Hi, compiling a Loongson3a kernel with CONFIG_SMP=y on lemote's official kernel (branch master, 7a7d4e7770) shows error messages during boot up and in kernel log:
[ 24.253906] modprobe: page allocation failure: order:0, mode:0x2000d1 [ 24.402343] CPU: 3 PID: 135 Comm: modprobe Not tainted 3.15.0-rc5-dk2+ #3 [..] [ 24.992187] Call Trace: [ 24.992187] [<ffffffff8020c378>] show_stack+0x48/0x70 [ 24.992187] [<ffffffff807e885c>] dump_stack+0x70/0x90 [ 24.992187] [<ffffffff802f8a88>] warn_alloc_failed+0x110/0x134 [ 24.992187] [<ffffffff802fb4f8>] __alloc_pages_nodemask+0x750/0x864 [ 24.992187] [<ffffffff80339ee8>] new_slab+0xe0/0x348 [..] I did not see these kinds of errors with same config and CONFIG_SMP disabled. This is still with the original PMON that came installed with the Xinghuo. I cross-compile all my kernels with with gcc 4.7.3. Full output of dmesg attached below. You can find the kernels in question, including kernel config here [1] (-dk1: without SMP, -dk2: with SMP). Despite these errors, the system did not immediately crash. However I did not allow it to boot beyond the initrd for concerns about possibly corrupting my system. cheers, David [1] https://stech.muecke.pw/david/loongson/7a7d4e7770/ -- GnuPG public key: http://dvdkhlng.users.sourceforge.net/dk2.gpg Fingerprint: B63B 6AF2 4EEB F033 46F7 7F1D 935E 6F08 E457 205F
[ 24.042968] r8169 0000:04:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko] [ 24.253906] modprobe: page allocation failure: order:0, mode:0x2000d1 [ 24.402343] CPU: 3 PID: 135 Comm: modprobe Not tainted 3.15.0-rc5-dk2+ #3 [ 24.546875] Stack : 000000007000cce3 0000000000000000 0000000000000008 000000000000003d [ 24.546875] 000000005000c000 ffffffff804afd98 0000000000000000 ffffffff81310000 [ 24.546875] ffffffff8094e308 ffffffff80a246b7 ffffffff813111d0 9800000179166900 [ 24.546875] 0000000000000087 0000000000000003 0000000000000000 ffffffff812a12a0 [ 24.546875] 0000000000000000 ffffffff807e4e28 980000017f7177b8 ffffffffffffffff [ 24.546875] 9800000179166460 ffffffff802885e4 ffffffffffffffff ffffffff8094e308 [ 24.546875] 0000000000000003 0000000000000087 0000000000000000 0000000000000000 [ 24.546875] 0000000000000000 980000017f717700 0000000000000000 ffffffff807e885c [ 24.546875] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 24.546875] 0000000000000000 ffffffff8020c378 00000000002000d1 ffffffff807e885c [ 24.546875] ... [ 24.992187] Call Trace: [ 24.992187] [<ffffffff8020c378>] show_stack+0x48/0x70 [ 24.992187] [<ffffffff807e885c>] dump_stack+0x70/0x90 [ 24.992187] [<ffffffff802f8a88>] warn_alloc_failed+0x110/0x134 [ 24.992187] [<ffffffff802fb4f8>] __alloc_pages_nodemask+0x750/0x864 [ 24.992187] [<ffffffff80339ee8>] new_slab+0xe0/0x348 [ 24.992187] [<ffffffff807e6bc8>] __slab_alloc.constprop.49+0x240/0x3b8 [ 24.992187] [<ffffffff8033d03c>] __kmalloc+0x180/0x2c4 [ 24.992187] [<ffffffffc009cf7c>] sr_probe+0x230/0x728 [sr_mod] [ 24.992187] [<ffffffff80649380>] driver_probe_device+0xdc/0x254 [ 24.992187] [<ffffffff80649574>] __driver_attach+0x7c/0xb4 [ 24.992187] [<ffffffff8064767c>] bus_for_each_dev+0x58/0xac [ 24.992187] [<ffffffff806489c4>] bus_add_driver+0xf0/0x1f8 [ 24.992187] [<ffffffff80649dc8>] driver_register+0xac/0xfc [ 24.992187] [<ffffffffc00a8040>] init_sr+0x40/0x74 [sr_mod] [ 24.992187] [<ffffffff80200518>] do_one_initcall+0x88/0x140 [ 24.992187] [<ffffffff802a82c4>] load_module+0x1c48/0x1f34 [ 24.992187] [<ffffffff802a870c>] SyS_finit_module+0x70/0x94 [ 