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    SubjectRe: Lockup after logging out of X
    Hi Ken,

    On 08/05/07, Ken Moffat <zarniwhoop@ntlworld.com> wrote:
    > This is a resend, with a better title and slightly more
    > clarification. Originally sent yesterday evening, but I can see no
    > evidence that it got beyond my isp's mailserver. Apologies to the
    > Cc's if you did get the original.
    >
    > Using Linus' tree pulled on Sunday afternoon UK time. Running an
    > amd64 ('pure64') desktop using gdm for graphical login, on Xorg 7.2
    > with a radeon 9200se. No problems until I log out of the desktop
    > and go back to gdm. Before that, the text consoles seem to be
    > working fine. After I go back to gdm. the display is corrupted and
    > only MagicSysRQ works. Mostly, the keyboard LEDs flash, but the
    > only thing that made it to the logs was this exceedingly incomplete
    > oops report:
    >
    > May 7 21:02:54 bluesbreaker kernel: [ 46.549615] [drm] writeback
    > test succeeded in 1 usecs
    > May 7 21:03:24 bluesbreaker kernel: [ 61.552793] Unable to handle
    > kernel paging request at ffff81003befd3e8 RIP:
    > May 7 21:03:24 bluesbreaker kernel: [ 61.552798]
    > [<ffffffff80271576>] fasync_helper+0x52/0xf0
    > May 7 21:03:24 bluesbreaker kernel: [ 61.552805] PGD 8063 PUD
    > 9063 PMD 800000003bef11e3 BAD
    > May 7 21:03:24 bluesbreaker kernel: [ 61.552811] Oops: 0009 [1]
    > PREEMPT
    > May 7 21:04:18 bluesbreaker syslogd 1.4.1: restart.
    >
    > After trying git-bisect, it tells me:
    > 0dbf7028c0c1f266c9631139450a1502d3cd457e is first bad commit
    > commit 0dbf7028c0c1f266c9631139450a1502d3cd457e
    > Author: Vivek Goyal <vgoyal@in.ibm.com>
    > Date: Wed May 2 19:27:07 2007 +0200
    >
    > [PATCH] x86: __pa and __pa_symbol address space separation
    >
    > Currently __pa_symbol is for use with symbols in the kernel
    > address
    > map and __pa is for use with pointers into the physical memory
    > map.
    > But the code is implemented so you can usually interchange the
    > two.
    >
    > __pa which is much more common can be implemented much more
    > cheaply
    > if it is it doesn't have to worry about any other kernel address
    > spaces. This is especially true with a relocatable kernel as
    > __pa_symbol needs to peform an extra variable read to resolve
    > the address.
    >
    > [snip the rest of the commit message on the resend]
    > This time, I'll gzip the config in case it was a size problem for
    > the list.

    Please check the latest -git.

    31 hours ago Linus Torvalds Revert "[PATCH] x86: __pa and
    __pa_symbol address space ...

    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e3ebadd95cb621e2c7436f3d3646447ac9d5c16d

    >
    > Ken
    > --
    > das eine Mal als Tragödie, das andere Mal als Farce
    >
    >

    Regards,
    Michal

    --
    Michal K. K. Piotrowski
    Kernel Monkeys
    (http://kernel.wikidot.com/start)
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