Date: Thu, 24 Mar 2016 10:32:49 +0100 From: =?UTF-8?Q?Jean-S=c3=a9bastien_P=c3=a9dron?= <jean-sebastien.pedron@dumbbell.fr> To: Ian Lepore <ian@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r297190 - head/sys/kern Message-ID: <56F3B441.6030602@dumbbell.fr> In-Reply-To: <20160323174537.GA1826@brick.home> References: <201603221346.u2MDk1XH029623@repo.freebsd.org> <1458662141.1091.16.camel@freebsd.org> <56F29654.8030806@dumbbell.fr> <20160323174537.GA1826@brick.home>
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From: =?UTF-8?Q?Jean-S=c3=a9bastien_P=c3=a9dron?=
<jean-sebastien.pedron@dumbbell.fr>
To: Ian Lepore <ian@freebsd.org>, src-committers@freebsd.org,
svn-src-all@freebsd.org, svn-src-head@freebsd.org
Message-ID: <56F3B441.6030602@dumbbell.fr>
Subject: Re: svn commit: r297190 - head/sys/kern
References: <201603221346.u2MDk1XH029623@repo.freebsd.org>
<1458662141.1091.16.camel@freebsd.org> <56F29654.8030806@dumbbell.fr>
<20160323174537.GA1826@brick.home>
In-Reply-To: <20160323174537.GA1826@brick.home>
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On 23/03/2016 18:45, Edward Tomasz Napierala wrote:
>> So maybe callouts are disabled in this situation. If there is a way to=
>> detect that, then vt(4) can go back to a "synchronous mode" where it
>> refreshes the screen after each typed character, like it does when ddb=
>> is active.
>=20
> Looks like that's the case: for some reason the callouts don't work.
> This trivial hack is a (mostly) working workaround:
>=20
> Index: svn/head/sys/kern/kern_cons.c
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> --- svn/head/sys/kern/kern_cons.c (revision 297210)
> +++ svn/head/sys/kern/kern_cons.c (working copy)
> @@ -430,6 +430,7 @@ cngets(char *cp, size_t size, int visible)
> lp =3D cp;
> end =3D cp + size - 1;
> for (;;) {
> + pause("meh", 1);
Could you please explain how this works to me? Does calling pause() here
give a chance to interrupt handlers or other threads of running?
--=20
Jean-S=E9bastien P=E9dron
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