[Bug 20902] High IO wait when writing to ext4

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





--- Comment #12 from Martin Moerch <martinmoerch@xxxxxxxxx>  2010-10-29 21:46:35 ---
I remember first noticing it as far back as when 8.04 came out, and has
happened ever since. However, around that time, my LVM grew substantially
aswell for the next year. So if it's 8.04 and up, or if it's the size of the
LVM as it gets larger, I don't know.

By "first write" I mean the first write after a reboot. As soon as the system
wants to flush data to the drives, it starts this cycle of slow and cumbersome
I/O waiting.

I'm using the mount options as per the tune2fs attachment further up.

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