Messages in this thread | | | Date | Sat, 16 Feb 2002 11:14:50 -0500 | Subject | ext2_free_blocks: Freeing blocks not in datazone - began with 2.5.3-dj5 | From | rwhron@earthlin ... |
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My test system started giving ext2_free_blocks errors on 2.5.3-dj5:
2.5.3-dj5 running tiobench.pl -s 2048 -t 8: Feb 10 19:12:40 mountain kernel: EXT2-fs error (device ide1(22,3)): ext2_free_blocks: Freeing blocks not in datazone - block = 2048136, count = 120
2.5.3-dj5 with taskfile i/o enabled running tiobench.pl -s 2048 -t 8 Feb 13 03:00:15 mountain kernel: EXT2-fs error (device ide1(22,3)): ext2_free_blocks: Freeing blocks not in datazone - block = 2048088, count = 168
2.5.4-dj2 running dbench 128: Feb 15 19:49:44 mountain kernel: EXT2-fs error (device ide1(22,3)): ext2_free_blocks: Freeing blocks not in datazone - block = 2048174, count = 82
At this point I did an e2fsck on the filesystem. e2fsck found some Block bitmap differences in the 2048xxx range.
With help from cdub on #kerneljanitors, I added the debug below to ext2_free_blocks in fs/ext2/balloc.c:
ext2_error (sb, "ext2_free_blocks", "Freeing blocks not in datazone - " "first_data_block = %lu, block = %lu " "count = %lu, blocks_count = %lu", le32_to_cpu(es->s_first_data_block), block, count, le32_to_cpu(es->s_blocks_count));
2.5.4-dj2 running tiobench.pl -s 2048 -t 8: Feb 16 00:49:21 mountain kernel: EXT2-fs error (device ide1(22,3)): ext2_free_blocks: Freeing blocks not in datazone - first_data_block = 0, block = 2047648 count = 608, blocks_count = 2048256
Based on an earlier suggestion from cdub, I changed:
block + count >= le32_to_cpu(es->s_blocks_count)) { to block + count > le32_to_cpu(es->s_blocks_count)) {
At this point I did an e2fsck on the filesystem. e2fsck fixed some Block bitmap differences in the -2047648 to -2048255 block range. I re-ran the dbench 128, and tiobench.pl 8 16 32 64 128 and did not get any errors. Don't know if above is the proper fix or not, but it seems to work, and is closer to 2.5.5-pre1.
2.5.4-pre5, 2.5.5-pre1, and 3 other kernels tested after the first appearance of the error had no problems. 2.5.3-dj4 was okay too.
Hope this helps. -- Randy Hron
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