timerfd in FreeBSD jail?

[Grzegorz Junka]

On 06/09/2016 14:07, Martin "eto" Misuth wrote:
> On Tue, 6 Sep 2016 13:19:13 +0000
> Grzegorz Junka <list1 at gjunka.com> wrote:
>> OK, I was hoping that this is similar to creating ping sockets in jail,
>> that it needs to be enabled on the host for jail to actually be able to
>> execute ping.
> Well unfortunately that is not the case, as you see.
>
>> How would I know that this is not implemented in the linux
>> emulation layer rather than disabled on the host?
> I would be interested in resource documenting emulated Linux syscall table
> (on wiki perhaps) myself, maybe it is buried somewhere in the docs, but I
> haven't found it yet.
>
> Supposedly SmartOS has similar emulator which is much more recent, I wonder
> if FreeBSD masters could reuse some stuff from them. Seems Like emu is
> not really top priority (as in supporting most recent stuffs) for FreeBSD
> project right now.
>
>> And yes, I have the linux environment enabled and set up in the jail and
>> it mostly works fine. But I didn't put it under any stress yet. I will
>> see if the dart-sdk package can be somehow compiled without the timer_fd
>> options.
> Third option, if you have time and willforce, is to ditch jail altogether, and
> to try running your CentOS install in bhyve hypervisor. That way you will lose
> some cycles in emulation, but as full virtual computer is provided, resulting
> CentOS install should work same as in any other VM.
>
> On the bright side you can then unload Linux emulation kernel modules from host.
>
>    eto
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I was planning to use bhyve but it wants to consume an up-front 
specified amount of hard drive and memory. I am running the emulation on 
my laptop with 4GB or RAM and have only limited amount of SSD disk 
available, so running a jail was much lighter on resources.
Grzegorz