On Aug 26, 2025 / 09:27, Shin'ichiro Kawasaki wrote:
> The kernel commit 04147d8394e8 ("btrfs: zoned: limit active zones to
> max_open_zones") introduced in kernel version v6.17-rc3 caused the
> zbd/009 test case to hang during execution. The hang happens because
> zoned btrfs requires the maximum active zones limit of zoned block
> devices to be at least 11 or greater. The kernel commit applies this
> same requirement to the maximum open zones limit also.
>
> However, by default, the maximum open zones limit for zoned scsi_debug
> devices is 8. The test case zbd/009 creates a scsi_debug device with
> this limit and set up zoned btrfs. Thereby it violates the 11-zones
> requirement, which resulted in the hang.
>
> To avoid the hang, increase the max open zones limit of the scsi_debug
> device from the default value 8 to 16.
>
> Suggested-by: Naohiro Aota <naohiro.aota@xxxxxxx>
> Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>
FYI, I applied this patch.
