memory.c - bad pmd - x86_64

[Dave Jones]

On Mon, May 23, 2005 at 04:48:29PM -0700, Peter J. Stieber wrote:
 > PJS = Peter J. Stieber
 > PJS>> I was under the impression the test kernel had
 > PJS>> some type of debug messages in it someone
 > PJS>> would be interested in. Was I wrong about that?
 > 
 > DJ = Dave Jones
 > DJ> No, you are correct. But nothing triggered with the latest builds.
 > 
 > PJS>> I guess your saying I should go a head and update
 > PJS>> and see what happens?
 > 
 > DJ> Theres a number of other fixes in there which may have
 > DJ> caused the problem to go into hiding..  I can't reproduce
 > DJ> it at all any more, and some others who were seeing it
 > DJ> haven't seen it recently either.
 > 
 > This morning I ran Memtest-86 v3.2 on the machine in question. I let it 
 > run for a little over 6 hours. It made 7 passes of the memory tests and 
 > had no errors.
 > 
 > Next I updated the kernel to 2.6.11-1.27_FC3smp. The problem happened 
 > pretty quickly for me:
 > 
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe000(0000000000401b80).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe008(000000000000000b).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe010(0000000000000220).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe018(000000000000000c).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe020(0000000000000220).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe028(000000000000000d).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe030(00000000000001f7).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe038(000000000000000e).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe040(00000000000001f7).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe048(0000000000000017).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe058(000000000000000f).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe060(00007ffffffff081).
 > May 23 16:34:36 maggie kernel: collect2:9582: mm/memory.c:98: bad pmd 
 > ffff8100190fe080(0034365f36387800).
 > 
 > The collect2 command is coming from the build sequence I described in 
 > earlier emails. If I try it a second time ir runs successfully. I've 
 > seen sh cause it too.
 > 
 > Note that 34365f363878 in the last line = 46_68x in ASCII, which is 
 > x86_64 in reverse.
 > 
 > Is there anything else I should be looking for?
 > 
 > I'd be willing to try any debug kernel to help find the problem.

Give the test kernel at http://people.redhat.com/davej/kernels/Fedora/
a shot (-28_FC3).  That should be slightly different output.

		Dave