Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: CONFIG_UNIX98_PTY_COUNT and devfs | Date | 17 Dec 2003 19:24:27 -0800 |
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Followup to: <Pine.LNX.4.58.0312170131500.397@pervalidus.dyndns.org> By author: =?ISO-8859-1?Q?Fr=E9d=E9ric_L=2E_W=2E_Meunier?= <1@pervalidus.net> 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.
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