24.992187] [<ffffffff802197a8>] handle_sys+0x128/0x14c [ 24.992187] [ 24.992187] Mem-Info: [ 24.992187] DMA per-cpu: [ 24.992187] CPU 0: hi: 0, btch: 1 usd: 0 [ 24.992187] CPU 1: hi: 0, btch: 1 usd: 0 [ 24.992187] CPU 2: hi: 0, btch: 1 usd: 0 [ 24.992187] CPU 3: hi: 0, btch: 1 usd: 0 [ 24.992187] DMA32 per-cpu: [ 24.992187] CPU 0: hi: 6, btch: 1 usd: 2 [ 24.992187] CPU 1: hi: 6, btch: 1 usd: 5 [ 24.992187] CPU 2: hi: 6, btch: 1 usd: 2 [ 24.992187] CPU 3: hi: 6, btch: 1 usd: 5 [ 24.992187] Normal per-cpu: [ 24.992187] CPU 0: hi: 42, btch: 7 usd: 32 [ 24.992187] CPU 1: hi: 42, btch: 7 usd: 39 [ 24.992187] CPU 2: hi: 42, btch: 7 usd: 17 [ 24.992187] CPU 3: hi: 42, btch: 7 usd: 29 [ 24.992187] active_anon:403 inactive_anon:9 isolated_anon:0 [ 24.992187] active_file:2782 inactive_file:84 isolated_file:0 [ 24.992187] unevictable:0 dirty:0 writeback:0 unstable:0 [ 24.992187] free:120334 slab_reclaimable:241 slab_unreclaimable:482 [ 24.992187] mapped:255 shmem:10 pagetables:67 bounce:0 [ 24.992187] free_cma:0 [ 24.992187] DMA free:0kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:14336kB managed:0kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes [ 24.992187] lowmem_reserve[]: 0 40 488 488 [ 24.992187] DMA32 free:160736kB min:464kB low:576kB high:688kB active_anon:816kB inactive_anon:16kB active_file:0kB inactive_file:32kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:245760kB managed:165872kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:16kB slab_reclaimable:80kB slab_unreclaimable:864kB kernel_stack:64kB pagetables:64kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [ 24.992187] lowmem_reserve[]: 0 0 447 447 [ 24.992187] Normal free:1764608kB min:5168kB low:6448kB high:7744kB active_anon:5632kB inactive_anon:128kB active_file:44512kB inactive_file:1312kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1835008kB managed:1834992kB mlocked:0kB dirty:0kB writeback:0kB mapped:4080kB shmem:144kB slab_reclaimable:3776kB slab_unreclaimable:6848kB kernel_stack:1408kB pagetables:1008kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [ 24.992187] lowmem_reserve[]: 0 0 0 0 [ 24.992187] DMA: 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB 0*16384kB = 0kB [ 24.992187] DMA32: 11*16kB (UEM) 6*32kB (UM) 2*64kB (UM) 2*128kB (EM) 3*256kB (UEM) 3*512kB (UEM) 4*1024kB (UEM) 3*2048kB (UEM) 4*4096kB (EM) 2*8192kB (UE) 7*16384kB (MR) = 160752kB [ 24.992187] Normal: 11*16kB (UEM) 6*32kB (UEM) 2*64kB (UM) 1*128kB (M) 1*256kB (M) 1*512kB (U) 2*1024kB (UM) 0*2048kB 2*4096kB (UE) 4*8192kB (UEM) 105*16384kB (UMR) = 1764720kB [ 24.992187] 2878 total pagecache pages [ 24.992187] 0 pages in swap cache [ 24.992187] Swap cache stats: add 0, delete 0, find 0/0 [ 24.992187] Free swap = 0kB [ 24.992187] Total swap = 0kB [ 24.992187] 130944 pages RAM [ 24.992187] 0 pages HighMem/MovableOnly [ 24.992187] 1 pages reserved [ 24.992187] SLUB: Unable to allocate memory on node -1 (gfp=0xd1) [ 24.992187] cache: dma-kmalloc-512, object size: 512, buffer size: 512, default order: 0, min order: 0 [ 24.992187] node 0: slabs: 0, objs: 0, free: 0 [ 24.992187] sr: out of memory. [ 24.992187] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 24.992187] sr 4:0:0:0: Attached scsi CD-ROM sr0 [ 28.429687] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 28.679687] sd 2:0:0:0: Attached scsi generic sg1 type 0 [ 28.679687] sr 4:0:0:0: Attached scsi generic sg2 type 5 [ 36.269531] device-mapper: uevent: version 1.0.3 [ 36.425781] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: dm-de...