On Mon, Jun 25, 2012 at 12:30:34PM -0600, Alex Lyakas wrote:

Greetings everybody,

I am running a fio test on btrfs compiled from
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git,
up to commit:
cb77fcd88569cd2b7b25ecd4086ea932a53be9b3 Btrfs: delay iput with async extents
including this commit.

Below is a fio configuration file, and later fio textual output.
Here:
https://docs.google.com/folder/d/0B1AuaIB8xZtbNTRuSW1zVGozWFE/edit
are "expected" vs "received" mismatch reports. Strangely, when I read
the mismatched block from the file reported as corrupted by fio, I
receive data different both from "expected" and "received" blocks that
fio reports. I added one such file (job0.1.0.88576.now) to the
pastebin as well.

If you think that my fio configuration file is faulty, please let me
know. fio version is 1.59. The idea is to run 10 io processes in
parallel.

Mount options?  I'm running the test now, I'll let you know if I can reproduce.
Thanks,

Josef