Re: How to enable more than 256 pty's?
On 2007-10-04 18:05, Vlad GALU <[EMAIL PROTECTED]> wrote:
>On 10/4/07, Giorgos Keramidas <[EMAIL PROTECTED]> wrote:
>>On 2007-10-02 15:41, Vlad GALU <[EMAIL PROTECTED]> wrote:
>>>On 10/2/07, Dag-Erling Sm?rgrav <[EMAIL PROTECTED]> wrote:
"Vlad GALU" <[EMAIL PROTECTED]> writes:
> The symptoms were exhibited even with rev. 1.16. I've CC'ed him so
> he can catch up with the thread.
Which symptoms? I can no longer reproduce the hang-on-close bug.
>>>
>>> Strangely enough, me neither. In his case, allocated pts' wouldn't
>>> get deallocated once the sessions ended.
>>
>> There was an old bug, which caused pts consumers to get stuck in
>> "devdrn". This has been fixed, AFAICT, a long time ago. At least, I
>> can't reproduce it any more with the usual tests:
>>
>> * Closing xterm windows.
>>
>> * Closing telnet sessions.
>>
>> * Exiting from screen(1) windows.
>
> Weird. 3 people on this thread already saw the symptoms :(
It must be a different problem, then. I used to have a local patch
which reverted the devdrn wait in kern_conf.c:destroy_devl() near
the lines:
753 while (dev->si_threadcount != 0) {
754 /* Use unique dummy wait ident */
755 msleep(&csw, &devmtx, PRIBIO, "devdrn", hz / 10);
756 }
but the original problem I was seeing seems to have been fixed.
At least, I can't reproduce it was easily anymore...
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Re: How to enable more than 256 pty's?
On 10/4/07, Giorgos Keramidas <[EMAIL PROTECTED]> wrote: > On 2007-10-02 15:41, Vlad GALU <[EMAIL PROTECTED]> wrote: > > On 10/2/07, Dag-Erling Sm?rgrav <[EMAIL PROTECTED]> wrote: > > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > > he can catch up with the thread. > > > > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > > > > Strangely enough, me neither. In his case, allocated pts' wouldn't > > get deallocated once the sessions ended. > > There was an old bug, which caused pts consumers to get stuck in > "devdrn". This has been fixed, AFAICT, a long time ago. At least, I > can't reproduce it any more with the usual tests: > > * Closing xterm windows. > > * Closing telnet sessions. > > * Exiting from screen(1) windows. > Weird. 3 people on this thread already saw the symptoms :( > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
On 2007-10-02 15:41, Vlad GALU <[EMAIL PROTECTED]> wrote: > On 10/2/07, Dag-Erling Sm?rgrav <[EMAIL PROTECTED]> wrote: > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > he can catch up with the thread. > > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > > Strangely enough, me neither. In his case, allocated pts' wouldn't > get deallocated once the sessions ended. There was an old bug, which caused pts consumers to get stuck in "devdrn". This has been fixed, AFAICT, a long time ago. At least, I can't reproduce it any more with the usual tests: * Closing xterm windows. * Closing telnet sessions. * Exiting from screen(1) windows. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
"Steven Hartland" <[EMAIL PROTECTED]> writes: > Thanks for the tip there but I cant find any function called pty_create_slave > in the source. Just grep your source tree for occurrences of pqrsPQRS. > Is this something that's possible on 5.x / 6.2 or something that will need a > lot of work? It shouldn't be any harder on 5.x / 6.x than on 7.x. DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
Thanks for the tip there but I cant find any function called pty_create_slave
in the source.
N.B. Machine is running 5.4 but I also looked on 6.2 which we could upgrade
to but still couldn't find it, so I assume you may be talking about something
that's in current which we couldn't risk on this machine.
Is this something that's possible on 5.x / 6.2 or something that will need a
lot of work?
Regards
Steve
- Original Message -
From: "Dag-Erling Smørgrav" <[EMAIL PROTECTED]>
You need to change the way ptys are named in pty_create_slave() and
pty_clone() in sys/kern/tty_pty.c. Just changing names won't help as
the sequence is also hardcoded in pty_clone().
