[PATCH v2 1/5] winevulkan: Support prefixing function parameters.

[Rémi Bernon]

On 12/10/21 18:10, Zebediah Figura wrote:
> One possible optimization that Paul and I had discussed a while back was 
> to allow for the possibility of "masked" or "uninterruptible" syscalls, 
> that is, syscalls that cannot be directly interrupted with 
> SuspendThread(). The idea is that instead of saving the whole 
> nonvolatile context up front, you instead set a flag in the syscall 
> dispatcher (when SIGUSR1 is received) that tells the restore path to 
> save the whole context and break into the suspend handler.
> 
> This would only be usable for calls which don't sleep (or don't sleep 
> for a meaningful amount of time), but as I understand that could include 
> most Vulkan calls, including vkUpdateDescriptorSets and other important 
> ones.
> 

I think we should have that kind of optimization, and a better 
understanding of the xsavec64 issue and mitigation, before adding 
syscall overhead to more functions. Especially when we don't have a very 
clear view on on how they are used.

-- 
Rémi Bernon <rbernon at codeweavers.com>