Re: [PATCH 02/19] btrfs: Get zone information of zoned block devices

From: Naohiro Aota
Date: Tue Jun 18 2019 - 03:31:59 EST

On 2019/06/13 22:58, Josef Bacik wrote:
> On Fri, Jun 07, 2019 at 10:10:08PM +0900, Naohiro Aota wrote:
>> If a zoned block device is found, get its zone information (number of zones
>> and zone size) using the new helper function btrfs_get_dev_zonetypes(). To
>> avoid costly run-time zone report commands to test the device zones type
>> during block allocation, attach the seqzones bitmap to the device structure
>> to indicate if a zone is sequential or accept random writes.
>> This patch also introduces the helper function btrfs_dev_is_sequential() to
>> test if the zone storing a block is a sequential write required zone.
>> Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx>
>> Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
>> ---
>> fs/btrfs/volumes.c | 143 +++++++++++++++++++++++++++++++++++++++++++++
>> fs/btrfs/volumes.h | 33 +++++++++++
>> 2 files changed, 176 insertions(+)
> We have enough problems with giant files already, please just add a separate
> hmzoned.c or whatever and put all the zone specific code in there. That'll save
> me time when I go and break a bunch of stuff out. Thanks,
> Josef

Thank you for the reviews.

I'll add hmzoned.c and put the things (with more helpers/abstraction) there in the next version.