Hi, The following page allocation failure triggers sometimes when I plug my memory card reader on a USB port. [850845.928795] usb 1-4: new high-speed USB device number 48 using ehci-pci [850846.300702] usb 1-4: New USB device found, idVendor=0bda, idProduct=0119 [850846.300707] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [850846.300711] usb 1-4: Product: USB2.0-CRW [850846.300715] usb 1-4: Manufacturer: Generic [850846.300718] usb 1-4: SerialNumber: 20090815198100000 [850846.302733] scsi86 : usb-storage 1-4:1.0 [850847.304359] scsi 86:0:0:0: Direct-Access Generic- SD/MMC 1.00 PQ: 0 ANSI: 0 CCS [850847.305734] sd 86:0:0:0: Attached scsi generic sg4 type 0 [850848.456294] sd 86:0:0:0: [sdd] 7911424 512-byte logical blocks: (4.05 GB/3.77 GiB) [850848.457160] sd 86:0:0:0: [sdd] Write Protect is off [850848.457166] sd 86:0:0:0: [sdd] Mode Sense: 03 00 00 00 [850848.458054] sd 86:0:0:0: [sdd] No Caching mode page present [850848.458060] sd 86:0:0:0: [sdd] Assuming drive cache: write through [850848.461502] sd 86:0:0:0: [sdd] No Caching mode page present [850848.461507] sd 86:0:0:0: [sdd] Assuming drive cache: write through [850848.461963] kworker/u:0: page allocation failure: order:4, mode:0x2000d0 [850848.461969] Pid: 7122, comm: kworker/u:0 Tainted: G W 3.8.0-rc4+ #206 [850848.461972] Call Trace: [850848.461984] [<ffffffff810d02a8>] ? warn_alloc_failed+0x116/0x128 [850848.461991] [<ffffffff810d31d9>] ? __alloc_pages_nodemask+0x6b5/0x751 [850848.462000] [<ffffffff81106297>] ? kmem_getpages+0x59/0x129 [850848.462006] [<ffffffff81106b88>] ? fallback_alloc+0x12f/0x1fc [850848.462013] [<ffffffff811071c7>] ? kmem_cache_alloc_trace+0x87/0xf6 [850848.462021] [<ffffffff812a633c>] ? check_partition+0x28/0x1ac [850848.462027] [<ffffffff812a60bd>] ? rescan_partitions+0xa4/0x27c [850848.462034] [<ffffffff8113bcfb>] ? __blkdev_get+0x1ac/0x3d2 [850848.462040] [<ffffffff8113c0b1>] ? blkdev_get+0x190/0x2d8 [850848.462046] [<ffffffff8113b23f>] ? bdget+0x3b/0x12b [850848.462052] [<ffffffff812a41a6>] ? add_disk+0x268/0x3e2 [850848.462058] [<ffffffff81382f3d>] ? sd_probe_async+0x11b/0x1cc [850848.462066] [<ffffffff81055f74>] ? async_run_entry_fn+0xa2/0x173 [850848.462072] [<ffffffff81055ed2>] ? async_schedule+0x15/0x15 [850848.462079] [<ffffffff8104bb79>] ? process_one_work+0x172/0x2ca [850848.462084] [<ffffffff8104b88a>] ? manage_workers+0x22a/0x23c [850848.462090] [<ffffffff81055ed2>] ? async_schedule+0x15/0x15 [850848.462096] [<ffffffff8104bfa4>] ? worker_thread+0x11d/0x1b7 [850848.462102] [<ffffffff8104be87>] ? rescuer_thread+0x18c/0x18c [850848.462109] [<ffffffff81050421>] ? kthread+0x86/0x8e [850848.462116] [<ffffffff8105039b>] ? __kthread_parkme+0x60/0x60 [850848.462125] [<ffffffff814a306c>] ? ret_from_fork+0x7c/0xb0 [850848.462132] [<ffffffff8105039b>] ? __kthread_parkme+0x60/0x60 [850848.462135] Mem-Info: [850848.462138] Node 0 DMA per-cpu: [850848.462143] CPU 0: hi: 0, btch: 1 usd: 0 [850848.462147] CPU 1: hi: 0, btch: 1 usd: 0 [850848.462151] CPU 2: hi: 0, btch: 1 usd: 0 [850848.462154] CPU 3: hi: 0, btch: 1 usd: 0 [850848.462158] CPU 4: hi: 0, btch: 1 usd: 0 [850848.462161] CPU 5: hi: 0, btch: 1 usd: 0 [850848.462165] CPU 6: hi: 0, btch: 1 usd: 0 [850848.462168] CPU 7: hi: 0, btch: 1 usd: 0 [850848.462171] Node 0 DMA32 per-cpu: [850848.462176] CPU 0: hi: 186, btch: 31 usd: 0 [850848.462180] CPU 1: hi: 186, btch: 31 usd: 0 [850848.462183] CPU 2: hi: 186, btch: 31 usd: 0 [850848.462185] CPU 3: hi: 186, btch: 31 usd: 0 [850848.462187] CPU 4: hi: 