[Bugs] [Bug 1206461] sparse file self heal fail under xfs version 2 with speculative preallocation feature on

bugzilla at redhat.com bugzilla at redhat.com
Wed Apr 1 02:35:55 UTC 2015


https://bugzilla.redhat.com/show_bug.cgi?id=1206461



--- Comment #5 from Ravishankar N <ravishankar at redhat.com> ---
Hmm, so this is not a bug per se. It is  just that XFS takes more time to free
the prealloc'd blocks.

By the way, in your bug description, you say "With both full and diff
algorithm, file big2bigger would become sparse file after self heal was done."
This is the expected behaviour because the test creates big2bigger as a sparse
file:

TEST dd if=/dev/urandom of=$M0/big2bigger count=1 bs=1024k 
TEST truncate -s 2M $M0/big2bigger

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