Bug 125772
| Summary: | Increasing the number of ptys based on the FAQ results compilation error on FreeBSD 7.0 | ||||||||
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| Product: | Documentation | Reporter: | Unga <unga888> | ||||||
| Component: | Books & Articles | Assignee: | Gabor Pali <pgj> | ||||||
| Status: | Closed FIXED | ||||||||
| Severity: | Affects Only Me | ||||||||
| Priority: | Normal | ||||||||
| Version: | Latest | ||||||||
| Hardware: | Any | ||||||||
| OS: | Any | ||||||||
| Attachments: |
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Description
Unga
2008-07-19 16:30:00 UTC
Responsible Changed From-To: freebsd-doc->pgj I think it is my fault, so I should fix this. > This results a compilation error:
> config: /usr/src/sys/i386/conf/GENERIC:268: syntax error
> *** Error code 1
Yeah, that approach (number in config file) hasn't been used since at least
3.x. The default on 7.0 is 512 pty's (vs 256 in 6.x). Do you need more than
that?
--
John Baldwin
Here is a patch based on what we have discussed earlier. On Wednesday 23 July 2008 02:03:33 pm Gabor PALI wrote:
> Here is a patch based on what we have discussed earlier.
>
A few wording suggestions:
I would s/will probably run out/might run out/ since on newer snaps there are
more pty's so this is less of an issue. Also, you can use the approach in
the pty_1152.patch w/o too much trouble on any 5.x+ system. The patch is
just slightly more cumbersome on 6.2 and older releases. Based on all that,
I would actually reword much of this to go something like this:
<para>
If you have a lot of telnet, ssh, X, or screen users, you might run out of
pseudoterminals. By default, &os; 6.2 and earlier support 256
pseudoterminals, while &os; 6.3 and later support 512 pseudoterminals.
<para>
I would then keep the <tip> that you have, but possibly mention that the patch
will only apply cleanly to 6.3 or later.
--
John Baldwin
John Baldwin wrote:
> A few wording suggestions [..] I would then keep the <tip> that you
> have, but possibly mention that the patch will only apply cleanly to
> 6.3 or later.
Here is the updated patch according to your request.
--- On Mon, 7/21/08, John Baldwin <jhb@freebsd.org> wrote: > From: John Baldwin <jhb@freebsd.org> > Subject: Re: docs/125772: Increasing the number of ptys based on the FAQ results compilation error on FreeBSD 7.0 > To: freebsd-doc@freebsd.org > Cc: "Unga" <unga888@yahoo.com>, freebsd-gnats-submit@freebsd.org > Date: Monday, July 21, 2008, 11:21 PM > On Saturday 19 July 2008 11:25:47 am Unga wrote: > > > > >Number: 125772 > > >Category: docs > > >Synopsis: Increasing the number of ptys > based on the FAQ results > compilation error on FreeBSD 7.0 > > >Confidential: no > > >Severity: serious > > >Priority: low > > >Responsible: freebsd-doc > > >State: open > > >Quarter: > > >Keywords: > > >Date-Required: > > >Class: doc-bug > > >Submitter-Id: current-users > > >Arrival-Date: Sat Jul 19 15:30:00 UTC 2008 > > >Closed-Date: > > >Last-Modified: > > >Originator: Unga > > >Release: FreeBSD 7.0 > > >Organization: > > >Environment: > > >Description: > > As per FAQ, > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/admin.html, > > I tried to increase the number of ptys: > > "10.19.1 > > Build and install a new kernel with the line in the > > configuration file: > > device pty N > > where N is the number of requested > pseudoterminals." > > > > I tried to recompile the kernel. I have modified the > > GENERIC as follows: > > device pty 64 # Pseudo-ttys (telnet > etc) > > > > This results a compilation error: > > config: /usr/src/sys/i386/conf/GENERIC:268: syntax > error > > *** Error code 1 > > Yeah, that approach (number in config file) hasn't been > used since at least > 3.x. The default on 7.0 is 512 pty's (vs 256 in 6.x). > Do you need more than > that? > Hi Thanks for the reply. Its a shame on top the FAQ page shows "Frequently Asked Questions for FreeBSD 6.X and 7.X" and information is applicable for FreeBSD 3.x. My issue was when I run expect -c "spawn ls", I get "The system has no more ptys. Ask your system administrator to create more.". Later I identified its was pt_chown was missing in my system caused to display this misleading error message. The default on 7.0 is 512 pty's should be most probably enough. But I have proposal as follows: 1) Default number of pty's 512. 