Re: Hot rb_next, setup_cluster_no_bitmap

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On Wed, Aug 03, 2011 at 03:39:49PM -0700, Simon Kirby wrote:

> On Wed, Aug 03, 2011 at 03:06:55PM -0700, Simon Kirby wrote:
> 
> > I see Josef's 86d4a77ba3dc4ace238a0556541a41df2bd71d49 introduced the
> > bitmaps list. I could try temporarily reverting this (some fixups needed)
> > if anybody thinks my cache bouncing idea might be slightly possible.
> 
> I'll try the attached and see how the profile changes.

Hmm, I bound the SMP affinity of all of the btrfs processes to one CPU,
and the page dirtying rate got slower, so I suspect the writes aren't
really a big deal, and the problem is just that there is way too much
walking going on after rsync has ran for a while and loads everything
into memory.

Any ideas?

Simon-
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