You also need to change grantpt(), openpty() and any other userland code
which has hardcoded knowledge of the naming scheme:
[EMAIL PROTECTED] ~% gfs pqrsPQRS
src/sys/kern/tty_pty.c: static char *names = "pqrsPQRS";
src/sys/kern/tty_pty.c: * pts ==
/dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
src/sys/kern/tty_pty.c: * ptc ==
/dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
src/contrib/telnet/telnetd/sys_term.c: for (cp = "pqrsPQRS"; *cp; cp++) {
src/usr.sbin/ac/ac.c: strchr("pqrsPQRS",
usr.ut_line[3]) != 0 ||
src/lib/libutil/pty.c: for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
src/lib/libc/stdlib/grantpt.c: #define PT_DEV1 "pqrsPQRS"
Alternatively, set kern.pts.enable to 1, and find and fix the
hang-on-close bug in the pts code (if it hasn't been fixed already)
DES
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Re: How to enable more than 256 pty's?
Ed Schouten <[EMAIL PROTECTED]> writes: > This is a known issue IIRC. See line 245 of tty_pts.c 1.16. Can be > easily reproduced by killing the sshd while apps are still running in > the shell. It's not that simple. The question is why t_refcnt > 1 when there are no processes left attached to the tty. I managed to reproduce this as follows: $ script -q 1 script -q 2 script -q 3 script -q 4 tty if nothing else is going on at the same time, you should always see the same output, but instead you see a steadily increasing pts number. DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
* Ed Schouten <[EMAIL PROTECTED]> wrote: > * Vlad GALU <[EMAIL PROTECTED]> wrote: > > On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > > he can catch up with the thread. > > > > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > > > >Strangely enough, me neither. In his case, allocated pts' wouldn't > > get deallocated once the sessions ended. > > This is a known issue IIRC. See line 245 of tty_pts.c 1.16. Can be > easily reproduced by killing the sshd while apps are still running in > the shell. > > I thought we weren't able to destroy the device there, because you can't > destroy a TTY when it is used by an application (i.e. when it's the > controlling terminal). Thought about this 2 seconds after I sent my message: this is also responsible for the `zombie jails': tty's are made with make_dev_cred, which causes ucred's to be leaked, which eventually causes prisons to be leaked. -- Ed Schouten <[EMAIL PROTECTED]> WWW: http://g-rave.nl/ pgpyE20Dd6QGI.pgp Description: PGP signature
Re: How to enable more than 256 pty's?
On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > Dag-Erling Smørgrav <[EMAIL PROTECTED]> writes: > > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > > he can catch up with the thread. > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > > Strangely enough, me neither. In his case, allocated pts' wouldn't get > > deallocated once the sessions ended. > > Wouldn't get deallocated right away, or wouldn't get deallocated at all? > Apparently, it is not unusual for pts reclamation to be delayed a bit by > a non-zero refcnt. > As per my other mail, they wouldn't get deallocated at all. They still show up in /dev/pts/ even after closing, and the next integer index is picked up upon the next terminal creation. > DES > -- > Dag-Erling Smørgrav - [EMAIL PROTECTED] > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
* Vlad GALU <[EMAIL PROTECTED]> wrote: > On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > he can catch up with the thread. > > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > >Strangely enough, me neither. In his case, allocated pts' wouldn't > get deallocated once the sessions ended. This is a known issue IIRC. See line 245 of tty_pts.c 1.16. Can be easily reproduced by killing the sshd while apps are still running in the shell. I thought we weren't able to destroy the device there, because you can't destroy a TTY when it is used by an application (i.e. when it's the controlling terminal). -- Ed Schouten <[EMAIL PROTECTED]> WWW: http://g-rave.nl/ pgpIkLIgzEu2i.pgp Description: PGP signature
Re: How to enable more than 256 pty's?
