Btrfs: document rules about bio async submit

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These rules have been hidden in several if-else and are not
straightforward to follow, for example, dio submit hook's nocsum case
has a bug , i.e. doing async submit instead of sync submit, which has
been fixed recently.

This is documenting the rules for reference.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Liu Bo 2017-11-01 17:19:27 -06:00 • committed by David Sterba

parent 057aac3e62

commit 4c274bc67b

1 changed files with 16 additions and 1 deletions

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fs/btrfs/inode.c

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