Date: Thu, 15 Nov 2007 14:27:47 -0600 From: Kevin Kinsey <kdk@daleco.biz> To: questions@freebsd.org Cc: ccowart@rescomp.berkeley.edu Subject: Re: Kernel pty limit Message-ID: <473CABC3.6090604@daleco.biz> In-Reply-To: <20071115200215.GF43532@hal.rescomp.berkeley.edu> References: <20071115200215.GF43532@hal.rescomp.berkeley.edu>
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Christopher Cowart wrote: > Hello, > > I went to open up a new shell to our login server (recently rebuilt from > Debian to FreeBSD) and found problems allocating a new pty. With a > 256-pty limit, I'm surprised more people haven't had this problem. With > team of 8 SysAdmins, each leaving about 30 windows open in screen > sessions, 256 starts feeling a bit claustrophobic. Hmm, 8 guys root on one boxen? Sounds like a "cushy" job! Got an IP and a couple of partners I could play xtank with? J/k, of course. :-D > I found a questions thread from January 2006 and these PRs: > standards/90896: not enough PTYs in the FreeBSD > kern/25866: [patch] more than 256 ptys, up to 1302 ptys. > There was also discussion on hackers@ at the time[1], and a mention from rwatson@ that a new tty_pts.c and support in libc for this was added to HEAD then[2]; I haven't checked, but I'm assuming it's still in the new 7 branch and will be a part of 7.0 Real Soon Now(tm), if that's any comfort. There may be patches available, there was some discussion. Also, if it *IS* in 7.0, I guess you could holler for a MFC. > The latter appears to have been kicking around since FreeBSD 4.3 (still > open). > > What can I do to help get that limit raised? Does anyone have a patch > against 6.2? If not, would anyone be interested in writing one? > > Thanks for any help, > HTH, Kevin Kinsey -- Break into jail and claim police brutality. [1] http://unix.derkeiler.com/Mailing-Lists/FreeBSD/hackers/2006-01/msg00177.html [2] http://unix.derkeiler.com/Mailing-Lists/FreeBSD/hackers/2006-01/msg00306.html
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