On 10/2/07, Vlad GALU <[EMAIL PROTECTED]> wrote: > On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > he can catch up with the thread. > > > > Which symptoms? I can no longer reproduce the hang-on-close bug. > >Strangely enough, me neither. In his case, allocated pts' wouldn't > get deallocated once the sessions ended. > > However, I see that, if I use pts/0-7, for instance, then log off pts/7, the next assigned pts will be pts/8. Is this expected? I tried lowering kern.pts.max to 20. If I open 20 of them and close them afterwards, on the next try I get "no more ptys" from my screen. > > DES > > -- > > Dag-Erling Smørgrav - [EMAIL PROTECTED] > > > > > -- > If it's there, and you can see it, it's real. > If it's not there, and you can see it, it's virtual. > If it's there, and you can't see it, it's transparent. > If it's not there, and you can't see it, you erased it. > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
"Vlad GALU" <[EMAIL PROTECTED]> writes: > Dag-Erling Smørgrav <[EMAIL PROTECTED]> writes: > > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > > he can catch up with the thread. > > Which symptoms? I can no longer reproduce the hang-on-close bug. > Strangely enough, me neither. In his case, allocated pts' wouldn't get > deallocated once the sessions ended. Wouldn't get deallocated right away, or wouldn't get deallocated at all? Apparently, it is not unusual for pts reclamation to be delayed a bit by a non-zero refcnt. DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > "Vlad GALU" <[EMAIL PROTECTED]> writes: > > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > > he can catch up with the thread. > > Which symptoms? I can no longer reproduce the hang-on-close bug. Strangely enough, me neither. In his case, allocated pts' wouldn't get deallocated once the sessions ended. > > DES > -- > Dag-Erling Smørgrav - [EMAIL PROTECTED] > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
"Vlad GALU" <[EMAIL PROTECTED]> writes: > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so > he can catch up with the thread. Which symptoms? I can no longer reproduce the hang-on-close bug. DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote:
> "Steven Hartland" <[EMAIL PROTECTED]> writes:
> > Any one got any pointers on this, the machine we running this app on is over
> > 90% idle so I really don't want to have to install a second machine just to
> > workaround a limit on the number of pty's, surely there's a way to increase
> > this?
>
> You need to change the way ptys are named in pty_create_slave() and
> pty_clone() in sys/kern/tty_pty.c. Just changing names won't help as
> the sequence is also hardcoded in pty_clone().
>
> You also need to change grantpt(), openpty() and any other userland code
> which has hardcoded knowledge of the naming scheme:
>
> [EMAIL PROTECTED] ~% gfs pqrsPQRS
> src/sys/kern/tty_pty.c: static char *names = "pqrsPQRS";
> src/sys/kern/tty_pty.c: * pts ==
> /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
> src/sys/kern/tty_pty.c: * ptc ==
> /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
> src/contrib/telnet/telnetd/sys_term.c: for (cp = "pqrsPQRS"; *cp; cp++) {
> src/usr.sbin/ac/ac.c: strchr("pqrsPQRS",
> usr.ut_line[3]) != 0 ||
> src/lib/libutil/pty.c: for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
> src/lib/libc/stdlib/grantpt.c: #define PT_DEV1 "pqrsPQRS"
>
> Alternatively, set kern.pts.enable to 1, and find and fix the
> hang-on-close bug in the pts code (if it hasn't been fixed already)
Looks like it hasn't been. A friend who tried to set up an access
server for his company stumbled upon it.
>
> DES
> --
> Dag-Erling Smørgrav - [EMAIL PROTECTED]
> ___
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>
--
If it's there, and you can see it, it's real.
If it's not there, and you can see it, it's virtual.
If it's there, and you can't see it, it's transparent.
If it's not there, and you can't see it, you erased it.
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Re: How to enable more than 256 pty's?
