On Fri, 2009-02-06 at 10:19 -0500, Bill Nottingham wrote: > Chris Lalancette (clalance@xxxxxxxxxx) said: > > Do we know if anaconda is going to change > > to choose kernel-PAE for any machine with the PAE flag, regardless of the amount > > of memory? > > That's the plan - the patch should be pretty trivial. I haven't seen this patch yet. As far as I can tell, current anaconda installs the PAE kernel by default if isPaeAvailable() returns true[1]. isPaeAvailable() uses the (somewhat odd) test of checking to see if /proc/iomem has a line where the start address is more than 32 bits long[2] - AFAICT it ignores the cpu flags entirely. In a discussion on IRC earlier today, cebbert mentioned that we might want a check more like: (PAE_flag and >=4GB RAM) or (PAE_flag and vmx_flag and >=1GB RAM) where vmx_flag is the flag for hardware virt stuff. Is this a good test? Some further questions: - Is a PAE kernel required for proper virt support? - Should we be using the PAE kernel *regardless* of memory size (as implied above) or do we want some memory requirements? -w [1] http://git.fedorahosted.org/git/anaconda.git?p=anaconda.git;a=blob;f=yuminstall.py;hb=HEAD#l1259 [2] http://git.fedorahosted.org/git/anaconda.git?p=anaconda.git;a=blob;f=isys/isys.py#l1038
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