Re: [PATCHv10 0/9] write hints with nvme fdp, scsi streams

[Javier Gonzalez <javier.gonz@samsung.com>]

On 11.11.2024 09:37, Johannes Thumshirn wrote:
>On 11.11.24 10:31, Javier Gonzalez wrote:
>> On 11.11.2024 07:51, Christoph Hellwig wrote:
>>> On Fri, Nov 08, 2024 at 05:43:44PM +0000, Javier Gonzalez wrote:
>>>> We have been iterating in the patches for years, but it is unfortunately
>>>> one of these series that go in circles forever. I don't think it is due
>>>> to any specific problem, but mostly due to unaligned requests form
>>>> different folks reviewing. Last time I talked to Damien he asked me to
>>>> send the patches again; we have not followed through due to bandwidth.
>>>
>>> A big problem is that it actually lacks a killer use case.  If you'd
>>> actually manage to plug it into an in-kernel user and show a real
>>> speedup people might actually be interested in it and help optimizing
>>> for it.
>>>
>>
>> Agree. Initially it was all about ZNS. Seems ZUFS can use it.
>>
>> Then we saw good results in offload to target on NVMe-OF, similar to
>> copy_file_range, but that does not seem to be enough. You seem to
>> indicacte too that XFS can use it for GC.
>>
>> We can try putting a new series out to see where we are...
>
>I don't want to sound like a broken record, but I've said more than
>once, that btrfs (regardless of zoned or non-zoned) would be very
>interested in that as well and I'd be willing to help with the code or
>even do it myself once the block bits are in.
>
>But apparently my voice doesn't count here

You are right. Sorry I forgot.

Would this be through copy_file_range or something different?