Date: Fri, 25 Sep 2009 01:01:11 -0500 From: Alan Cox <alc@cs.rice.edu> To: Peter Kieser <peter@wingless.org> Cc: alc@freebsd.org, freebsd-current@freebsd.org Subject: Re: Superpages and VMware ESXi 3.5u4 crashes Message-ID: <4ABC5CA7.10702@cs.rice.edu> In-Reply-To: <4ABC585D.6090609@wingless.org> References: <4ABB200E.3020706@wingless.org> <ca3526250909242223n325b2e4cl5af249f87cc5383f@mail.gmail.com> <4ABC585D.6090609@wingless.org>
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Peter Kieser wrote: > On 9/24/2009 10:23 PM, Alan Cox wrote: >> I would agree that this seems like a bug in ESX. Nonetheless, I'm >> curious to know something about our your system. What type of processor >> are you using, and in particular is ESX using hardware supported nested >> paging? >> >> Regards, >> Alan >> > > I'm using an AMD Phenom 9950. How would I tell if ESXi is using > hardware supported nested paging? Is this something I can tell in > FreeBSD? Ok. Your processor does support nested paging, although you may have to explicitly enable it in your BIOS. FreeBSD can't tell whether you're using nested paging. Support for nested paging is implemented in the hypervisor and is invisible to the guess, so only ESX can tell you if it's being used. Unfortunately, I'm not familiar enough with ESX to tell you how to determine this. If you're not currently using nested paging, it's plausible that turning it on could make this problem go away. Likewise, if you are currently using nested paging, turning it off may help. If nothing else, this could help narrow down where the problem lies. Alan
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