[Bug 20902] High IO wait when writing to ext4

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https://bugzilla.kernel.org/show_bug.cgi?id=20902





--- Comment #18 from Justin Maggard <jmaggard10@xxxxxxxxx>  2010-11-24 18:41:31 ---
Created an attachment (id=38102)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=38102)
tune2fs -l output

Yep, the trace covers the entire test, starting at mount.

The writes are done in series, buffered IO, same subdir, without a sync. 
Here's all I'm doing:

for i in $(seq 1 10); do
  dd if=/dev/zero of=$testdir/test.$i bs=1M count=128
done

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