Re: ls & flush-btrfs-1 sit at 100% sys

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Excerpts from Brian Sullivan's message of 2010-11-18 13:30:51 -0500:
> Yep actually, with noatime,nodiratime ls is fine.  I didn't try ro but
> I assume that'll work too.  So with noatime,nodiratime I can go around
> in tree and ls works.  If I try to touch a new file, touch doesn't
> return.  If I then ls in that same folder ls doesn't return either.
> So yeah seems like soon as something has to write.
> 
> Also after I run touch, it doesn't return, I look at top, nothing is
> spinning, everything is at 0% usage.  After a minute or so then touch
> and flush-btrfs-1 jump to 50%sys each and sit there.

So, based on this trace we're banging on the delalloc flushing to free
up room.

I just wanted to confirm, you're seeing this with 2.6.37-rc?  I thought
I had fixed up this delalloc hammering.

-chris
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