On Fri, Aug 07, 2026 at 01:56:36AM +0200, Niklas Cassel wrote: > Looking at the write_granularity in virtio-blk + file-posix: > for blkcfg.zoned.write_granularity, which is what virtio-blk exposes to > the guest, it is initialized using: > https://github.com/qemu/qemu/blob/v11.1.0-rc3/hw/block/virtio-blk.c#L1257 > conf->logical_block_size: > https://github.com/qemu/qemu/blob/v11.1.0-rc3/hw/block/virtio-blk.c#L1183 > > and the value we set to the qemu block layer - bs->bl.write_granularity, > which file-posix initilizes using: > https://github.com/qemu/qemu/blob/v11.1.0-rc3/block/file-posix.c#L1498-L1501 > the sysfs value for physical_block_size.
If we are using sysfs, I wonder why this code does not simply read: /sys/block/<disk>/queue/zone_write_granularity instead. But that would still be inconsistent with blkcfg.zoned.write_granularity which is initialized using conf->logical_block_size. Kind regards, Niklas
