Messages in this thread |  | | | Date | Wed, 17 Sep 2008 12:25:27 -0700 | | From | "H. Peter Anvin" <> | | Subject | Re: [PATCH 0/6] loglevel=pci:8,acpi:8,apic=8 support v6 |
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Jason Baron wrote: > > hi, > > indeed both proposals seem to be addressing a similar core issue - being > able to dynamically (as opposed to re-compiling) change the amount of > verbosity that the kernel spews. I would liken it to adding a -verbose > flag to the kernel. > > Beyond that the 2 approaches differ in a number of ways as I see: >
8) The ability to accessed filtered messages a posteori (via dmesg), which is something we currently take for granted.
This *is* the fundamental difference between what Yinghai has now and both your stuff and Yinghai's original proposal. Not producing the additional messages at all is inherently cheaper, sometimes *much* cheaper, but it obviously means the information is not accessible at all.
At the moment, I would argue that the fact that dmesg is, in effect, more verbose than the kernel itself is a good thing; it makes dmesg dumps more useful.
-hpa
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