On 3/10/22 11:10, Jens Axboe wrote:

On 3/10/22 11:50 AM, Luca Porzio (lporzio) wrote:

quoted

Micron Confidential

quoted

You do both realize that this is just the file specific hint? Inode based hints
will still work fine for UFS.

--
Jens Axboe

Jens,

Thanks for this reply.

This whole patch series removes support for per-bio write_hint.
Without bio write_hint, F2FS won't be able to cascade Hot/Warm/Cold
information to SCSI / UFS driver.

This is my current understanding. I might be wrong but I don't think we
Are concerned with inode hint (as well as file hints).

But ufs/scsi doesn't use it in mainline, as far as I can tell. So how
does that work?

Hi Luca,

I'm not aware of any Android branch on which the UFS driver or the SCSI 
core uses bi_write_hint or the struct request write_hint member. Did I 
perhaps overlook something?

Thanks,

Bart.