Hi, [sorry if this is not the right point for reporting bugs, I took the email addresses from MAINTAINERS but please point me to the correct place if needed]
I have an external USB drive (Samsung M3), which apparently uses the UAS code. Starting with 4.4 (from Debian sid, I could retry with vanilla if needed), I can't mount the drive anymore after a while (few hours/days uptime). Just plugging the disk, I get page allocation failure in kernel logs: Feb 22 10:57:56 scapa kernel: [26557.268872] usb 2-2: new SuperSpeed USB device number 3 using xhci_hcd Feb 22 10:57:56 scapa kernel: [26557.285884] usb 2-2: New USB device found, idVendor=04e8, idProduct=61b6 Feb 22 10:57:56 scapa kernel: [26557.285888] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Feb 22 10:57:56 scapa kernel: [26557.285891] usb 2-2: Product: Samsung M3 Portable Feb 22 10:57:56 scapa kernel: [26557.285893] usb 2-2: Manufacturer: Samsung M3 Portable Feb 22 10:57:56 scapa kernel: [26557.285895] usb 2-2: SerialNumber: 826C7DFB13000067 Feb 22 10:57:56 scapa kernel: [26557.293693] scsi host4: uas Feb 22 10:57:56 scapa kernel: [26557.293707] kworker/0:0: page allocation failure: order:7, mode:0x2204020 Feb 22 10:57:56 scapa kernel: [26557.293711] CPU: 0 PID: 11015 Comm: kworker/0:0 Tainted: G W 4.4.0-1-amd64 #1 Debian 4.4.2-3~a.test Feb 22 10:57:56 scapa kernel: [26557.293713] Hardware name: LENOVO 20CMCTO1WW/20CMCTO1WW, BIOS N10ET41W (1.20 ) 01/19/2016 Feb 22 10:57:56 scapa kernel: [26557.293724] Workqueue: usb_hub_wq hub_event [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293727] 0000000000000000 00000000c0207f69 ffffffff812e7679 0000000002204020 Feb 22 10:57:56 scapa kernel: [26557.293730] ffffffff8116b23a 00000001c0207f69 0000000000000000 ffff88024dffbb20 Feb 22 10:57:56 scapa kernel: [26557.293733] ffffffff810b475e 00000001020c8220 00000000c0207f69 0000000000000046 Feb 22 10:57:56 scapa kernel: [26557.293736] Call Trace: Feb 22 10:57:56 scapa kernel: [26557.293741] [<ffffffff812e7679>] ? dump_stack+0x40/0x57 Feb 22 10:57:56 scapa kernel: [26557.293745] [<ffffffff8116b23a>] ? warn_alloc_failed+0xfa/0x150 Feb 22 10:57:56 scapa kernel: [26557.293749] [<ffffffff810b475e>] ? __wake_up_common+0x4e/0x90 Feb 22 10:57:56 scapa kernel: [26557.293752] [<ffffffff8116e7d6>] ? __alloc_pages_nodemask+0x306/0xb70 Feb 22 10:57:56 scapa kernel: [26557.293757] [<ffffffff811ba191>] ? kmem_getpages+0x51/0xf0 Feb 22 10:57:56 scapa kernel: [26557.293759] [<ffffffff811bbe05>] ? fallback_alloc+0x145/0x1f0 Feb 22 10:57:56 scapa kernel: [26557.293765] [<ffffffff812bd908>] ? init_tag_map+0x38/0xb0 Feb 22 10:57:56 scapa kernel: [26557.293768] [<ffffffff811bd29f>] ? __kmalloc+0x17f/0x1c0 Feb 22 10:57:56 scapa kernel: [26557.293771] [<ffffffff812bd908>] ? init_tag_map+0x38/0xb0 Feb 22 10:57:56 scapa kernel: [26557.293774] [<ffffffff812bd9c0>] ? __blk_queue_init_tags+0x40/0x80 Feb 22 10:57:56 scapa kernel: [26557.293781] [<ffffffffa013445b>] ? scsi_add_host_with_dma+0x7b/0x2f0 [scsi_mod] Feb 22 10:57:56 scapa kernel: [26557.293785] [<ffffffffa08783ba>] ? uas_probe+0x41a/0x560 [uas] Feb 22 10:57:56 scapa kernel: [26557.293796] [<ffffffffa00d3c03>] ? usb_probe_interface+0x1b3/0x300 [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293801] [<ffffffff8140dbc2>] ? driver_probe_device+0x212/0x480 Feb 22 10:57:56 scapa