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SubjectRe: [PATCH v3 0/2] Export max open zones and max active zones to sysfs
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On 7/14/20 3:18 PM, Niklas Cassel wrote:
> Export max open zones and max active zones to sysfs.
>
> This patch series in based on Jens's linux-block/for-next branch.
>
> All zoned block devices in the kernel utilize the "zoned block device
> support" (CONFIG_BLK_DEV_ZONED).
>
> The Zoned Namespace Command Set Specification defines two different
> resource limits: Max Open Resources and Max Active Resources.
>
> The ZAC and ZBC standards define a MAXIMUM NUMBER OF OPEN SEQUENTIAL WRITE
> REQUIRED ZONES field.
>
>
> Since the ZNS Max Open Resources field has the same purpose as the ZAC/ZBC
> field, (the ZNS field is 0's based, the ZAC/ZBC field isn't), create a
> common "max_open_zones" definition in the sysfs documentation, and export
> both the ZNS field and the ZAC/ZBC field according to this new common
> definition.
>
> The ZNS Max Active Resources field does not have an equivalent field in
> ZAC/ZBC, however, since both ZAC/ZBC and ZNS utilize the "zoned block
> device support" in the kernel, create a "max_active_zones" definition in
> the sysfs documentation, similar to "max_open_zones", and export it
> according to this new definition. For ZAC/ZBC devices, this field will be
> exported as 0, meaning "no limit".

Applied, thanks.

--
Jens Axboe

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