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6cae615a47
When cloning multiply-claimed blocks for an inode, clone_file() uses ext2fs_block_iterate3() to iterate every block calling clone_file_block(). clone_file_block() calls check_if_fs_cluster(), even the block is not on the block_dup_map, which could take a long time on a large device. Only check if it's metadata block when we need to clone it. Test block_metadata_map in check_if_fs_block() and check_if_fs_cluster(), so we don't need to go over each bg every time. The metadata blocks are already marked in the bitmap. Before this patch on a 500TB device with 3 files having 3 multiply-claimed blocks between them, pass1b is stuck for more than 48 hours without progressing, before e2fsck was terminated. After this patch pass1b could finish in 180 seconds. Signed-off-by: Li Dongyang <dongyangli@ddn.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
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