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Old 14th September 2009
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l2fl2f l2fl2f is offline
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Default kernel file from 6.3 to 7.2


Is there an easy way to find the differences between a kernel file for 6.3 vs 7.2.
I try to update my kernel file of 6.3 to build a 7.2 kernel with the same options and devices (upgrade legacy 6.3 to the next legacy 7.2) .


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Old 14th September 2009
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My advice would be to start out with the GENERIC kernel for 7.2, and then build a new custom kernel file using the GENERIC config file, the output of dmesg -a, and your old 6.3 kernel config file as references. Note e.g. the new scheduler (sched_ule), compat.x settings etc.
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Old 14th September 2009
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Yes, there were a lot of changes between 6.x and 7.x that really require creating a new kernel config file.

You can use the old config file as a reference.

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Old 14th September 2009
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Do you actually need a ``custom kernel''? In many cases the GENERIC kernel will work fine. Removing devices and options will not give any benefit in speed or stability.

You can kldload(8) most other required devices. The only reason you might want to compile a custom kernel is when you need certain options that cannot be loaded dynamically such PF_ALTQ (Not included in the GENERIC kernel because of performance reasons).
UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things.
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