On 10/2/07, Vlad GALU <[EMAIL PROTECTED]> wrote: > On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > > Vlad GALU <[EMAIL PROTECTED]> writes: > > > Dag-Erling Smørgrav <[EMAIL PROTECTED]> writes: > > > > Alternatively, set kern.pts.enable to 1, and find and fix the > > > > hang-on-close bug in the pts code (if it hasn't been fixed already) > > > Looks like it hasn't been. A friend who tried to set up an access > > > server for his company stumbled upon it. > > > > kib@ says it has as of sys/kern/tty_pts.c rev 1.15 (2007-07-03). Has > > your friend tried with a sufficiently recent kernel? > >I can't tell for sure, he tried a week or two ago, with a recent > snapshot. I forwarded him your mail, I hope he'll retry and get back > to me. > The symptoms were exhibited even with rev. 1.16. I've CC'ed him so he can catch up with the thread. > > > > DES > > -- > > Dag-Erling Smørgrav - [EMAIL PROTECTED] > > > > > -- > If it's there, and you can see it, it's real. > If it's not there, and you can see it, it's virtual. > If it's there, and you can't see it, it's transparent. > If it's not there, and you can't see it, you erased it. > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
"Steven Hartland" <[EMAIL PROTECTED]> writes:
> Any one got any pointers on this, the machine we running this app on is over
> 90% idle so I really don't want to have to install a second machine just to
> workaround a limit on the number of pty's, surely there's a way to increase
> this?
You need to change the way ptys are named in pty_create_slave() and
pty_clone() in sys/kern/tty_pty.c. Just changing names won't help as
the sequence is also hardcoded in pty_clone().
You also need to change grantpt(), openpty() and any other userland code
which has hardcoded knowledge of the naming scheme:
[EMAIL PROTECTED] ~% gfs pqrsPQRS
src/sys/kern/tty_pty.c: static char *names = "pqrsPQRS";
src/sys/kern/tty_pty.c: * pts ==
/dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
src/sys/kern/tty_pty.c: * ptc ==
/dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
src/contrib/telnet/telnetd/sys_term.c: for (cp = "pqrsPQRS"; *cp; cp++) {
src/usr.sbin/ac/ac.c: strchr("pqrsPQRS",
usr.ut_line[3]) != 0 ||
src/lib/libutil/pty.c: for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
src/lib/libc/stdlib/grantpt.c: #define PT_DEV1 "pqrsPQRS"
Alternatively, set kern.pts.enable to 1, and find and fix the
hang-on-close bug in the pts code (if it hasn't been fixed already)
DES
--
Dag-Erling Smørgrav - [EMAIL PROTECTED]
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Re: How to enable more than 256 pty's?
On 10/2/07, Dag-Erling Smørgrav <[EMAIL PROTECTED]> wrote: > Vlad GALU <[EMAIL PROTECTED]> writes: > > Dag-Erling Smørgrav <[EMAIL PROTECTED]> writes: > > > Alternatively, set kern.pts.enable to 1, and find and fix the > > > hang-on-close bug in the pts code (if it hasn't been fixed already) > > Looks like it hasn't been. A friend who tried to set up an access > > server for his company stumbled upon it. > > kib@ says it has as of sys/kern/tty_pts.c rev 1.15 (2007-07-03). Has > your friend tried with a sufficiently recent kernel? I can't tell for sure, he tried a week or two ago, with a recent snapshot. I forwarded him your mail, I hope he'll retry and get back to me. > > DES > -- > Dag-Erling Smørgrav - [EMAIL PROTECTED] > -- If it's there, and you can see it, it's real. If it's not there, and you can see it, it's virtual. If it's there, and you can't see it, it's transparent. If it's not there, and you can't see it, you erased it. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
On Tue, Oct 02, 2007 at 02:05:03PM +0200, Dag-Erling Smørgrav wrote:
> "Steven Hartland" <[EMAIL PROTECTED]> writes:
> > Any one got any pointers on this, the machine we running this app on is over
> > 90% idle so I really don't want to have to install a second machine just to
> > workaround a limit on the number of pty's, surely there's a way to increase
> > this?
>
> You need to change the way ptys are named in pty_create_slave() and
> pty_clone() in sys/kern/tty_pty.c. Just changing names won't help as
> the sequence is also hardcoded in pty_clone().
