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https://issues.apache.org/jira/browse/TS-1891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655589#comment-13655589
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Yunkai Zhang edited comment on TS-1891 at 5/12/13 6:02 PM:
-----------------------------------------------------------
[~jamespeach]:
1) Use a char refcount instead of a single bit, just for easy implementation --
there are no bit array in C/C++(The std::bitset is too slow for us, std::bitset
is eight times less than the smallest elemental type in C++: char, see:
http://www.cplusplus.com/reference/bitset/bitset/). Use char array is simple
and fast to access.
2) The original freelist has had double-free checking feature.
3) Use option for performance reason:
3.1) the option can be updated online by traffic_line -x. So it's easy to
use. And
3.2) in the original freelist, the double-free checking is also disable by
default.
was (Author: yunkai):
[~jamespeach]:
1) Use a char refcount instead of a single bit, just for easy implementation --
there are no bit array in C/C++. Use char array is simple and fast to access.
2) The original freelist has had double-free checking feature.
3) Use option for performance reason:
3.1) the option can be updated online by traffic_line -x. So it's easy to
use. And
3.2) in the original freelist, the double-free checking is also disable by
default.
> Add double-free checking for reclaimable freelist
> -------------------------------------------------
>
> Key: TS-1891
> URL: https://issues.apache.org/jira/browse/TS-1891
> Project: Traffic Server
> Issue Type: New Feature
> Components: Core
> Reporter: Yunkai Zhang
> Attachments:
> 0001-Add-double-free-checking-for-reclaimable-freelist-V2.patch
>
>
> double-free checking is very useful for us to analyze memory issues.
> So, I introduce this feature to recalimable freelist.
> The double-free checking for reclaimable freelist is disable by default,
> users can enable it by setting the following option in records.config:
> {code}
> CONFIG proxy.config.allocator.check_double_free INT 1
> {code}
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