From owner-freebsd-hackers Mon Sep 24 16:26: 3 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from earth.backplane.com (earth-nat-cw.backplane.com [208.161.114.67]) by hub.freebsd.org (Postfix) with ESMTP id D62F837B427 for ; Mon, 24 Sep 2001 16:26:00 -0700 (PDT) Received: (from dillon@localhost) by earth.backplane.com (8.11.6/8.11.2) id f8ONPTE97519; Mon, 24 Sep 2001 16:25:29 -0700 (PDT) (envelope-from dillon) Date: Mon, 24 Sep 2001 16:25:29 -0700 (PDT) From: Matt Dillon Message-Id: <200109242325.f8ONPTE97519@earth.backplane.com> To: Julian Elischer Cc: Ian Dowse , hackers@FreeBSD.ORG Subject: Re: VM Corruption - stumped, anyone have any ideas? References: Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG : :remember that we hit almost this problem with the KSE stuff during :debugging? : :The pointers in the last few entries of the vm_page_buckets array got :corrupted when an agument to a function that manipulated whatever was next :in ram was 0, and it turned out that it was 0 because : of some PTE flushing thing (you are the one that found it... remember?) :(there was a line of asm code missing) I've kept that in mind, but I think this may be a different issue. The memory involved is 100% statically mapped in the kernel page table array, and the errors are more like bit errors then anything else. Either the memory is bad or something in our kernel is setting or clearing flags through a bad pointer. -Matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message