[PATCH] nscd: bump GC cycle during cache pruning (bug 26130)

[Carlos O'Donell]

On 6/29/20 10:09 AM, Andreas Schwab wrote:
> On Jun 29 2020, Florian Weimer via Libc-alpha wrote:
> 
>> * Andreas Schwab:
>>
>>> On Jun 29 2020, Florian Weimer wrote:
>>>
>>>> I think this needs barriers after and before the increments.
>>>
>>> Why doesn't gc need those barriers?
>>
>> I think it needs them as well.  I thought we had them there. 8-(
> 
> Should they use atomic_increment?

There are many concurrency problems with the cache, and we do see
these issues with downstream customers. Torvald reviewed this at
one point and produced a patch that I've attached to bug 25888.

Our latest attempt to fix this is here:
https://sourceware.org/bugzilla/show_bug.cgi?id=25888
https://sourceware.org/bugzilla/attachment.cgi?id=12493

-- 
Cheers,
Carlos.