Re: [PATCH] block: make maximum zone append size configurable

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

> diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
> index 7dda709f3ccb..78817d7acb66 100644
> --- a/block/blk-sysfs.c
> +++ b/block/blk-sysfs.c
> @@ -246,6 +246,11 @@ queue_max_sectors_store(struct request_queue *q, const char
> *page, size_t count)
>         spin_lock_irq(&q->queue_lock);
>         q->limits.max_sectors = max_sectors_kb << 1;
>         q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
> +
> +       q->limits.max_zone_append_sectors =
> +               min(q->limits.max_sectors,
> +                   q->limits.max_hw_zone_append_sectors);
> +
>         spin_unlock_irq(&q->queue_lock);
> 
>         return ret;

Yes, this looks pretty sensible.  I'm not even sure we need the field,
just do the min where we build the bio instead of introducing another
field that needs to be maintained.