Commit 100136ac authored Sep 11, 2015 by Chao Yu Committed by Jaegeuk Kim Oct 09, 2015

f2fs: fix incorrect searching position when shrinking extent cache



When shrinking extent cache, we have two steps in the flow:
1) shrink objects which are unreferenced by inodes;
2) shrink objects from LRU list of extent cache.

In step 1, if we haven't shrunk enough number of objects, we will try
step 2, but before that we didn't update the searching position which
may point to last inode index in global extent tree, result in failing
to shrink objects by traversing the all inodes' extent tree.

In this patch, we reset searching position to beginning of global extent
tree for fixing.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent c998012b

fs/f2fs/extent_cache.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -652,6 +652,11 @@ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *sbi, int nr_shrink)
		}
		spin_unlock(&sbi->extent_lock);

		/*
		* reset ino for searching victims from beginning of global extent tree.
		*/
		ino = F2FS_ROOT_INO(sbi);

		while ((found = radix_tree_gang_lookup(root,
		(void **)treevec, ino, EXT_TREE_VEC_SIZE))) {
		unsigned i;

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