Date: Thu, 13 Oct 2005 13:20:27 GMT From: Jimmy Myrick <jmyrick@tiger1.tiger.org> To: freebsd-i386@FreeBSD.org Subject: Re: i386/84563: Panics occur when PAE enabled and >3.5GB memory used Message-ID: <200510131320.j9DDKRMD092470@freefall.freebsd.org>
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The following reply was made to PR i386/84563; it has been noted by GNATS. From: Jimmy Myrick <jmyrick@tiger1.tiger.org> To: <bug-followup@FreeBSD.org>, <dpk@dpk.net> Cc: Subject: Re: i386/84563: Panics occur when PAE enabled and >3.5GB memory used Date: Thu, 13 Oct 2005 08:11:50 -0500 (CDT) This diff also worked for me against 5.4-RELEASE-p8. The machine is a Dell PowerEdge 2800 that has the same problem. When using a PAE enabled kernel it crashes under heavy loads (buildworld for example). A non PAE enabled kernel works fine, but only addresses around 3.5 GB of RAM. The PAE enabled kernel addresses all 4 GB of memory. After applying the diff, the system works fine with all 4 GB of memory available. Has not crashed under heavy load yet. Info on what was changed at line 1859 in /usr/src/sys/i386/i386/pmap.c: - m = PHYS_TO_VM_PAGE(pbits); + m = PHYS_TO_VM_PAGE(*pte); Jimmy Myrick
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