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

From One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Newsgroups linux.kernel
Subject Re: [PATCH] Add possibility to set /dev/tty number
Date 2016-01-06 15:00 +0100
Message-ID <qNWN4-1SF-25@gated-at.bofh.it> (permalink)
References (3 earlier) <qNgXx-6p8-33@gated-at.bofh.it> <qNimD-7d3-29@gated-at.bofh.it> <qNEGt-6GR-1@gated-at.bofh.it> <qNGIj-81C-37@gated-at.bofh.it> <qNVHk-1aT-11@gated-at.bofh.it>
Organization Intel Corporation

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> 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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Thread

[PATCH] Add possibility to set /dev/tty number Pierre Paul MINGOT <mingot.pierre@gmail.com> - 2016-01-04 16:40 +0100
  Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-04 16:50 +0100
    Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-04 18:00 +0100
      Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-04 18:20 +0100
        Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-04 19:50 +0100
          Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-05 00:00 +0100
            Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 14:20 +0100
              Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 16:30 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 16:40 +0100
              Re: [PATCH] Add possibility to set /dev/tty number Theodore Ts'o <tytso@mit.edu> - 2016-01-05 17:20 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 17:30 +0100
          Re: [PATCH] Add possibility to set /dev/tty number Pierre Paul MINGOT <mingot.pierre@gmail.com> - 2016-01-05 10:00 +0100
            Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 14:10 +0100
            Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 16:30 +0100
              Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 16:50 +0100
                Re: [PATCH] Add possibility to set /dev/tty number Greg KH <gregkh@linuxfoundation.org> - 2016-01-05 17:10 +0100
          Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-05 19:40 +0100
            Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-05 21:50 +0100
              Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 13:50 +0100
                Re: [PATCH] Add possibility to set /dev/tty number One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-01-06 15:00 +0100
                Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 15:10 +0100
  Re: [PATCH] Add possibility to set /dev/tty number "Austin S. Hemmelgarn" <ahferroin7@gmail.com> - 2016-01-06 14:50 +0100

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