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btrfs: add cond_resched() calls when resolving backrefs

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Since backref resolution is CPU-intensive, the cond_resched calls
should help alleviate soft lockup occurences.

Signed-off-by: Edmund Nadolski <enadolski@suse.com>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Edmund Nadolski 2017-07-12 16:20:09 -06:00 committed by David Sterba
parent 00142756e1
commit 9dd14fd696
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/backref.c
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@ -660,6 +660,7 @@ static int resolve_indirect_refs(struct btrfs_fs_info *fs_info,
prelim_ref_insert(fs_info, &preftrees->direct, ref); prelim_ref_insert(fs_info, &preftrees->direct, ref);
ulist_reinit(parents); ulist_reinit(parents);
cond_resched();
} }
out: out:
ulist_free(parents); ulist_free(parents);
@ -702,6 +703,7 @@ static int add_missing_keys(struct btrfs_fs_info *fs_info,
btrfs_tree_read_unlock(eb); btrfs_tree_read_unlock(eb);
free_extent_buffer(eb); free_extent_buffer(eb);
prelim_ref_insert(fs_info, &preftrees->indirect, ref); prelim_ref_insert(fs_info, &preftrees->indirect, ref);
cond_resched();
} }
return 0; return 0;
} }
@ -1243,6 +1245,7 @@ again:
} }
eie = NULL; eie = NULL;
} }
cond_resched();
} }
out: out: