f2fs: improve shrink performance of extent nodes
On the worst case, we need to scan the whole radix tree and every rb-tree to free the victimed extent_nodes when shrinking. Pengyang initially introduced a victim_list to record the victimed extent_nodes, and free these extent_nodes by just scanning a list. Later, Chao Yu enhances the original patch to improve memory footprint by removing victim list. The policy of lru list shrinking becomes: 1) lock lru list's lock 2) trylock extent tree's lock 3) remove extent node from lru list 4) unlock lru list's lock 5) do shrink 6) repeat 1) to 5) Signed-off-by: NHou Pengyang <houpengyang@huawei.com> Signed-off-by: NChao Yu <chao2.yu@samsung.com> Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
Showing
想要评论请 注册 或 登录