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Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [LSF/MM/BPF BoF] BoF for Zoned Storage Content-Language: en-US To: =?UTF-8?Q?Javier_Gonz=c3=a1lez?= , Christoph Hellwig Cc: Keith Busch , James Bottomley , Luis Chamberlain , Dave Chinner , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, lsf-pc@lists.linux-foundation.org, =?UTF-8?Q?Matias_Bj=c3=b8rling?= , Damien Le Moal , Bart Van Assche , Adam Manzanares , Keith Busch , Johannes Thumshirn , Naohiro Aota , Pankaj Raghav , Kanchan Joshi , Nitesh Shetty References: <69932637edee8e6d31bafa5fd39e19a9790dd4ab.camel@HansenPartnership.com> <20220307151556.GB3260574@dhcp-10-100-145-180.wdc.com> <8f8255c3-5fa8-310b-9925-1e4e8b105547@opensource.wdc.com> <20220311072101.k52rkmsnecolsoel@ArmHalley.localdomain> <61c1b49c-cd34-614a-876a-29b796e4ff0d@opensource.wdc.com> <20220311075317.fjn3mj25dpicnpgi@ArmHalley.local> <20220311085925.c66kly5zy6otgcer@ArmHalley.local> From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <20220311085925.c66kly5zy6otgcer@ArmHalley.local> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 3/11/22 17:59, Javier Gonz=C3=A1lez wrote: > On 11.03.2022 00:46, Christoph Hellwig wrote: >> On Fri, Mar 11, 2022 at 08:53:17AM +0100, Javier Gonz=C3=A1lez wrote: >>> How do you propose we meed the request from Damien to support _all_ >>> existing users if we remove the PO2 constraint from the block layer? >> >> By actually making the users support it. Not by adding crap to >> block drivers to pretend that they are exposing something totally >> different than what they actually are. >=20 > Ok. Is it reasonable for you that we start removing the PO2 check in th= e > block layer and then add btrfs support? This will mean that some > applications that assume PO2 will not work. >=20 > Damien: Are you OK with this? See my answer to Luis's email. >=20 > We can then work on other parts as needed (e.g., ZoneFS) --=20 Damien Le Moal Western Digital Research