lkml.org 
[lkml]   [2017]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/5] mm subsystem refcounter conversions
Andrew Morton <akpm@linux-foundation.org> 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 <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

\
 
 \ /
  Last update: 2017-03-18 18:11    [W:1.414 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site