actually, this is a really good point. i typically have a couple of versions of each kernel i compile. for instance, for awhile, quake3 was balking at the free OSS sound driver my girlfriend was using, but not the 4front sound driver. so my quick fix was to compile one kernel with sound and another kernel with sound completely turned off. peter On Thu 14 Dec 00, 2:50 PM, Christoph Simon said... > On Thu, 14 Dec 2000 08:35:50 -0800 > Peter Jay Salzman <p@dirac.org> wrote: > > > On Wed 13 Dec 00, 11:28 PM, Ethan Benson said... > > > On Wed, Dec 13, 2000 at 11:07:18PM -0800, Peter Jay Salzman wrote: > > > > i wrote a very nice piece on the System.map file. you can find it at my > > > > personal website, along with other bits and pieces of linux knowledge: > > > > > > > > http://www.dirac.org/p/linux/systemmap.html > > > > > > > > what's most likely happening is that the System.map file that klogd is > > > > finding is in /boot/System.map, since that's the first location klogd will > > > > look by default. > > > > > > > > one of the steps when you compile a kernel would be: > > > > > > > > cp /usr/src/linux/System.map /boot/System.map-thisversion > > > > > > good > > > > > > > ln -s /boot/System.map-thisversion /boot/System.map > > > > > > unecessary, this has not been required ever since 2.2 kernels came > > > out, and possibly even before that. everything that uses System.map > > > looks for System.map-`uname -r` you don't need that symlink. redhat > > > still does this for incomprehensible reasons. all it accomplishes is > > >allowing you to only boot one version of the kernel with a matching System.map. > > > > ethan, this is fantastic news if true. > > > > i tried to verify your claim by looking at the man page for klogd. > > couldn't find anything about looking for System.map-version. > > > > i also looked in /usr/src/Documentation/oops-tracing, with no success. > > > > i do beleive you, but can you give me a reference on this? > > Actually, I did use this since quite a while, but then, there is at > least one situation, when it doesn't (can't) work: If I compile the > same kernel with different options (for instance to test tuning > options), calling them, say 2.2.18a and 2.2.18b, it will not read > normally The Right System.map file. It's a pitty, that this is not > taken from the kernel's name (vmlinux-2.2.18a). But of course this > isn't even possible since the kernel is loaded much earlier than any > file system... > > -- > Christoph Simon > ciccio@prestonet.com.br
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