Date: Tue, 03 Feb 2004 11:53:26 -0500 From: Sridhar Chellappa <schellap@spinnakernet.com> To: freebsd-hackers@freebsd.org Subject: Re: Kernel Virtual Address Space Message-ID: <401FD206.9080101@spinnakernet.com> References: <40196875.1050307@spinnakernet.com>
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Sridhar Chellappa wrote: > As part of the Bootup sequence, I see create_pagetables allocate only > 30 Pages for Page Table entries in non-PAE mode and 120 pages in PAE > mode. Does this mean that all the kernel mode entities get only 4 * 30 > * 1024 * 1024 = 120 MB worth of Address Space ? Can I tune the kernel > virtual address space by just changing the "NKPT" define in pmap.h ? > > Also, I heard that the BSD kernel(atleast from 5.1 onward) itself is > pre-emptible and none of the kernel threads have a cpu affinity. How > do I change the behaviour to make the kernel non-preemptible and tie > kernel-threads to a particular CPU ? > > Sridhar. > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org" Under Linux, all kernel threads share the same "Kernel" Virtual Address Space. Is it the same under freeBSD ? If it is not, then what sort of Stuff gets put into the "Kernel" Virtual Address Space?
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