Re: CONFIG_UNIX98_PTY_COUNT and devfs

[H. Peter Anvin]

Followup to:  <Pine.LNX.4.58.0312170131500.397@xxxxxxxxxxxxxxxxxxxxx>
By author:    =?ISO-8859-1?Q?Fr=E9d=E9ric_L=2E_W=2E_Meunier?= <1@xxxxxxxxxxxxxx>
In newsgroup: linux.dev.kernel
>
> I used CONFIG_UNIX98_PTY_COUNT=32 and it created
> /dev/pty/m[0-255]. Is there any way to make devfs only create
> /dev/pty/m[0-31] ?
> 
> From Configure.help:
> 
> "When not in use, each additional set of 256 PTYs occupy
> approximately 8 KB of kernel memory on 32-bit architectures."
> 
> Does that mean it doesn't make any difference if I set
> CONFIG_UNIX98_PTY_COUNT=1 or CONFIG_UNIX98_PTY_COUNT=256, and
> ONFIG_UNIX98_PTY_COUNT=257 will create 512 entries ?
> 

This has absolutely nothing to do with devfs, but Unix98 PTYs
currently come in packs of 256.

	-hpa
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