Date: 12 Jun 2003 11:10:15 -0400 From: Mark Evenson <evenson@panix.com> To: current@freebsd.org Subject: Re: sh job control Message-ID: <a0y907jprc.fsf@panix3.panix.com> In-Reply-To: <20030612033123.GQ26927@survey.codeburst.net> References: <20030612033123.GQ26927@survey.codeburst.net>
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Paul Richards <paul@freebsd-services.com> writes:
> I've installed a current built last night and job control no longer
> works in /bin/sh or /usr/local/bin/zsh, but it does with csh. ctr-c and
> ctrl-z are just ignored with both the sh style shells.
>
[Same experience here, with a guess at what is causing this. My system is
an IBM ThinkPad X20. Note I am not really a kernel hacker, and the move in
CURRENT to threads has really dated my knowledge.]
--
Moving from FreeBSD 5.1beta2 to a slightly post-release CURRENT signals
have stopped working under bash and sh for ordinary users (but not for
root). Creating a user from scratch verified that the problem did not stem
from initialization process problems.
The following patch to trap.c might have a failure in the logic by
replacing the call via PCPU_GET(spinlocks) by the direct reference to the
thread->critnest, but this is just a guess.
*** /usr/src-5.1-BETA2/sys/i386/i386/trap.c Wed Apr 30 19:59:27 2003
--- /usr/src-QUIP/sys/i386/i386/trap.c Sat Jun 7 09:34:34 2003
***************
*** 222,231 ****
type);
/*
* Page faults need interrupts diasabled until
later,
! * and we shouldn't enable interrupts while holding
a
! * spin lock.
*/
! if (type != T_PAGEFLT && PCPU_GET(spinlocks) ==
NULL)
enable_intr();
}
}
--- 224,233 ----
type);
/*
* Page faults need interrupts diasabled until
later,
! * and we shouldn't enable interrupts while in a
! * critical section.
*/
! if (type != T_PAGEFLT && td->td_critnest == 0)
enable_intr();
}
}
--
Mark Evenson <evenson@panix.com>
"A screaming comes across the sky. It has happened before, but there is
nothing to compare to it now."
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