Hi,
The problem I'm having is that I'm trying to install debian on
an embedded system onto an sdcard. During installation it will
format the target filesystem, but the "mkfs.ext4 -F /dev/mmcblk0p2"
takes ages.
What I've found out so far:
- mkfs.ext4 tries to discard all blocks on the target device
- with my target device being an sdcard it seems to fallback
to normal erase [1], with erase_arg being set to what the card
is capable of [2]
Now I'm trying to figure out if this behavior is intended. I guess
one can reduce it to "blkdiscard /dev/mmcblk0p2". Should this
actually fall back to normal erasing or should it return -EOPNOTSUPP?
-michael
[1]
https://elixir.bootlin.com/linux/v5.9.12/source/drivers/mmc/core/block.c#L1063
[2]
https://elixir.bootlin.com/linux/v5.9.12/source/drivers/mmc/core/mmc.c#L1751
