Date: Fri, 23 May 2003 17:40:19 -0500 From: "Cagle, John (ISS-Houston)" <john.cagle@hp.com> To: "Jake Burkholder" <jake@locore.ca> Cc: current@freebsd.org Subject: RE: 5.1 PAE testing results: 2 panics Message-ID: <C50AB9511EE59B49B2A503CB7AE1ABD10476C506@cceexc19.americas.cpqcorp.net>
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Interesting new datapoint on my PAE testing -- I built a kernel without SMP and APIC (just the stock PAE config file) and now I _cannot_ crash it. Of course, it's only using one processor... :-( Is it possible that the memory allocation algorithms aren't taking into consideration that there may be multiple processors with SMP enabled? Are there any large per-processor data structures that aren't being accounted for when you have more than one processor? Regards, John > -----Original Message----- > From: Cagle, John (ISS-Houston)=20 > Sent: Friday, May 23, 2003 10:03 AM > To: Jake Burkholder > Cc: current@freebsd.org > Subject: RE: 5.1 PAE testing results: 2 panics >=20 > > -----Original Message----- > > From: Jake Burkholder [mailto:jake@locore.ca] > > > panic: kmem_malloc(4096): kmem_map too small: 96624640 total > > > allocated > > >=20 > > > I tried lowering kern.maxvnodes from 536130 (default) to > > 200000, but > > > that did not alleviate the panic. > >=20 > > Can you try reducing this by half again to 100,000 and see if > > that helps things? Increasing the amount of available kva=20 > > with options KVA_PAGES may also work, but finding the right=20 > > limits for vnodes is a better solution. Note that the values=20 > > for KVA_PAGES are doubled with PAE, eg 512 gives you the=20 > > standard 3G user/1G kernel split. >=20 > I have gone as low as 10,000 for kern.maxvnodes, and it still=20 > Panics with "kmem_map too small". How low should I go? >=20 > I also built a kernel with KVA_PAGES set to 512 and it=20 > paniced the same way (without changing kern.maxvnodes). When=20 > I also changed maxvnodes to 100,000, then the system hung=20 > instead of panicing... >=20 > Anything else I can try? Keep in mind I'm running SMP. =20 > Should I try it with a UP kernel? >=20 > Thanks, > John > -------------------------------- > John Cagle john.cagle@hp.com > Principal Member Technical Staff > Industry Standard Servers > Hewlett-Packard Company=20
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