tree 36dba549ded1f7c7b37bd854fb20d55bff89787d
parent 20f4d6c3a2a23c5d7d9cc7f42fbb943ca7a03d1f
author Theodore Ts'o <tytso@mit.edu> 1235236404 -0500
committer Theodore Ts'o <tytso@mit.edu> 1235236404 -0500

ext4: Add fallback for find_group_flex

This is a workaround for find_group_flex() which badly needs to be
replaced.  One of its problems (besides ignoring the Orlov algorithm)
is that it is a bit hyperactive about returning failure under
suspicious circumstances.  This can lead to spurious ENOSPC failures
even when there are inodes still available.

Work around this for now by retrying the search using
find_group_other() if find_group_flex() returns -1.  If
find_group_other() succeeds when find_group_flex() has failed, log a
warning message.

A better block/inode allocator that will fix this problem for real has
been queued up for the next merge window.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>