[PATCH 05/15] block: add a max_user_discard_sectors queue limit

[Christoph Hellwig]

On Mon, Jan 22, 2024 at 11:27:15AM -0700, Keith Busch wrote:
> > +	q->limits.max_user_discard_sectors = max_discard_bytes >> SECTOR_SHIFT;
> > +	q->limits.max_discard_sectors =
> > +		min_not_zero(q->limits.max_hw_discard_sectors,
> > +			     q->limits.max_user_discard_sectors);
> 
> Shouldn't writing 0 disable discards?

I mirror the max_user_sectors behavior here, where 0 disables the
user limiting.  But yes, that would be a behavior change.