cvs commit: src/sys/boot/i386/loader main.c

Maxim Sobolev sobomax at
Mon Dec 19 10:33:15 PST 2005

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.


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