On 24.8.2010 20.59, Christoph Lameter wrote:
On Tue, 24 Aug 2010, Pekka Enberg wrote:
Thanks for the report. The problem should be fixed by this commit:
Its not that easy. __alloc_percpu falls back to kzalloc() on UP and this
can result in unique bootstrap problems with UP since the bootstrap array
is no longer there. Does the UP kernel boot?
No, I get this under kvm:
[ 0.000000] Linux version 2.6.36-rc2+ (penberg@tiger) (gcc version
4.4.1 (Ubuntu 4.4.1-4ubuntu9) ) #103 Tue Aug 24 21:27:28 EEST 2010
[ 0.000000] Command line: notsc nolapic nosmp noacpi pci=conf1
earlyprintk=ttyS0,keep
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
[ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
[ 0.000000] BIOS-e820: 00000000000f0000 - 00000000000fffff (reserved)
[ 0.000000] BIOS-e820: 0000000000100000 - 0000000004000000 (usable)
[ 0.000000] console [earlyser0] enabled
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] No AGP bridge found
[ 0.000000] last_pfn = 0x4000 max_arch_pfn = 0x400000000
[ 0.000000] x86 PAT enabled: cpu 0, old 0x0, new 0x7010600070106
[ 0.000000] CPU MTRRs all blank - virtualized system.
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] modified physical RAM map:
[ 0.000000] modified: 0000000000000000 - 0000000000010000 (reserved)
[ 0.000000] modified: 0000000000010000 - 000000000009fc00 (usable)
[ 0.000000] modified: 000000000009fc00 - 00000000000a0000 (reserved)
[ 0.000000] modified: 00000000000f0000 - 00000000000fffff (reserved)
[ 0.000000] modified: 0000000000100000 - 0000000004000000 (usable)
[ 0.000000] init_memory_mapping: 0000000000000000-0000000004000000
[ 0.000000] ACPI Error: A valid RSDP was not found
(20100702/tbxfroot-219)
[ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[ 0.000000] kvm-clock: cpu 0, msr 0:1945621, boot clock
[ 0.000000] Zone PFN ranges:
[ 0.000000] DMA 0x00000010 -> 0x00001000
[ 0.000000] DMA32 0x00001000 -> 0x00100000
[ 0.000000] Normal empty
[ 0.000000] Movable zone start PFN for each node
[ 0.000000] early_node_map[2] active PFN ranges
[ 0.000000] 0: 0x00000010 -> 0x0000009f
[ 0.000000] 0: 0x00000100 -> 0x00004000
[ 0.000000] No local APIC present
[ 0.000000] APIC: disable apic facility
[ 0.000000] APIC: switched to apic NOOP
[ 0.000000] PM: Registered nosave memory: 000000000009f000 -
00000000000a0000
[ 0.000000] PM: Registered nosave memory: 00000000000a0000 -
00000000000f0000
[ 0.000000] PM: Registered nosave memory: 00000000000f0000 -
00000000000ff000
[ 0.000000] PM: Registered nosave memory: 00000000000ff000 -
0000000000100000
[ 0.000000] Allocating PCI resources starting at 4000000 (gap:
4000000:fc000000)
[ 0.000000] Booting paravirtualized kernel on KVM
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 16047
[ 0.000000] Kernel command line: notsc nolapic nosmp noacpi pci=conf1
earlyprintk=ttyS0,keep
[ 0.000000] notsc: Kernel compiled with CONFIG_X86_TSC, cannot
disable TSC completely.
[ 0.000000] PID hash table entries: 256 (order: -1, 2048 bytes)
[ 0.000000] Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Checking aperture...
[ 0.000000] No AGP bridge found
[ 0.000000] Subtract (23 early reservations)
[ 0.000000] #0 [0001000000 - 0001b751a0] TEXT DATA BSS
[ 0.000000] #1 [000009f000 - 0000100000] BIOS reserved
[ 0.000000] #2 [0000010000 - 0000012000] TRAMPOLINE
[ 0.000000] #3 [0000012000 - 0000016000] ACPI WAKEUP
[ 0.000000] #4 [0001b751c0 - 0001b761c0] BOOTMEM
[ 0.000000] #5 [0001f761c0 - 0001f761d8] BOOTMEM
[ 0.000000] #6 [0002377000 - 0002378000] BOOTMEM
[ 0.000000] #7 [0002378000 - 0002379000] BOOTMEM
[ 0.000000] #8 [0002400000 - 0002600000] MEMMAP 0
[ 0.000000] #9 [0001b761c0 - 0001b762c0] BOOTMEM
[ 0.000000] #10 [0001b762c0 - 0001b766c0] BOOTMEM
[ 0.000000] #11 [0001b77000 - 0001b78000] BOOTMEM
[ 0.000000] #12 [0001b766c0 - 0001b767d8] BOOTMEM
[ 0.000000] #13 [0001b76800 - 0001b76868] BOOTMEM
[ 0.000000] #14 [0001b76880 - 0001b768e8] BOOTMEM
[ 0.000000] #15 [0001b76900 - 0001b76968] BOOTMEM
[ 0.000000] #16 [0001b76980 - 0001b769e8] BOOTMEM
[ 0.000000] #17 [0001b76a00 - 0001b76a20] BOOTMEM
[ 0.000000] #18 [0001b76a40 - 0001b76a7d] BOOTMEM
[ 0.000000] #19 [0001b76a80 - 0001b76abd] BOOTMEM
[ 0.000000] #20 [0001b78000 - 0001b78800] BOOTMEM
[ 0.000000] #21 [0001b78800 - 0001b88800] BOOTMEM
[ 0.000000] #22 [0001b88800 - 0001b90800] BOOTMEM
[ 0.000000] Memory: 51156k/65536k available (6550k kernel code, 452k
absent, 13928k reserved, 3761k data, 764k init)
[ 0.000000] Kernel panic - not syncing: Cannot create slab kmem_cache
size=232 realsize=256 order=0 offset=0 flags=42000
[ 0.000000]
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.36-rc2+ #103
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81659a35>] panic+0x91/0x19b
[ 0.000000] [<ffffffff81126e59>] kmem_cache_open+0x1e9/0x200
[ 0.000000] [<ffffffff81a3141a>] kmem_cache_init+0x57/0x300
[ 0.000000] [<ffffffff81a14a97>] start_kernel+0x1ca/0x396
[ 0.000000] [<ffffffff81a14325>] x86_64_start_reservations+0x12c/0x130
[ 0.000000] [<ffffffff81a14423>] x86_64_start_kernel+0xfa/0x109
Why did this ever build on my UP configuration tests? Hmmm... I only
tested x86_64 UP. This was 32 bit UP I guess.
I could reproduce the build problem with x86-64 and !CONFIG_SMP so it's
not related to 32-bit.
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