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author | Eric Sandeen <sandeen@redhat.com> | 2008-08-02 21:21:08 -0400 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2008-08-02 21:21:08 -0400 |
commit | b5f10eed8125702929e57cca7e5956b1b9b6d015 (patch) | |
tree | e5b38a6f654baea3658bf100320a4d66387988a3 /Documentation/fb/imacfb.txt | |
parent | e29d1cde63be0b5f1739416b5574a83c34bf8eeb (diff) |
ext4: lock block groups when initializing
I noticed when filling a 1T filesystem with 4 threads using the
fs_mark benchmark:
fs_mark -d /mnt/test -D 256 -n 100000 -t 4 -s 20480 -F -S 0
that I occasionally got checksum mismatch errors:
EXT4-fs error (device sdb): ext4_init_inode_bitmap: Checksum bad for group 6935
etc. I'd reliably get 4-5 of them during the run.
It appears that the problem is likely a race to init the bg's
when the uninit_bg feature is enabled.
With the patch below, which adds sb_bgl_locking around initialization,
I was able to complete several runs with no errors or warnings.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation/fb/imacfb.txt')
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