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authorChristoph Hellwig <hch@lst.de>2023-12-17 17:53:57 +0100
committerJens Axboe <axboe@kernel.dk>2023-12-19 20:17:43 -0700
commit7437bb73f087e5f216f9c6603f5149d354e315af (patch)
treed3fbe5cb3e4e91e1062e9c25f7fd8a39ed761309 /drivers/nvme
parenta971ed8002110f211899279cd7295756d263b771 (diff)
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block: remove support for the host aware zone model
When zones were first added the SCSI and ATA specs, two different models were supported (in addition to the drive managed one that is invisible to the host): - host managed where non-conventional zones there is strict requirement to write at the write pointer, or else an error is returned - host aware where a write point is maintained if writes always happen at it, otherwise it is left in an under-defined state and the sequential write preferred zones behave like conventional zones (probably very badly performing ones, though) Not surprisingly this lukewarm model didn't prove to be very useful and was finally removed from the ZBC and SBC specs (NVMe never implemented it). Due to to the easily disappearing write pointer host software could never rely on the write pointer to actually be useful for say recovery. Fortunately only a few HDD prototypes shipped using this model which never made it to mass production. Drop the support before it is too late. Note that any such host aware prototype HDD can still be used with Linux as we'll now treat it as a conventional HDD. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20231217165359.604246-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/zns.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index ec8557810c21..6d4c440e97e2 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -108,7 +108,7 @@ int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
goto free_data;
}
- disk_set_zoned(ns->disk, BLK_ZONED_HM);
+ disk_set_zoned(ns->disk, true);
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
disk_set_max_open_zones(ns->disk, le32_to_cpu(id->mor) + 1);
disk_set_max_active_zones(ns->disk, le32_to_cpu(id->mar) + 1);