCygkTYl 6CuJnnkmwMG3ZMvIhOaF2AYn4JHyOPU6p0BoPImctsB2PvybQflqv46rwGEHf3mpcQOe+ pHhazJcpPCrRwepMsP5p6Ban5eF/P7kAHrUWvWAVCPb/lTl5KPtJoazEtfspHIcdOMy+2 +JF/WJW0H6gdXyqCc58SePvfMyK1lZ8lfu7ShCCmefAgh/ZI44eIeVC5bCkSXrI1Aqw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793204207; h=DMARC-Filter:Received:Date:From:To:Cc:Subject:Message-ID:References: MIME-Version:Content-Type:Content-Disposition:In-Reply-To:User-Agent; bh=iTAj/l0Wsa0dWyHr2HUK0KSTuSgtFX39Oe4ZR01XU7Q=; b=BW334XipzAgQasL6SvcibiwhUKrmEuYoemtjA2rKqjYMegvE6y4IFwlddZVDvjLWQPsU c1mAlU0AqsSitGcME5r8yHcp1BRvfg9OzVVIbGvBfnAXcKTaG4C+pNr1MrqtMJqsp/J9v M7n1SrFMl31cOzN7OD56gF2JbtMGhGsUgyWaedlZ9MMHztS8HQN53wiwUGrOLB1NqINnp gINe1Sv8tk2KXGadxZdUGoY9z+9dfIgoosszTDT/9au0yhjGscbf+oYout1fijY2C4F4e zJB95Nv7/TIMp0n140FPCbKPOQG55xhtBWLY297ELkj0AiV6DCGjBp6MJa1jXx2j8Vw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=lst.de; spf=pass smtp.mailfrom=lst.de; arc=none smtp.remote-ip=213.95.11.211 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 008EF606A31C for ; Wed, 28 Oct 2026 16:16:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 008EF606A31C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lst.de Received: by verein.lst.de (Postfix, from userid 2407) id 1A74B68C4E; Wed, 28 Oct 2026 17:16:40 +0100 (CET) Date: Wed, 28 Oct 2026 17:16:39 +0100 From: Christoph Hellwig To: Keith Busch Cc: Erwan Velu , linux-nvme@lists.infradead.org, axboe@kernel.dk, hch@lst.de, sagi@grimberg.me, linux-kernel@vger.kernel.org, Erwan Velu Subject: Re: [PATCH] nvme: honor the volatile write cache enable state Message-ID: <20261028161639.GA21871@lst.de> References: <7fec6534-9e57-4041-8699-72c5950c7e2a@criteo.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) On Wed, Oct 28, 2026 at 10:08:05AM -0600, Keith Busch wrote: > > Considering the performance impact for these type of device,s would you be > > open to a backport to stable once merged ? > > Not sure when a performance improvement is stable worthy. I'm more > concerned that doing this is going to expose corruption, but it's what > the device is asking for, so fine to introduce it, but stable is > questionable. Same here. We should not send these improvements to stable, but let them soak in linux-next and mainline.