On 17/09/2020 09:57, Niklas Cassel wrote: > On Mon, Sep 07, 2020 at 08:18:26AM +0000, Niklas Cassel wrote: >> On Fri, Aug 28, 2020 at 12:54:00PM +0200, Niklas Cassel wrote: >>> Add support for user space to set a max open zone and a max active zone >>> limit via configfs. By default, the default values are 0 == no limit. >>> >>> Call the block layer API functions used for exposing the configured >>> limits to sysfs. >>> >>> Add accounting in null_blk_zoned so that these new limits are respected. >>> Performing an operation that would exceed these limits results in a >>> standard I/O error. >>> >>> A max open zone limit exists in the ZBC standard. >>> While null_blk_zoned is used to test the Zoned Block Device model in >>> Linux, when it comes to differences between ZBC and ZNS, null_blk_zoned >>> mostly follows ZBC. >>> >>> Therefore, implement the manage open zone resources function from ZBC, >>> but additionally add support for max active zones. >>> This enables user space not only to test against a device with an open >>> zone limit, but also to test against a device with an active zone limit. >>> >>> Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx> >>> Reviewed-by: Damien Le Moal <damien.lemoal@xxxxxxx> >>> --- >>> Changes since v2: >>> -Picked up Damien's Reviewed-by tag. >>> -Fixed a typo in the commit message. >>> -Renamed null_manage_zone_resources() to null_has_zone_resources(). >>> >>> drivers/block/null_blk.h | 5 + >>> drivers/block/null_blk_main.c | 16 +- >>> drivers/block/null_blk_zoned.c | 319 +++++++++++++++++++++++++++------ >>> 3 files changed, 282 insertions(+), 58 deletions(-) >> >> Hello Jens, >> >> A gentle ping on this. >> >> As far as I can tell, there are no outstanding review comments. > > > Hello Jens, > > Pinging you from another address, in case my corporate email is getting > stuck in your spam filter. > > Kind regards, > Niklas > Jens, Any chance we can get this queued up for 5.10? This is really helpful for e.g. the zonefs test suite or xfstests when btrfs HMZONED support lands. Thanks, Johannes
