On 08/15/2012 08:25 AM, Cyrill Gorcunov wrote:
> Hi Peter,
>
> that happened that in a sake of restoring ptys after checkpoint
> we need to create them with predefined indices, as they were at
> moment of dumping. So we have two options -- 1) Open terminals
> in sequence until needed index reached 2) Use some other way to
> say the kernel that some index is preferred.
>
> So I thought, would it be acceptible to provide such hint via
> sysctl, as in patch below (note I've not even compiled it yet,
> but would like to know your opinion early).
>
> (Maybe even make it one shot, thus once ida_get_new_above called
> the pty_next reset to zero).
>
Pardon me while I vomit... an interaction between sysctl and open? Talk
about a race condition from hell. It is stateful, and not connected to
the filesystem instance that it is supposed to be affecting. So no,
please don't. I understand your objective but it really needs to be
something attached to the pts filesystem instance in question.
-hpa
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