RFR: 8079315: UseCondCardMark broken in conjunction with CMS precleaning (original) (raw)

Erik Österlund erik.osterlund at lnu.se
Tue Jun 2 08:17:47 UTC 2015

Hi Andrew,

Unfortunately it looks like the global_fence performance and portability discussion led the thread to a halt.

I don¹t think a correctness patch should be held back by a discussion about which platforms can elide the correctness fix and potentially experience better performance. So I think we should just go for the fencing solution for now, and discuss global_fence later if anyone is interested and think it¹s worth doing and on which platforms it makes sense for etc.

The suggestion with fences look good from my point of view. But I¹m only an author.

Cheers, /Erik

Den 02/06/15 09:44 skrev Andrew Haley <aph at redhat.com>:

Have we come to a complete standstill?

We have a number of AArch64 patches, needed for correctness, which are blocked on this. But part of the simple AArch64 fix, which would be a StoreLoad barrier, requires a change to shared code. I could submit something #ifdef AARCH64, which probably wouldn't be popular. Andrew.

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