Date: Sun, 30 May 2010 23:11:02 -0400 From: "Peter C. Lai" <peter@simons-rock.edu> To: Dave Hayes <dave@jetcafe.org> Cc: Garrett Cooper <yanefbsd@gmail.com>, freebsd-stable@freebsd.org, Clifton Royston <cliftonr@lava.net>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: Locking a file backed mdconfig into memory Message-ID: <20100531031102.GD63749@cesium.hyperfine.info> In-Reply-To: <201005310242.o4V2glZX057087@hugeraid.jetcafe.org> References: <201005272348.o4RNmgWh014243@hugeraid.jetcafe.org> <20100528043006.GA18560@lava.net> <201005281757.o4SHvTwq020905@hugeraid.jetcafe.org> <20100528191828.GA83371@icarus.home.lan> <201005281926.o4SJQCW3041849@hugeraid.jetcafe.org> <20100528215837.GA86689@icarus.home.lan> <AANLkTikq8AJIlvIkWkGIaS6mlqWOAPreVY7ALs3AO98v@mail.gmail.com> <201005310242.o4V2glZX057087@hugeraid.jetcafe.org>
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On 2010-05-30 07:42:47PM -0700, Dave Hayes wrote: > Garrett Cooper <yanefbsd@gmail.com> writes: > > This is how I do it in my quickie loader.rc: > > include /boot/loader.4th > > set vfs.root.mountfrom="ufs:/dev/md0" > > load /kernel > > load -t mfs_root /mfsroot > > start > > I used to do exactly this back at FreeBSD 4.11 to boot off a cdrom. > Nice to know it still works this way. > > Jeremy Chadwick <freebsd@jdc.parodius.com> writes: > > However, what I'm having trouble understanding is what exactly > > preload_search_info() looks for and how all this actually connects > > and works. It appears to me that there are specific drivers located in > > src/sys/dev that are KLD-supported and others which are expected to be > > included in the kernel statically. > > Maybe this confusion explains why /dev/md0c is giving me random crashes > at the moment? > > Of course, another theory might be the size of my initial ramdisk > (300Mb). Would there any known bug where booting off a large ramdisk > causes unreadable panics to flash past the console too rapidly to view? Run memtest86 on the first 300mb of ram lately? Does your ramdisk crash at any size? -- =========================================================== Peter C. Lai | Bard College at Simon's Rock Systems Administrator | 84 Alford Rd. Information Technology Svcs. | Gt. Barrington, MA 01230 USA peter AT simons-rock.edu | (413) 528-7428 ===========================================================
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