Re: Kernel/Userland Mem-Space Tuning (1/3 on IA32)
> Hello. > I read about address space division of recent operating systems like > Linux and Windows XP. > In both cases, the whole address space of the 32 or 64 Bit system is > divided into halfes, 2GB for > kernel, 2 GB for process(es) (speaking in 32Bit words). The same in > 64bit systems like AMD64. > Those who happily utilize an AMD64 based machine are not (yet) involved > by this problem, > but on recent 32 Bit architectures someone can run out of process space, > like me! Some > geophysical modelling software needs more than the allowed 2GB address > space and therefore > I would like to ask whether FreeBSD (my preferred OS) has a 'knob' to > change the kernel/userland parity > of the address space like it is done in Windows with a special knob at > boot time (/W3GB I think, but I'm not > sure about the exakt syntax but I know someone can change the half by > half parity towards 1 to 3 in > XP). I'm not sure whether FreeBSD divides kernel/userland address space > this way, I know Linux and > Windows does and on Windows we changed this (not yet on Linux and not > yet on our FreeBSD machines > (OS version >5.0, mostly FreeBSD 5.3-R or 5.4-PRERELEASE). > > Any help is appreciated. FreeBSD divides the 32bit virtual address space with 1GB for the kernel and 3GB for user processes. This can be changed with some kernel compile- time constants (primarily KVA_PAGES, however NKPT may also need to be increased if the kernel address space is increased). -DG David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 TeraSolutions, Inc. - http://www.terasolutions.com - (888) 346 7175 The FreeBSD Project - http://www.freebsd.org Pave the road of life with opportunities. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Kernel/Userland Mem-Space Tuning (1/3 on IA32)
> >>sure about the exakt syntax but I know someone can change the half by > >>half parity towards 1 to 3 in > >>XP). I'm not sure whether FreeBSD divides kernel/userland address space > >>this way, I know Linux and > >>Windows does and on Windows we changed this (not yet on Linux and not > >>yet on our FreeBSD machines > >>(OS version >5.0, mostly FreeBSD 5.3-R or 5.4-PRERELEASE). > >> > >>Any help is appreciated. > >> > >> > > > > FreeBSD divides the 32bit virtual address space with 1GB for the kernel > >and 3GB for user processes. This can be changed with some kernel compile- > >time constants (primarily KVA_PAGES, however NKPT may also need to be > >increased if the kernel address space is increased). ... > Dear David. > Thank you very much. > I assumed FreeBSD do the same like Linux, but don't obviously. > > I found a lot of tweaking kernel parameters, > KVA_PAGES > VM_KMEM_SIZE_SCALE > VM_KMEM_SIZE_MAX > VM_KMEM_SIZE The last three are not related to the address space division and you should not change those under normal circumstance. > Reading some comments in sys/kern/kern_malloc.c make be a bit confused, > I do not know much about kernel's interna. > > It is nice to hear that FreeBSD do a 1/3 division, I expected a 2/2 > division like Linux does. So no need for anything changing. It's a 1:4 ratio. > Can someone please explain NKPT? I'm simply curious, didn't found a > satisfying answer via google, but a lot of source code with this in ... It's the number of page table pages that are assigned to the kernel address space. Each page maps 4MB, so 256 (the default) provides for 1GB of kernel virtual address space, leaving 3GB for user space. -DG David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 TeraSolutions, Inc. - http://www.terasolutions.com - (888) 346 7175 The FreeBSD Project - http://www.freebsd.org Pave the road of life with opportunities. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Breach of Contract Reported for FREEBSD.ORG
> Dear Customer, > > > > It has been brought to our attention that some or all of the information > associated with your domain name FREEBSD.ORG is outdated or incorrect. > These types of complaints are brought to our attention in one of two > ways. > > > > The most common type of complaint is received from the Internet > Corporation for Assigned Names and Numbers (ICANN). ICANN is the > non-profit corporation responsible for accrediting domain name > registrars. ICANN requires domain name registration customers to keep > their account information current. ICANN mandates that outdated contact > information can be grounds for domain name cancellation. Michelle, The registration information for freebsd.org is correct. The only thing that is out of date is one of the email addresses ([EMAIL PROTECTED]), which I have tried to change, but have been unable to due to a problem with the Network Solutions website. I don't know who reported that the information was incorrect, but they are mistaken. I will additionally follow up in the other ways mentioned in your message. -DG Dr. David G. Lawrence President Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500 Pave the road of life with opportunities. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
