Date: Tue, 30 Jul 2024 15:22:47 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Michael Gmelin <grembo@freebsd.org> Cc: =?UTF-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@FreeBSD.org>, freebsd-current@freebsd.org Subject: Re: filemon Message-ID: <c7ea9ec3-b8a3-4048-a79e-226a508935bd@quip.cz> In-Reply-To: <20240730145556.0907ca84.grembo@freebsd.org> References: <ZqT6_a_0F8DCUsBm@int21h> <CAFDf7UKxhSu%2BqMGV1KahrSX9ho8vFut4avxNVX4D8QGa6%2B%2BTjQ@mail.gmail.com> <20240727170122.675f6bfe@ernst.home> <865xsn6ya9.fsf@ltc.des.dev> <a5471d18-7f88-4e24-8518-2c7a67ddd7f1@quip.cz> <20240730145556.0907ca84.grembo@freebsd.org>
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On 30/07/2024 14:55, Michael Gmelin wrote: > > On Tue, 30 Jul 2024 11:38:57 +0200 > Miroslav Lachman <000.fbsd@quip.cz> wrote: [..] >> Does this also apply today? I recently read from someone on a mailing >> list that the kld_list in rc.conf is no longer needed, that any >> problems it used to solve are solved, and that the preferred way is >> to load everything from loader.conf. So I'm curious, what's the right >> thing to do then? (I load most of my modules from rc.conf) >> > > I think this is what you're referring to, quoting Warner (emphasis is > mine): > https://lists.freebsd.org/archives/freebsd-current/2024-May/005953.html > > w> Also, in this case, kld_list is a terrible place to load the files. > w> You're better off loading them with xxx_load=YES in loader.conf. The > w> reason is that both uhid and ums will match your mouse. kld_list > w> loads these in a random order (effectively) and the first one to > w> load will claim the device, since there's no re-probe when the next > w> one loads. **You should never use it, unless the module you're > w> loading isn't supported by the boot loader (like drm-kmod)**. The old > w> advice was to put everything in kld_list and it would speed up boot, > w> but all the performance bugs in the boot loader have been fixed by a > w> combination of moving to UEFI (which is generally faster), BIOSes > w> with performance bugs disappearing 10 years ago and block caching > w> being added to the boot loader. It should almost always be empty or > w> just drm-mod these days (unless you somehow have special needs). > w> > w> By adding uhid last to this list in this way, you're guaranteeing > w> you'll hit this bug because it's not after ums, and that things > w> won't work. > w> > w> Warner > > Cheers Yes, this is it! I didn't remember the subject, so I couldn't find it. Thank you for the original message! Kind regards Miroslav Lachmanhelp
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