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From Ruediger Pluem <rpl...@apache.org>
Subject Re: svn commit: r808212 - in /httpd/httpd/trunk: CHANGES docs/manual/mod/mod_cache.xml modules/cache/cache_storage.c modules/cache/cache_util.c modules/cache/mod_cache.c modules/cache/mod_cache.h
Date Thu, 27 Aug 2009 19:30:58 GMT


On 08/27/2009 12:46 AM, minfrin@apache.org wrote:
> Author: minfrin
> Date: Wed Aug 26 22:46:35 2009
> New Revision: 808212
> 
> URL: http://svn.apache.org/viewvc?rev=808212&view=rev
> Log:
> mod_cache: Introduce the thundering herd lock, a mechanism to keep
> the flood of requests at bay that strike a backend webserver as
> a cached entity goes stale.
> 
> Modified:
>     httpd/httpd/trunk/CHANGES
>     httpd/httpd/trunk/docs/manual/mod/mod_cache.xml
>     httpd/httpd/trunk/modules/cache/cache_storage.c
>     httpd/httpd/trunk/modules/cache/cache_util.c
>     httpd/httpd/trunk/modules/cache/mod_cache.c
>     httpd/httpd/trunk/modules/cache/mod_cache.h


Some new compiler warnings that result from the patch:


mod_cache.c: In function 'cache_url_handler':
mod_cache.c:114: warning: unused variable 'key'
cache_util.c: In function 'ap_cache_try_lock':
cache_util.c:243: warning: suggest parentheses around && within ||
cache_util.c: In function 'ap_cache_remove_lock':
cache_util.c:307: warning: unused variable 'path'

Regards

RĂ¼diger


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