Date: Sun, 31 Aug 2025 18:34:19 -0600 From: Warner Losh <imp@bsdimp.com> To: Tomek CEDRO <tomek@cedro.info> Cc: "freebsd-arch@freebsd.org" <arch@freebsd.org> Subject: Re: old-school tty garbage collection: comcontrol Message-ID: <CANCZdfrKeUGBsfYJFUjgrpYNUehVzF7uK8%2BBBgueayxN3hcDGg@mail.gmail.com> In-Reply-To: <CAFYkXjk2YCdx3w3aJTw5BhybTia7Szg7DKg%2BoU-Ej2=BgbMXBw@mail.gmail.com> References: <CANCZdfpbBBEA_NvynBQGzYxAGjbTrxkhGU5x=7TuxR6XomZHxQ@mail.gmail.com> <CAFYkXjk2YCdx3w3aJTw5BhybTia7Szg7DKg%2BoU-Ej2=BgbMXBw@mail.gmail.com>
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[-- Attachment #1 --] On Sun, Aug 31, 2025, 6:28 PM Tomek CEDRO <tomek@cedro.info> wrote: > On Mon, Sep 1, 2025 at 1:52 AM Warner Losh <imp@bsdimp.com> wrote: > > (..) > > But it only leaves 'drainwait' in comcontrol(8), and that's not been > relevant to modems since the late 90s (the ones that were trouble largely > disappeared from service by 2005). I wonder if we might not want to just > retire comcontrol entirely. This one feature is the sole-surviving remnant > from the 386BSD patchkit driver that Christopher G. Demetriou wrote that > FreeBSD 1 imported (and we reimported into FreeBSD 2). > > Does anybody still use it? I think not. > > Isn't camcontrol still used by ada/cd/da/pass devices? > For c*A*mcontrol is yes. But I'm talking about c*O*mcontrol... I had totally forgotten about it since I think I last used it in the 90s... and even then it was for a custom serial device the hw engineer fixed to not need it. Warner -- > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info > [-- Attachment #2 --] <div dir="auto"><div><br><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, Aug 31, 2025, 6:28 PM Tomek CEDRO <<a href="mailto:tomek@cedro.info">tomek@cedro.info</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Mon, Sep 1, 2025 at 1:52 AM Warner Losh <<a href="mailto:imp@bsdimp.com" target="_blank" rel="noreferrer">imp@bsdimp.com</a>> wrote:<br> > (..)<br> > But it only leaves 'drainwait' in comcontrol(8), and that's not been relevant to modems since the late 90s (the ones that were trouble largely disappeared from service by 2005). I wonder if we might not want to just retire comcontrol entirely. This one feature is the sole-surviving remnant from the 386BSD patchkit driver that Christopher G. Demetriou wrote that FreeBSD 1 imported (and we reimported into FreeBSD 2).<br> > Does anybody still use it? I think not.<br> <br> Isn't camcontrol still used by ada/cd/da/pass devices?<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">For c*A*mcontrol is yes. But I'm talking about c*O*mcontrol... I had totally forgotten about it since I think I last used it in the 90s... and even then it was for a custom serial device the hw engineer fixed to not need it.</div><div dir="auto"><br></div><div dir="auto">Warner</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote gmail_quote_container"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> -- <br> CeDeROM, SQ7MHZ, <a href="http://www.tomek.cedro.info" rel="noreferrer noreferrer" target="_blank">http://www.tomek.cedro.info</a><br>; </blockquote></div></div></div>help
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