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author | Josef Bacik <jbacik@redhat.com> | 2009-02-20 11:00:09 -0500 |
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committer | Chris Mason <chris.mason@oracle.com> | 2009-02-20 11:00:09 -0500 |
commit | 6a63209fc02d5483371f07e4913ee8abad608051 (patch) | |
tree | 7595e0df452928b677b66a64baf0cb3b7ec53dfc /README | |
parent | 2cfbd50b536c878e58ab3681c4e944fa3d99b415 (diff) |
Btrfs: add better -ENOSPC handling
This is a step in the direction of better -ENOSPC handling. Instead of
checking the global bytes counter we check the space_info bytes counters to
make sure we have enough space.
If we don't we go ahead and try to allocate a new chunk, and then if that fails
we return -ENOSPC. This patch adds two counters to btrfs_space_info,
bytes_delalloc and bytes_may_use.
bytes_delalloc account for extents we've actually setup for delalloc and will
be allocated at some point down the line.
bytes_may_use is to keep track of how many bytes we may use for delalloc at
some point. When we actually set the extent_bit for the delalloc bytes we
subtract the reserved bytes from the bytes_may_use counter. This keeps us from
not actually being able to allocate space for any delalloc bytes.
Signed-off-by: Josef Bacik <jbacik@redhat.com>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions