btrfs: improve comments around nocow path

Browse source

run_delalloc_nocow contains numerous, somewhat subtle, checks when
figuring out whether a particular extent should be CoW'ed or not. This
patch explicitly states the assumptions those checks verify. As a
result also document 2 of the more subtle checks in check_committed_ref
as well.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

This commit is contained in:

Nikolay Borisov 2019-08-21 10:42:57 +03:00 • committed by David Sterba

parent 3e024846d2

commit a6bd9cd155

2 changed files with 50 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

fs/btrfs/extent-tree.c

View file

51

fs/btrfs/inode.c

View file