From: Matt Mackall <mpm@selenic.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
tytso@thunk.org, William Lee Irwin III <wli@holomorphy.com>
Subject: Re: Updated dynamic pty patch available
Date: Sat, 14 Feb 2004 17:37:58 -0600 [thread overview]
Message-ID: <20040214233758.GD26247@waste.org> (raw)
In-Reply-To: <402B168E.4020000@zytor.com>
On Wed, Feb 11, 2004 at 10:00:46PM -0800, H. Peter Anvin wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/dynpty-test-2.patch
>
> ... against the current top-of-bkcvs 2.6 kernel.
>
> This version of the patch makes *both* legacy and Unix98 ptys configure
> options (Unix98 only if EMBEDDED), and the number of legacy ptys is a
> configuration option -- useful if you want to reduce the memory
> footprint, or if you really wants lots of these guys (256 is no longer a
> hard limit.)
>
> Additionally, I have added a sysctl option -- /proc/sys/kernel/pty/max
> -- for limiting the number of Unix98 ptys. It was way too effective a
> DoS to eat up all kernel memory by opening /dev/ptmx repeatedly. The
> default is 4096, but it can be adjusted all the way up to 2^20 if desirable.
Looks good, I'll drop this into -tiny when I have proper net access
again.
--
Matt Mackall : http://www.selenic.com : Linux development and consulting
prev parent reply other threads:[~2004-02-14 23:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-12 6:00 Updated dynamic pty patch available H. Peter Anvin
2004-02-12 10:48 ` William Lee Irwin III
2004-02-13 15:37 ` Valdis.Kletnieks
2004-02-14 23:37 ` Matt Mackall [this message]
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