Re: [Qemu-devel] [PATCH] atomics: add volatile_read/volatile_set

[Paolo Bonzini]

On 18/07/2016 21:04, Sergey Fedorov wrote:
> How much performance do we really need and how much performance can we
> loose introducing such a flag? We should yet gain something reducing
> tb_lock contention. Maybe it is worthwhile to use a dedicated flag to
> keep code more clear? There's always a question of balance between code
> structure and maintainability (future of the TCG) on one hand and
> performance (present of the TCG) on the other hand.

Fair enough, can you send a patch that does this?  If we can do the
check only just before tb_add_jump, indeed there's no reason to do all
the mess with invalid state.

Paolo