Re: [PATCH 0/5] mm subsystem refcounter conversions

Andrew Morton [off-list ref] wrote:

The performance implications of this proposal are terrifying.

I suggest adding a set of non-debug inlined refcount functions which
just fall back to the simple atomic.h operations.

And add a new CONFIG_DEBUG_REFCOUNT.  So the performance (and code
size!) with CONFIG_DEBUG_REFCOUNT=n is unaltered from present code. 
And make CONFIG_DEBUG_REFCOUNT suitably difficult to set.

I agree.  Refcounts are used in many performance-critical sites
within the network subsystem.

Thanks,
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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