>
> You also need to change grantpt(), openpty() and any other userland code
> which has hardcoded knowledge of the naming scheme:
>
> [EMAIL PROTECTED] ~% gfs pqrsPQRS
> src/sys/kern/tty_pty.c: static char *names = "pqrsPQRS";
> src/sys/kern/tty_pty.c: * pts ==
> /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
> src/sys/kern/tty_pty.c: * ptc ==
> /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
> src/contrib/telnet/telnetd/sys_term.c: for (cp = "pqrsPQRS"; *cp; cp++) {
> src/usr.sbin/ac/ac.c: strchr("pqrsPQRS",
> usr.ut_line[3]) != 0 ||
> src/lib/libutil/pty.c: for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
> src/lib/libc/stdlib/grantpt.c: #define PT_DEV1 "pqrsPQRS"
>
> Alternatively, set kern.pts.enable to 1, and find and fix the
> hang-on-close bug in the pts code (if it hasn't been fixed already)
This last option is only available if you are running 7-CURRENT though.
The pts code is not in 6-STABLE (or older.)
--
Erik Trulsson
[EMAIL PROTECTED]
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Re: How to enable more than 256 pty's?
Vlad GALU <[EMAIL PROTECTED]> writes: > Dag-Erling Smørgrav <[EMAIL PROTECTED]> writes: > > Alternatively, set kern.pts.enable to 1, and find and fix the > > hang-on-close bug in the pts code (if it hasn't been fixed already) > Looks like it hasn't been. A friend who tried to set up an access > server for his company stumbled upon it. kib@ says it has as of sys/kern/tty_pts.c rev 1.15 (2007-07-03). Has your friend tried with a sufficiently recent kernel? DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: How to enable more than 256 pty's?
Any one got any pointers on this, the machine we running this app on is over 90% idle so I really don't want to have to install a second machine just to workaround a limit on the number of pty's, surely there's a way to increase this? Regards Steve This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to [EMAIL PROTECTED] ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: More than 256 pty's
On 17 Feb 2001 17:49:10 +0100
Cyrille Lefevre <[EMAIL PROTECTED]> wrote:
Seems to take it up to 704 ptys (now try explaining quickly how *that*
number comes up). Don't you also need to disable the test in ptsopen() on
line 189 of kern/tty_pty.c ? viz:
-
if (minr < 255) {
nextdev = makedev(major(dev), minr + 1);
if (!nextdev->si_drv1) {
ptyinit(minr + 1);
}
}
-
I was contemplating something with a /dev/pty/* and /dev/tty/* and
a really mindless naming convention that wouldn't ever bottom out. I hadn't
even started working on it.
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Re: More than 256 pty's
On Fri, 16 Feb 2001 17:28:54 + Robert bobb Crosbie <[EMAIL PROTECTED]> wrote: RC> RC> You can have more than 256 ptys; the problem is what to name them. You RC> can easily get 384 ptys by extending the current scheme slightly (using RC> /dev/tty[tuTU]*; /dev/ttyv* is syscons so we hit our limit with this RC> naming scheme). Edit /dev/MAKEDEV and /usr/src/lib/libutil/pty.c RC> It looks to me like you also have to hack around in kern/tty_pty.c, there are hard coded assumptions in there about 256 minor numbers being mapped. Also comments about doing something about it, the mapping is defined in there. Making it work above 256 doesn't look hard, agreeing on a naming convention might be harder :) To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-stable" in the body of the message
More than 256 pty's
Hey, I'm currently running into difficulties on a multiuser system, (4.2-STABLE) we have 256 pty's (for some reason we still have pseudo-device pty 256, in the kernel conf...), and we are running out. Last year we ran into the same problem (February seems to be a busy month) and I believe that we followed the instructions in http://www.FreeBSD.org/cgi/getmsg.cgi?fetch=8198069+8200098+/usr/local/www/db/text/1999/freebsd-questions/19990607.freebsd-questions You can have more than 256 ptys; the problem is what to name them. You can easily get 384 ptys by extending the current scheme slightly (using /dev/tty[tuTU]*; /dev/ttyv* is syscons so we hit our limit with this naming scheme). Edit /dev/MAKEDEV and /usr/src/lib/libutil/pty.c However, I can't remember what we did (if we did at all) to MAKEDEV to overcome the 256 minor number limit. Can anyone help us out ? What is the possibility of creating more than 256 pty/tty devices ? If not, are there any plans to overcome this hard limit in the future ? Cheers, - bobb -- Oft it may chance that old wives keep in memory word of things that once were needful for the wise to know. - Celeborn To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-stable" in the body of the message
