cvs commit: src/sys/boot/i386/loader main.c
jhb at freebsd.org
Mon Dec 19 11:23:49 PST 2005
On Monday 19 December 2005 01:32 pm, Maxim Sobolev wrote:
> John Baldwin wrote:
> > On Monday 19 December 2005 04:26 am, Maxim Sobolev wrote:
> >> sobomax 2005-12-19 09:26:42 UTC
> >> FreeBSD src repository
> >> Modified files:
> >> sys/boot/i386/loader main.c
> >> Log:
> >> If LOADER_BZIP2_SUPPORT is defined allocate heap in the 1MB-4MB range
> >> to provide enough room for decompression (up to 2.5MB is necessary).
> >> This should be safe to do since we load i386 kernels after 8MB mark now,
> >> so that 16MB is the minimum amount of RAM necessary to even boot
> >> FreeBSD.
> > Err, I thought we loaded PAE kernels at 2MB and non-PAE kernels at 4MB to
> > skip the first PSE page (PSE pages are 2MB on PAE).
> You are right, my mistake, sorry. In any case memory in the range
> 1MB-4MB can be used by default.
Errm, no it can't. PAE kernels (and amd64 kernels I think) are both loaded at
2MB, so that only leaves memory in the range 1MB-2MB.
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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