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Filipe Manana
a8607c1c30
This test is motivated by an fsync issue discovered in btrfs. The issue was that after punching a hole for a small range, which affected only a partial page, an fsync operation would have no effect at all. This was because for this particular case the btrfs hole punching implementation did not update some btrfs specific inode metadata that is required to determine if an fsync operation needs to update the fsync log. For this to happen, it was also necessary that in the transaction where the hole punching was performed, and before the fsync operation, no other operation that modified the file (or its metadata) was performed. The btrfs issue was fixed by the following linux kernel patch: Btrfs: add missing inode update when punching hole Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
32 lines
981 B
Plaintext
32 lines
981 B
Plaintext
QA output created by 059
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wrote 16384/16384 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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File content before:
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0000000 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0017500 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0027500 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0035220 22 22 22 22 22 22 22 22 00 00 00 00 00 00 00 00
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0035240 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0035360 00 00 00 00 00 00 00 00 00 00 00 00 22 22 22 22
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0035400 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0040000
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File content after:
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0000000 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0017500 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0027500 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0035220 22 22 22 22 22 22 22 22 00 00 00 00 00 00 00 00
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0035240 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0035360 00 00 00 00 00 00 00 00 00 00 00 00 22 22 22 22
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0035400 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
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*
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0040000
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