Add the documentation about the zoned device support to virtio-blk
emulation.
Signed-off-by: Sam Li
Reviewed-by: Stefan Hajnoczi
---
docs/devel/zoned-storage.rst | 41 ++
docs/system/qemu-block-drivers.rst.inc | 6
2 files changed, 47 insertions(+)
Use get_sysfs_str_val() to get the string value of device
zoned model. Then get_sysfs_zoned_model() can convert it to
BlockZoneModel type of QEMU.
Use get_sysfs_long_val() to get the long value of zoned device
information.
Signed-off-by: Sam Li
Reviewed-by: Hannes Reinecke
Reviewed-by: Stefan
We have added new block layer APIs of zoned block devices. Test it with:
Create a null_blk device, run each zone operation on it and see
whether reporting right zone information.
Signed-off-by: Sam Li
Reviewed-by: Stefan Hajnoczi
---
tests/qemu-iotests/tests/zoned.out | 53 +++
Putting zoned/non-zoned BlockDrivers on top of each other is not
allowed.
Signed-off-by: Sam Li
Reviewed-by: Stefan Hajnoczi
---
block.c | 14 ++
block/file-posix.c | 14 ++
block/raw-format.c | 1 +
Signed-off-by: Sam Li
Reviewed-by: Stefan Hajnoczi
Reviewed-by: Damien Le Moal
---
include/block/block-common.h | 43
1 file changed, 43 insertions(+)
diff --git a/include/block/block-common.h b/include/block/block-common.h
index fdb7306e78..36bd0e480e
raw-format driver usually sits on top of file-posix driver. It needs to
pass through requests of zone commands.
Signed-off-by: Sam Li
Reviewed-by: Stefan Hajnoczi
---
block/raw-format.c | 13 +
1 file changed, 13 insertions(+)
diff --git a/block/raw-format.c b/block/raw-format.c
Add a new zoned_host_device BlockDriver. The zoned_host_device option
accepts only zoned host block devices. By adding zone management
operations in this new BlockDriver, users can use the new block
layer APIs including Report Zone and four zone management operations
(open, close, finish, reset).
Zoned Block Devices (ZBDs) devide the LBA space to block regions called zones
that are larger than the LBA size. It can only allow sequential writes, which
reduces write amplification in SSD, leading to higher throughput and increased
capacity. More details about ZBDs can be found at:
On Donnerstag, 8. September 2022 13:23:53 CEST Linus Heckemann wrote:
> The previous implementation would iterate over the fid table for
> lookup operations, resulting in an operation with O(n) complexity on
> the number of open files and poor cache locality -- for every open,
> stat, read, write,
On Aug 12 13:01, Niklas Cassel wrote:
> The intention of the Zoned Namespace Command Set Specification was
> never to make an automatic zone transition optional.
>
> Excerpt from the nvmexpress.org zns mailing list:
> """
> A question came up internally on the differences between ZNS and ZAC/ZBC
On Fri, Aug 12, 2022 at 01:01:37PM +0200, Niklas Cassel wrote:
> The intention of the Zoned Namespace Command Set Specification was
> never to make an automatic zone transition optional.
>
> Excerpt from the nvmexpress.org zns mailing list:
> """
> A question came up internally on the differences
On 08.09.2022 19:45, Denis V. Lunev wrote:
On 9/8/22 19:15, Denis V. Lunev wrote:
On 9/2/22 10:52, Alexander Ivanov wrote:
Cluster offsets must be unique among all BAT entries.
Find duplicate offsets in the BAT.
If a duplicated offset is found fix it by copying the content
of the relevant
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