From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: CONFIG_UNIX98_PTY_COUNT and devfs
Date: 17 Dec 2003 19:24:27 -0800 [thread overview]
Message-ID: <brr6lb$ev$1@cesium.transmeta.com> (raw)
In-Reply-To: Pine.LNX.4.58.0312170131500.397@pervalidus.dyndns.org
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.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
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"Unix gives you enough rope to shoot yourself in the foot."
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prev parent reply other threads:[~2003-12-18 3:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-17 3:37 CONFIG_UNIX98_PTY_COUNT and devfs Frédéric L. W. Meunier
2003-12-18 3:24 ` H. Peter Anvin [this message]
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