@redhat.com [ 175.359375] uhci_hcd: USB Universal Host Controller Interface driver [ 189.894531] usb 1-2: new high-speed USB device number 2 using ehci-pci [ 190.023437] usb 1-2: New USB device found, idVendor=0781, idProduct=5408 [ 190.023437] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 190.023437] usb 1-2: Product: U3 Titanium [ 190.023437] usb 1-2: Manufacturer: SanDisk [ 190.023437] usb 1-2: SerialNumber: 0877801DC342C9AF [ 190.023437] usb-storage 1-2:1.0: USB Mass Storage device detected [ 190.023437] scsi5 : usb-storage 1-2:1.0 [ 191.027343] scsi 5:0:0:0: Direct-Access SanDisk U3 Titanium 8.01 PQ: 0 ANSI: 0 CCS [ 191.027343] scsi 5:0:0:1: CD-ROM SanDisk U3 Titanium 8.01 PQ: 0 ANSI: 0 [ 191.027343] sd 5:0:0:0: Attached scsi generic sg3 type 0 [ 191.035156] kworker/u8:2: page allocation failure: order:0, mode:0x2000d1 [ 191.035156] CPU: 3 PID: 60 Comm: kworker/u8:2 Not tainted 3.15.0-rc5-dk2+ #3 [ 191.035156] Workqueue: events_unbound async_run_entry_fn [ 191.035156] Stack : 0000000000000002 ffffffff80287210 0000000000000000 0000000000000001 [ 191.035156] 980000017f58a900 ffffffff8094e308 0000000000000000 0000000000000000 [ 191.035156] 0000000000000000 0000000000000000 0000000000000000 ffffffff812a12a0 [ 191.035156] 0000000000000000 ffffffff807e4e28 980000017f5937b8 ffffffff812a12a0 [ 191.035156] 0000000000000000 ffffffff802532f8 980000017f5937d8 000000005400cce0 [ 191.035156] 0000000000000000 0000000000000002 0000000000000003 7972746e655f6e75 [ 191.035156] 6e665f7972746e65 ffffffff80203278 0000000000000000 0000000000000000 [ 191.035156] 0000000000000000 980000017f593720 0000646e756f626e ffffffff807e885c [ 191.035156] 980000017f010400 980000017f071300 ffffffff8025dc5c 0000000000000000 [ 191.035156] 0000000000000000 ffffffff8020c378 [ 191.035156] sd 5:0:0:0: [sdc] 15682559 512-byte logical blocks: (8.02 GB/7.47 GiB) [ 191.035156] 00000000002000d1 ffffffff807e885c [ 191.035156] ... [ 191.035156] Call Trace: [ 191.035156] [<ffffffff8020c378>] show_stack+0x48/0x70 [ 191.035156] [<ffffffff807e885c>] dump_stack+0x70/0x90 [ 191.035156] [<ffffffff802f8a88>] warn_alloc_failed+0x110/0x134 [ 191.035156] [<ffffffff802fb4f8>] __alloc_pages_nodemask+0x750/0x864 [ 191.035156] [<ffffffff80339ee8>] new_slab+0xe0/0x348 [ 191.035156] [<ffffffff807e6bc8>] __slab_alloc.constprop.49+0x240/0x3b8 [ 191.035156] [<ffffffff8033d03c>] __kmalloc+0x180/0x2c4 [ 191.035156] [<ffffffffc009cf7c>] sr_probe+0x230/0x728 [sr_mod] [ 191.035156] [<ffffffff80649380>] driver_probe_device+0xdc/0x254 [ 191.035156] [<ffffffff806475c4>] bus_for_each_drv+0x54/0xb4 [ 191.035156] [<ffffffff80649250>] device_attach+0x7c/0xb0 [ 191.035156] [<ffffffff80648728>] bus_probe_device+0x3c/0xcc [ 191.035156] [<ffffffff806467e0>] device_add+0x3b4/0x55c [ 191.035156] [<ffffffff80673644>] scsi_sysfs_add_sdev+0x104/0x280 [ 191.035156] [<ffffffff80671bfc>] do_scan_async+0x1e8/0x21c [ 191.035156] [<ffffffff8025dcd0>] async_run_entry_fn+0x74/0x160 [ 191.035156] [<ffffffff80250874>] process_one_work+0x2d0/0x478 [ 191.035156] [<ffffffff802514a4>] worker_thread+0x274/0x41c [ 191.035156] [<ffffffff8025789c>] kthread+0xe4/0xf0 [ 191.035156] [<ffffffff80206e08>] ret_from_kernel_thread+0x14/0x1c [ 191.035156] [ 191.035156] Mem-Info: [ 191.035156] DMA per-cpu: [ 191.035156] CPU 0: hi: 0, btch: 1 usd: 0 [ 191.035156] CPU 1: hi: 0, btch: 1 usd: 0 [ 191.035156] CPU 2: hi: 0, btch: 1 usd: 0 [ 191.035156] CPU 3: hi: 0, btch: 1 usd: 0 [ 191.035156] DMA32 per-cpu: [ 191.035156] CPU 