[8u20] RFR 8038212: Method::is_valid_method() check has performance regression impact for stackwalking

[Coleen Phillimore]

Thanks Markus and Harold.
Coleen

On 5/21/14, 3:07 PM, harold seigel wrote:
> Hi Coleen,
>
> Looks good to me, also.
>
> Harold
>
> On 5/21/2014 2:52 PM, Markus Grönlund wrote:
>> Looks good.
>>
>> Thanks
>> Markus
>>
>> -----Original Message-----
>> From: Coleen Phillimore
>> Sent: den 21 maj 2014 20:44
>> To: hotspot-dev developers
>> Subject: [8u20] RFR 8038212: Method::is_valid_method() check has 
>> performance regression impact for stackwalking
>>
>> Summary: Only prune metaspace virtual spaces at safepoint so walking 
>> them is safe outside a safepoint.
>>
>> This change has been in hs-rt for a week and backported cleanly. JFR 
>> performance in 8u20 needs this fix.
>>
>> open webrev at http://cr.openjdk.java.net/~coleenp/8038212_8u20/
>> bug link https://bugs.openjdk.java.net/browse/JDK-8038212
>>
>> Thanks,
>> Coleen
>