Messages in this thread | | | Date | Mon, 31 Mar 2003 10:53:41 -0800 | From | "Randy.Dunlap" <> | Subject | [announce] kmsgdump for 2.5.65/66 |
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On Sat, 22 Mar 2003 14:36:07 -0500 Nicholas Wourms <nwourms@myrealbox.com> wrote:
| Randy.Dunlap wrote: | | > I've done some 2.5.xyz work on kmsgdump (dump kernel messages to | > floppy). I'll try to get back to it soon. | > | | Thank you! That'd be a god-send for those of us w/o serial | ports and who have very cramped hands from hand-copying | panics :-D. Frankly, I can't imagine why something a simple | as this isn't in the kernel. Technically, it isn't a | debugger, so I don't think it violates Linus' "No Kernel | Debuggers in the Kernel" rule.
so.....
kmsgdump for Linux 2.5.65/2.5.66 2003-03-31 version 0.4.5
kmsgdump home: http://w.ods.org/tools/kmsgdump/ (Willy Tarreau) my kmsgdump patches: http://www.xenotime.net/linux/kmsgdump/
'kmsgdump-2565.diff' applies cleanly to Linux 2.5.65 and with just a few patch offsets to Linux 2.5.66.
Tested on P4 UP and P4 SMP (Linux 2.5.65/66).
======================================================================
kmsgdump is a Linux kernel patch for x86 that can be used to dump the contents of the kernel log buffer to a floppy disk or to a printer (one that the system BIOS knows about) after a kernel panic happens.
======================================================================
caveats:
1. This version of kmsgdump doesn't support kernel log buffers of more than 60 KB (due to x86 real-mode segment addressing). However, the kernel log buffer is currently always a power of 2 (like 16 or 32 or 64 KB), so a 32 KB log buffer is the largest that is currently supported.
2. The kmsgdump text-mode interface doesn't work with a USB-only keyboard setup. I had to add a PS/2 keyboard to my test system to use it.
======================================================================
TODO:
1. Limit LOG_BUF_LEN to 60 KB then fix this limit by having a moving segment register value
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