0: hi: 6, btch: 1 usd: 3 [ 191.035156] CPU 1: hi: 6, btch: 1 usd: 5 [ 191.035156] CPU 2: hi: 6, btch: 1 usd: 3 [ 191.035156] CPU 3: hi: 6, btch: 1 usd: 4 [ 191.035156] Normal per-cpu: [ 191.035156] CPU 0: hi: 42, btch: 7 usd: 22 [ 191.035156] CPU 1: hi: 42, btch: 7 usd: 4 [ 191.035156] CPU 2: hi: 42, btch: 7 usd: 20 [ 191.035156] CPU 3: hi: 42, btch: 7 usd: 32 [ 191.035156] active_anon:107 inactive_anon:21 isolated_anon:0 [ 191.035156] active_file:2571 inactive_file:77 isolated_file:0 [ 191.035156] unevictable:216 dirty:0 writeback:0 unstable:0 [ 191.035156] free:120693 slab_reclaimable:254 slab_unreclaimable:545 [ 191.035156] mapped:225 shmem:34 pagetables:17 bounce:0 [ 191.035156] free_cma:0 [ 191.035156] DMA free:0kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:14336kB managed:0kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes [ 191.035156] lowmem_reserve[]: 0 40 488 488 [ 191.035156] DMA32 free:161280kB min:464kB low:576kB high:688kB active_anon:80kB inactive_anon:32kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:245760kB managed:165872kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:48kB slab_reclaimable:112kB slab_unreclaimable:1008kB kernel_stack:64kB pagetables:16kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes [ 191.035156] lowmem_reserve[]: 0 0 447 447 [ 191.035156] Normal free:1769808kB min:5168kB low:6448kB high:7744kB active_anon:1632kB inactive_anon:304kB active_file:41136kB inactive_file:1232kB unevictable:3456kB isolated(anon):0kB isolated(file):0kB present:1835008kB managed:1834992kB mlocked:0kB dirty:0kB writeback:0kB mapped:3600kB shmem:496kB slab_reclaimable:3952kB slab_unreclaimable:7712kB kernel_stack:1232kB pagetables:256kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [ 191.035156] lowmem_reserve[]: 0 0 0 0 [ 191.035156] DMA: 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB 0*16384kB = 0kB [ 191.035156] DMA32: [ 191.035156] sd 5:0:0:0: [sdc] Write Protect is off [ 191.035156] 2*16kB (UE) 7*32kB [ 191.035156] sd 5:0:0:0: [sdc] Mode Sense: 45 00 00 08 [ 191.035156] (UM) 8*64kB (UM) 6*128kB (UEM) 2*256kB (EM) 3*512kB (UEM) 4*1024kB (UEM) 3*2048kB (UEM) 4*4096kB (EM) 2*8192kB (UE) 7*16384kB (MR) = 161280kB [ 191.035156] Normal: 12*16kB (UEM) 45*32kB (UEM) 40*64kB (UEM) 17*128kB (UEM) 8*256kB (UEM) 2*512kB (EM) 1*1024kB (E) 1*2048kB (E) 1*4096kB (U) 4*8192kB (UEM) 105*16384kB (UMR) = 1769696kB [ 191.035156] 2898 total pagecache pages [ 191.035156] 0 pages in swap cache [ 191.035156] Swap cache stats: add 0, delete 0, find 0/0 [ 191.035156] Free swap = 0kB [ 191.035156] Total swap = 0kB [ 191.035156] 130944 pages RAM [ 191.035156] 0 pages HighMem/MovableOnly [ 191.035156] 1 pages reserved [ 191.035156] SLUB: Unable to allocate memory on node -1 (gfp=0xd1) [ 191.035156] cache: dma-kmalloc-512, object size: 512, buffer size: 512, default order: 0, min order: 0 [ 191.035156] node 0: slabs: 0, objs: 0, free: 0 [ 191.035156] sr: out of memory. [ 191.035156] sr 5:0:0:1: Attached scsi CD-ROM sr1 [ 191.035156] sr 5:0:0:1: Attached scsi generic sg4 type 5 [ 191.039062] sd 5:0:0:0: [sdc] No Caching mode page found [ 191.039062] sd 5:0:0:0: [sdc] Assuming drive cache: write through [ 191.062500] sdc: sdc1 [ 191.066406] sd 5:0:0:0: [sdc] Attached SCSI removable disk [ 263.824218] EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem [ 263.847656] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
pgp4GFhebGM5F.pgp
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