186, btch: 31 usd: 0 [850848.462189] CPU 5: hi: 186, btch: 31 usd: 0 [850848.462192] CPU 6: hi: 186, btch: 31 usd: 0 [850848.462194] CPU 7: hi: 186, btch: 31 usd: 0 [850848.462196] Node 0 Normal per-cpu: [850848.462199] CPU 0: hi: 186, btch: 31 usd: 0 [850848.462201] CPU 1: hi: 186, btch: 31 usd: 0 [850848.462203] CPU 2: hi: 186, btch: 31 usd: 0 [850848.462206] CPU 3: hi: 186, btch: 31 usd: 0 [850848.462208] CPU 4: hi: 186, btch: 31 usd: 0 [850848.462210] CPU 5: hi: 186, btch: 31 usd: 0 [850848.462212] CPU 6: hi: 186, btch: 31 usd: 0 [850848.462215] CPU 7: hi: 186, btch: 31 usd: 0 [850848.462222] active_anon:24837 inactive_anon:19982 isolated_anon:0 [850848.462222] active_file:452273 inactive_file:418905 isolated_file:32 [850848.462222] unevictable:0 dirty:2445 writeback:0 unstable:0 [850848.462222] free:66997 slab_reclaimable:515526 slab_unreclaimable:12480 [850848.462222] mapped:4698 shmem:82 pagetables:2389 bounce:0 [850848.462222] free_cma:0 [850848.462228] Node 0 DMA free:15904kB min:168kB low:208kB high:252kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15680kB managed:15904kB 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 [850848.462237] lowmem_reserve[]: 0 3012 6042 6042 [850848.462242] Node 0 DMA32 free:167276kB min:33604kB low:42004kB high:50404kB active_anon:0kB inactive_anon:3888kB active_file:1009068kB inactive_file:932732kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3084512kB managed:3051044kB mlocked:0kB dirty:3440kB writeback:0kB mapped:1748kB shmem:8kB slab_reclaimable:927596kB slab_unreclaimable:10460kB kernel_stack:64kB pagetables:336kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [850848.462251] lowmem_reserve[]: 0 0 3030 3030 [850848.462256] Node 0 Normal free:84808kB min:33804kB low:42252kB high:50704kB active_anon:99348kB inactive_anon:76040kB active_file:800024kB inactive_file:742888kB unevictable:0kB isolated(anon):0kB isolated(file):128kB present:3102720kB managed:3055508kB mlocked:0kB dirty:6340kB writeback:0kB mapped:17044kB shmem:320kB slab_reclaimable:1134508kB slab_unreclaimable:39460kB kernel_stack:2760kB pagetables:9220kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no [850848.462265] lowmem_reserve[]: 0 0 0 0 [850848.462269] Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (R) 3*4096kB (M) = 15904kB [850848.462287] Node 0 DMA32: 15740*4kB (UEM) 8959*8kB (UEM) 1829*16kB (UEM) 52*32kB (UEM) 0*64kB 1*128kB (R) 1*256kB (R) 0*512kB 1*1024kB (R) 1*2048kB (R) 0*4096kB = 169016kB [850848.462305] Node 0 Normal: 11559*4kB (UEM) 4308*8kB (UEM) 110*16kB (UEM) 2*32kB (R) 1*64kB (R) 0*128kB 1*256kB (R) 1*512kB (R) 1*1024kB (R) 1*2048kB (R) 0*4096kB = 86428kB [850848.462324] 873577 total pagecache pages [850848.462326] 2290 pages in swap cache [850848.462328] Swap cache stats: add 100017, delete 97727, find 335070/338652 [850848.462330] Free swap = 11973912kB [850848.462332] Total swap = 12037116kB [850848.499266] 1572848 pages RAM [850848.499269] 41638 pages reserved [850848.499271] 910353 pages shared [850848.499272] 962690 pages non-shared [850848.499276] SLAB: Unable to allocate memory on node 0 (gfp=0xd0) [850848.499279] cache: size-65536, object size: 65536, order: 4 [850848.499286] node 0: slabs: 42/42, objs: 42/42, free: 0 [850848.502355] sd 86:0:0:0: [sdd] No Caching mode page present [850848.502361] sd 86:0:0:0: [sdd] Assuming drive cache: write through [850848.502366] sd 86:0:0:0: [sdd] Attached SCSI removable disk -- balbi
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