Re: sunrpc/cache.c: races while updating cache entries

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On Fri, Apr 19, 2013 at 06:56:00PM +0200, Bodo Stroesser wrote:
> 
> We started the test of the -SP2 (and mainline) series on Tue, 9th, but had no
> success.
> We did _not_ find a problem with the patches, but under -SP2 our test scenario
> has less than 40% of the throughput we saw under -SP1. With that low
> performance, we had a 4 day run without any dropped RPC request. But we don't
> know the error rate without the patches under these conditions. So we can't
> give an o.k. for the patches yet.
> 
> Currently we try to find the reason for the different behavior of SP1 and SP2
> 

Hi,

sorry for the delay. Meanwhile we found the reason for the small throughput
with -SP2. The problem resulted from a change in our own software.

Thus I could fix this and started a test on last Tuesday. I stopped the test
today after 6 days without any lost RPC. Without the patches I saw the first
dropped RPC after 3 hours. Thus, I think the patches for -SP2 are fine. 

@Neil: would patch 0006 of the -SP1 patchset be a good additional change for
mainline?

Bodo
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