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Subjectkexec fail
just found that when kexec 2.6.24-rc7 from RHEL 5.1 kernel got

Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM
Mapping aperture over 65536 KB of RAM @ 20000000
Bad page state in process 'swapper'
page:ffffe20004000018 flags:0x0000000000000000
mapping:0000000000000000 mapcount:1 count:0
Trying to fix it up, but a reboot is needed
Backtrace:
Pid: 0, comm: swapper Not tainted 2.6.24-rc7-smp #1

Call Trace:
[<ffffffff80263fa3>] bad_page+0x63/0x8d
[<ffffffff802640ed>] __free_pages_ok+0x7c/0x2a5
[<ffffffff80ba7161>] free_all_bootmem_core+0xd0/0x198
[<ffffffff80ba3a22>] numa_free_all_bootmem+0x3b/0x76
[<ffffffff80ba30a2>] mem_init+0x4e/0x165
[<ffffffff80b959dc>] start_kernel+0x236/0x2c2
[<ffffffff80b95123>] _sinittext+0x123/0x12a

Bad page state in process 'swapper'
page:ffffe20004000050 flags:0x0000000000000000
mapping:0000000000000000 mapcount:1 count:0
Trying to fix it up, but a reboot is needed
Backtrace:
Pid: 0, comm: swapper Tainted: G B 2.6.24-rc7-smp #1

Call Trace:
[<ffffffff80263fa3>] bad_page+0x63/0x8d
[<ffffffff802640ed>] __free_pages_ok+0x7c/0x2a5
[<ffffffff80ba7161>] free_all_bootmem_core+0xd0/0x198
[<ffffffff80ba3a22>] numa_free_all_bootmem+0x3b/0x76
[<ffffffff80ba30a2>] mem_init+0x4e/0x165
[<ffffffff80b959dc>] start_kernel+0x236/0x2c2
[<ffffffff80b95123>] _sinittext+0x123/0x12a
...

somewhere from 64M

start_kernel
==> mem_init
==> numa_free_all_bootmem
==> free_all_bootmem_node (NODE_DATA(i))
==> free_all_bootmem_core ()
==> __free_pages_boot_mem
==> __free_pages(page, oder)
==>
__free_pages_ok(page, order)
==>
free_pages_check

==> bad_pages...


try to kexec 2.6.23 from RHEL 5.1, will get
Your BIOS doesn't leave a aperture memory hole
Please enable the IOMMU option in the BIOS setup
This costs you 64 MB of RAM ======> reboot

but 2.6.24-rc7 kexec 2.6.24-rc7 is ok.

YH


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