Re: [PATCH] Add possibility to set /dev/tty number

From: One Thousand Gnomes
Date: Wed Jan 06 2016 - 08:54:55 EST


> In fact, there already appears to be some degree of allocation on demand
> for VT's (otherwise deallocvt has no point), just not for everything
> associated with the VT. I'd be willing to bet that almost everything
> that reasonably can be dynamically allocated already is, there is a bare
> minimum required for even a virtual device after all.

If there is 1.6K overhead per vt coming from somewhere (given we only
preallocate 1 VT) then either

- There is stuff not being dynamically allocated (which you can find and
fix)

- Your userspace is triggering those dynamic allocations

There is no magic thing that requires 1.6K of kernel data per console.

Alan
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