Date: Fri, 18 Jan 2013 13:58:10 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Po-Li Soong <polis@spectralogic.com> Cc: Konstantin Belousov <kostikbel@gmail.com>, "stable@FreeBSD.org" <stable@FreeBSD.org> Subject: Re: zio_done panic on unadulterated FreeBSD Release 9.1 Message-ID: <50F938D2.80304@FreeBSD.org> In-Reply-To: <0C4D65F6A0FC9E4B95EA114508C7E0FE5F66E4F3@reactor.sldomain.com> References: <0C4D65F6A0FC9E4B95EA114508C7E0FE5F66DDB6@reactor.sldomain.com> <20130109234924.GM2561@kib.kiev.ua> <0C4D65F6A0FC9E4B95EA114508C7E0FE5F66E4F3@reactor.sldomain.com>
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on 11/01/2013 17:09 Po-Li Soong said the following:
> (kgdb) p/x *(struct vm_object *)0xffffffff81281580
[snip]
>
> (kgdb) p/x *(struct vm_page *)0xfffffe00cd733ab0
> $2 = {pageq = {tqe_next = 0x0, tqe_prev = 0xfffffe00c7e7d678}, listq = {
> tqe_next = 0xfffffe00cd733b28, tqe_prev = 0xfffffe00cd7331d8},
> left = 0xfffffe00c9b31c38, right = 0xfffffe00cd735c70,
> object = 0xfffffffb81281580
So, the correct object pointer is 0xffffffff81281580, but vm_page has object =
0xfffffffb81281580.
0xffffffff81281580
0xfffffffb81281580
One bit flip (0x400000000).
Either there is some HW issue or we've got some code that arbitrarily flips bits
in vm_page_array (and perhaps beyond it).
--
Andriy Gapon
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