On Fri, Feb 14, 2020 at 03:22:06PM -0500, Josef Bacik wrote:
> In my EIO stress testing I noticed I was getting forced to rescan the
> uuid tree pretty often, which was weird. This is because my error
> injection stuff would sometimes inject an error after log replay but
> before we loaded the UUID tree. If log replay committed the transaction
> it wouldn't have updated the uuid tree generation, but the tree was
> valid and didn't change, so there's no reason to not update the
> generation here.
>
> Fix this by setting the BTRFS_FS_UPDATE_UUID_TREE_GEN bit immediately
> after reading all the fs roots if the uuid tree generation matches the
> fs generation. Then any transaction commits that happen during mount
> won't screw up our uuid tree state, forcing us to do needless uuid
> rescans.
>
> Fixes: 70f801754728 ("Btrfs: check UUID tree during mount if required")
> Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Added to misc-next, thanks.
