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authorAndreas Dilger <adilger@clusterfs.com>2007-07-18 08:38:01 -0400
committerTheodore Ts'o <tytso@mit.edu>2007-07-18 08:38:01 -0400
commitf8628a14a27eb4512a1ede43de1d9db4d9f92bc3 (patch)
tree45719452db34112382a1b3e83dc648abe45eac70 /Documentation/cputopology.txt
parent6dd4ee7cab7e3a17c571aebd444f4344c8c4946e (diff)
ext4: Remove 65000 subdirectory limit
This patch adds support to ext4 for allowing more than 65000 subdirectories. Currently the maximum number of subdirectories is capped at 32000. If we exceed 65000 subdirectories in an htree directory it sets the inode link count to 1 and no longer counts subdirectories. The directory link count is not actually used when determining if a directory is empty, as that only counts subdirectories and not regular files that might be in there. A EXT4_FEATURE_RO_COMPAT_DIR_NLINK flag has been added and it is set if the subdir count for any directory crosses 65000. A later fsck will clear EXT4_FEATURE_RO_COMPAT_DIR_NLINK if there are no longer any directory with >65000 subdirs. Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Kalpak Shah <kalpak@clusterfs.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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