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Date: Tue, 24 Aug 2010 21:32:09 +0300 From: Pekka Enberg <penberg@...helsinki.fi> To: Christoph Lameter <cl@...ux.com> CC: Stephen Rothwell <sfr@...b.auug.org.au>, linux-next@...r.kernel.org, linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org> Subject: Re: linux-next: build failure after merge of the final tree (slab tree related) 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@...er) (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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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