Re: [Qemu-devel] [PATCH 1/4] linux-user: add pselect syscall

[Paul Brook]

>This patch adds support for the pselect syscall in linux-user emulation
>and also adds several support functions required to translate the
>timespec structs between the target and the host.

IIUC the whole point of the pselect is that it should be atomic. By emulating 
this in a non-atomic fasion I think you're re-introducing the race condition 
that it is designed to avoid.

Wouldn't it be better to just return ENOSYS and let the guest deal with the 
problem?

Paul