Re: NFS client latencies

[Ingo Molnar <mingo@elte.hu>]

* Ingo Molnar <mingo@elte.hu> wrote:

> could you check the -41-23 -RT kernel at the usual place:
> 
>    http://redhat.com/~mingo/realtime-preempt/
> 
> i've added Trond's radix lookup code, plus the lockbreaker patch.
> 
> (one thing that is not covered yet is nfs_scan_list() - that still scans 
> a list. Trond, is that fixable too?)

ok, find a new latency trace attached (1.6 msecs). I generated write 
loads, and the nfs_scan_list_dirty() latency is gone and indeed 
nfs_scan_list() generates the worst latency - while processing 8535 
pages in one critical section.

	Ingo

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