Date: Sun, 14 Dec 2014 10:47:58 -0700 From: Ian Lepore <ian@freebsd.org> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: i386 PAE kernel works fine on 10-stable Message-ID: <1418579278.2026.9.camel@freebsd.org>
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This is an out of the blue FYI post to let people know that despite all the misinformation you'll run across if you search for information on FreeBSD PAE support, it (still) works just fine. I've been using it (for reasons related to our build system and products at $work) since 2006, and I can say unequivocally that it works fine on 6.x, 8.x, and now 10.x (and presumably on the odd-numbered releases too but I've never tried those). In my most recent testing with 10-stable, I found it was compatible with drm2 and radeonkms drivers and I was able to run Xorg and gnome just fine. All my devices, and apps, and even the linuxulator worked just fine. One thing that changed somewhere between 8.4 and 10.1 is that I had to add a kernel tuning option to my kernel config: option KVA_PAGES=768 # Default is 512 I suspect that the most frequent use of PAE is on laptops that have 4gb and the default tuning is adequate for that. My desktop machine has 12gb and I needed to bump up that value to avoid errors related to being unable to create new kernel stacks. -- Ian
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