btrfs: add a comment describing block reserves
authorJosef Bacik <josef@toxicpanda.com>
Tue, 4 Feb 2020 18:18:54 +0000 (13:18 -0500)
committerDavid Sterba <dsterba@suse.com>
Mon, 23 Mar 2020 16:01:26 +0000 (17:01 +0100)
commit734d8c15df8a6c2e0963e5f4133dfde4acb5fc44
tree7f44245521f310eabaa5cce56c734b16840998d1
parent4cdfd93002cb84471ed85b4999cd38077a317873
btrfs: add a comment describing block reserves

This is a giant comment at the top of block-rsv.c describing generally
how block reserves work.  It is purely about the block reserves
themselves, and nothing to do with how the actual reservation system
works.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/block-rsv.c