2) Give the option to increase to a new *hard limit* by recompiling the kernel as explained in the FAQ. 3) Give a sysctl option to soft increase the pty limit up to the *hard limit*. Thank you. Best regards Unga On Wednesday 23 July 2008 11:21:58 pm Unga wrote: > --- On Mon, 7/21/08, John Baldwin <jhb@freebsd.org> wrote: > > > From: John Baldwin <jhb@freebsd.org> > > Subject: Re: docs/125772: Increasing the number of ptys based on the FAQ results compilation error on FreeBSD 7.0 > > To: freebsd-doc@freebsd.org > > Cc: "Unga" <unga888@yahoo.com>, freebsd-gnats-submit@freebsd.org > > Date: Monday, July 21, 2008, 11:21 PM > > On Saturday 19 July 2008 11:25:47 am Unga wrote: > > > > > > >Number: 125772 > > > >Category: docs > > > >Synopsis: Increasing the number of ptys > > based on the FAQ results > > compilation error on FreeBSD 7.0 > > > >Confidential: no > > > >Severity: serious > > > >Priority: low > > > >Responsible: freebsd-doc > > > >State: open > > > >Quarter: > > > >Keywords: > > > >Date-Required: > > > >Class: doc-bug > > > >Submitter-Id: current-users > > > >Arrival-Date: Sat Jul 19 15:30:00 UTC 2008 > > > >Closed-Date: > > > >Last-Modified: > > > >Originator: Unga > > > >Release: FreeBSD 7.0 > > > >Organization: > > > >Environment: > > > >Description: > > > As per FAQ, > > > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/admin.html, > > > I tried to increase the number of ptys: > > > "10.19.1 > > > Build and install a new kernel with the line in the > > > configuration file: > > > device pty N > > > where N is the number of requested > > pseudoterminals." > > > > > > I tried to recompile the kernel. I have modified the > > > GENERIC as follows: > > > device pty 64 # Pseudo-ttys (telnet > > etc) > > > > > > This results a compilation error: > > > config: /usr/src/sys/i386/conf/GENERIC:268: syntax > > error > > > *** Error code 1 > > > > Yeah, that approach (number in config file) hasn't been > > used since at least > > 3.x. The default on 7.0 is 512 pty's (vs 256 in 6.x). > > Do you need more than > > that? > > > > Hi > > Thanks for the reply. Its a shame on top the FAQ page shows "Frequently Asked Questions for FreeBSD 6.X and 7.X" and information is applicable for FreeBSD 3.x. > > My issue was when I run expect -c "spawn ls", I get "The system has no more ptys. Ask your system administrator to create more.". Later I identified its was pt_chown was missing in my system caused to display this misleading error message. > > The default on 7.0 is 512 pty's should be most probably enough. But I have proposal as follows: > > 1) Default number of pty's 512. > > 2) Give the option to increase to a new *hard limit* by recompiling the kernel as explained in the FAQ. > > 3) Give a sysctl option to soft increase the pty limit up to the *hard limit*. > > Thank you. pgj@ is working on a patch to update the documentation. As far as changing the code, pgj's patch will explain how to update the hard limit. However, there currently isn't any sort of soft limit, and given that all the pty stuff is being rewritten in 8.x to be centered on pts(4), it is doubtful that there ever will be a soft limit via sysctl (except that pts(4) effectively only has a "soft" limit where the hard limit is the amount of RAM you have). -- John Baldwin pgj 2008-07-29 18:11:32 UTC
FreeBSD doc repository
Modified files:
en_US.ISO8859-1/books/faq book.sgml
Log:
Update Question 10.19.1:
- Replace the old kernel configuration method
with some info on the current limits and
mention jhb's patch
PR: docs/125772
Submitted by: Unga <unga888 (at) yahoo (dot) com>
Discussed with: rwatson, jhb
Reviewed by: jhb, gabor
Approved by: gabor
Revision Changes Path
1.1079 +15 -38 doc/en_US.ISO8859-1/books/faq/book.sgml
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State Changed From-To: open->closed A patch was created and committed to solve your problem. Thank you for your submission! |
