Date: Sun, 02 Feb 2025 20:25:59 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Steven Harms (High-Security Mail)" <sgharms@stevengharms.com> Cc: Tomek CEDRO <tomek@cedro.info>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: Adjustments to userland for a quieter startup (RC system) Message-ID: <202502022026.512KQ05r004151@critter.freebsd.dk> In-Reply-To: <44Sc-RwC_I83PwTD-UykFfG8EFcHnBwZscSteeNEqJ_sdnmc-wrhdj-kWf2XxYDln0qB70HW3AD9qqBLEkBNeohWxlugR68PuDNYVR85PBE=@stevengharms.com> References: <JDv17dtjl93rFR9A8XB9qHlawC2oW7JmmXWsnMKq2r51p61si48CAAOzIBi6pY_nTMdJ7zCvSL6M-Hics-CrqLhDJjZP2SG0v1zEHqH8Ug4=@stevengharms.com> <CAFYkXjmN7ma1GDuFP5p3KdHJtoO9Yri-iNLtuOL6mDKx91CBhA@mail.gmail.com> <CAFYkXjnEW8G03VKw4B77-aMQFnPLH7RZQApxWqCZpts5rpQWiA@mail.gmail.com> <S0scwcCr6CV-mqjXoa25r0XOQqm86TCcIXyl9iZ0mV-BrIKOlkfuHKxqjpbH8cuinimu4-9QRren6m9GGEZ5j_euqb9Vz0Wry1kXCalH30Y=@stevengharms.com> <CAFYkXjnKHjwEbsZ2r7n-HvdWZjvBBdNBBp5enLLdRy63D1Z02g@mail.gmail.com> <44Sc-RwC_I83PwTD-UykFfG8EFcHnBwZscSteeNEqJ_sdnmc-wrhdj-kWf2XxYDln0qB70HW3AD9qqBLEkBNeohWxlugR68PuDNYVR85PBE=@stevengharms.com>
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I'm just going to throw this idea out here: Various non-UNIX operating systems dedicate a small piece of raw disk to logging purposes, and stick everything on there, instead of blasting it at users, who seldom care and cannot read that fast anyway. The big advantage is that the log is incredibly robust, as long as the disk works, it gets recorded. But the log is also easy to get to, both from a running system and from a disk which is beyond repair. Admittedly, most of the systems I have seen this on, had simple disk-controller interfaces, whereas we have who knows how many different kinds of devices and interfaces which masqurade as "disks". But we already have infrastructure for swap-spaces and dumping to them, even when the kernel is pretty hosed, so one would not have to start the project from scratch. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.home | help
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