Messages in this thread | | | Date | Wed, 4 May 2022 09:59:15 -0700 | Subject | Re: [PATCH 04/16] block: allow blk-zoned devices to have non-power-of-2 zone size | From | Hannes Reinecke <> |
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On 4/27/22 09:02, Pankaj Raghav wrote: > Convert the calculations on zone size to be generic instead of relying on > power_of_2 based logic in the block layer using the helpers wherever > possible. > > The only hot path affected by this change for power_of_2 zoned devices > is in blk_check_zone_append() but the effects should be negligible as the > helper blk_queue_zone_aligned() optimizes the calculation for those > devices. Note that the append path cannot be accessed by direct raw access > to the block device but only through a filesystem abstraction. > > Finally, remove the check for power_of_2 zone size requirement in > blk-zoned.c > > Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> > Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> > --- > block/blk-core.c | 3 +-- > block/blk-zoned.c | 12 ++++++------ > 2 files changed, 7 insertions(+), 8 deletions(-) > > diff --git a/block/blk-core.c b/block/blk-core.c > index 937bb6b86331..850caf311064 100644 > --- a/block/blk-core.c > +++ b/block/blk-core.c > @@ -634,8 +634,7 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q, > return BLK_STS_NOTSUPP; > > /* The bio sector must point to the start of a sequential zone */ > - if (pos & (blk_queue_zone_sectors(q) - 1) || > - !blk_queue_zone_is_seq(q, pos)) > + if (!blk_queue_zone_aligned(q, pos) || !blk_queue_zone_is_seq(q, pos)) > return BLK_STS_IOERR; > > /* > diff --git a/block/blk-zoned.c b/block/blk-zoned.c > index 1dff4a8bd51d..f7c7c3bd148d 100644 > --- a/block/blk-zoned.c > +++ b/block/blk-zoned.c > @@ -288,10 +288,10 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, > return -EINVAL; > > /* Check alignment (handle eventual smaller last zone) */ > - if (sector & (zone_sectors - 1)) > + if (!blk_queue_zone_aligned(q, sector)) > return -EINVAL; > > - if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity) > + if (!blk_queue_zone_aligned(q, nr_sectors) && end_sector != capacity) > return -EINVAL; > > /* > @@ -489,14 +489,14 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, > * smaller last zone. > */ > if (zone->start == 0) { > - if (zone->len == 0 || !is_power_of_2(zone->len)) { > - pr_warn("%s: Invalid zoned device with non power of two zone size (%llu)\n", > - disk->disk_name, zone->len); > + if (zone->len == 0) { > + pr_warn("%s: Invalid zoned device size", > + disk->disk_name); > return -ENODEV; > } > > args->zone_sectors = zone->len; > - args->nr_zones = (capacity + zone->len - 1) >> ilog2(zone->len); > + args->nr_zones = div64_u64(capacity + zone->len - 1, zone->len);
This is a different calculation than the one you're using in the first patch. Can you please add a helper such that both are using the same calculation?
Cheers,
Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
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