On Wed, Feb 12, 2020 at 04:17:00PM +0900, Johannes Thumshirn wrote:
> Super-block reading in BTRFS is done using buffer_heads. Buffer_heads have
> some drawbacks, like not being able to propagate errors from the lower
> layers.
>
> Directly use the page cache for reading the super-blocks from disk or
> invalidating an on-disk super-block. We have to use the page-cache so to
> avoid races between mkfs and udev. See also 6f60cbd3ae44 ("btrfs: access
> superblock via pagecache in scan_one_device").
>
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
>
> ---
> Changes to v6:
> - Warn if we can't write out a page for a superblock (David)
Shouldn't there be some real error handling instead of just a warning?
At least shut down the file system?
