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ext4: introduce aging to extent status tree
authorJan Kara <jack@suse.cz>
Tue, 25 Nov 2014 16:55:24 +0000 (11:55 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Tue, 25 Nov 2014 16:55:24 +0000 (11:55 -0500)
commit2be12de98a1cc21c4de4e2d6fb2bf5aa0a279947
tree4cd9da2b11616ee1a38bb1ac677ca7ec90bef2b7tree | snapshot
parent624d0f1dd7c80d2bac4fc3066b2ff3947f890883commit | diff
ext4: introduce aging to extent status tree

Introduce a simple aging to extent status tree. Each extent has a
REFERENCED bit which gets set when the extent is used. Shrinker then
skips entries with referenced bit set and clears the bit. Thus
frequently used extents have higher chances of staying in memory.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/ext4/extents_status.c diff | blob | history
fs/ext4/extents_status.h diff | blob | history
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