kernel: [26557.293803] [<ffffffff8140deb0>] ? __driver_attach+0x80/0x80 Feb 22 10:57:56 scapa kernel: [26557.293806] [<ffffffff8140b8c2>] ? bus_for_each_drv+0x62/0xb0 Feb 22 10:57:56 scapa kernel: [26557.293809] [<ffffffff8140d8c8>] ? __device_attach+0xd8/0x160 Feb 22 10:57:56 scapa kernel: [26557.293811] [<ffffffff8140cbc7>] ? bus_probe_device+0x87/0xa0 Feb 22 10:57:56 scapa kernel: [26557.293814] [<ffffffff8140a8e5>] ? device_add+0x3f5/0x660 Feb 22 10:57:56 scapa kernel: [26557.293823] [<ffffffffa00d1c2b>] ? usb_set_configuration+0x51b/0x8f0 [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293835] [<ffffffffa00dbfa8>] ? generic_probe+0x28/0x80 [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293838] [<ffffffff8140dbc2>] ? driver_probe_device+0x212/0x480 Feb 22 10:57:56 scapa kernel: [26557.293840] [<ffffffff8140deb0>] ? __driver_attach+0x80/0x80 Feb 22 10:57:56 scapa kernel: [26557.293842] [<ffffffff8140b8c2>] ? bus_for_each_drv+0x62/0xb0 Feb 22 10:57:56 scapa kernel: [26557.293845] [<ffffffff8140d8c8>] ? __device_attach+0xd8/0x160 Feb 22 10:57:56 scapa kernel: [26557.293847] [<ffffffff8140cbc7>] ? bus_probe_device+0x87/0xa0 Feb 22 10:57:56 scapa kernel: [26557.293850] [<ffffffff8140a8e5>] ? device_add+0x3f5/0x660 Feb 22 10:57:56 scapa kernel: [26557.293857] [<ffffffffa00c7545>] ? usb_new_device+0x265/0x490 [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293864] [<ffffffffa00c96e3>] ? hub_event+0xfb3/0x14f0 [usbcore] Feb 22 10:57:56 scapa kernel: [26557.293868] [<ffffffff8108d84f>] ? process_one_work+0x19f/0x3d0 Feb 22 10:57:56 scapa kernel: [26557.293871] [<ffffffff8108dacd>] ? worker_thread+0x4d/0x450 Feb 22 10:57:56 scapa kernel: [26557.293873] [<ffffffff8108da80>] ? process_one_work+0x3d0/0x3d0 Feb 22 10:57:56 scapa kernel: [26557.293876] [<ffffffff8109385d>] ? kthread+0xcd/0xf0 Feb 22 10:57:56 scapa kernel: [26557.293879] [<ffffffff81093790>] ? kthread_create_on_node+0x190/0x190 Feb 22 10:57:56 scapa kernel: [26557.293883] [<ffffffff81589c0f>] ? ret_from_fork+0x3f/0x70 Feb 22 10:57:56 scapa kernel: [26557.293886] [<ffffffff81093790>] ? kthread_create_on_node+0x190/0x190 Feb 22 10:57:56 scapa kernel: [26557.293888] Mem-Info: Feb 22 10:57:56 scapa kernel: [26557.293892] active_anon:1100571 inactive_anon:668265 isolated_anon:0 Feb 22 10:57:56 scapa kernel: [26557.293892] active_file:76007 inactive_file:57114 isolated_file:0 Feb 22 10:57:56 scapa kernel: [26557.293892] unevictable:22 dirty:7 writeback:0 unstable:0 Feb 22 10:57:56 scapa kernel: [26557.293892] slab_reclaimable:37128 slab_unreclaimable:28425 Feb 22 10:57:56 scapa kernel: [26557.293892] mapped:51000 shmem:993293 pagetables:11591 bounce:0 Feb 22 10:57:56 scapa kernel: [26557.293892] free:40735 free_pcp:706 free_cma:0 Feb 22 10:57:56 scapa kernel: [26557.293898] Node 0 DMA32 free:64580kB min:3908kB low:4884kB high:5860kB active_anon:1473104kB inactive_anon:957504kB active_file:105844kB inactive_file:80920kB unevictable:88kB isolated(anon):0kB isolated(file):0kB present:2814324kB managed:2803768kB mlocked:88kB dirty:12kB writeback:0kB mapped:72980kB shmem:1357128kB slab_reclaimable:50220kB slab_unreclaimable:37872kB kernel_stack:3040kB pagetables:16520kB unstable:0kB bounce:0kB free_pcp:1256kB local_pcp:236kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no Feb 22 10:57:56 scapa kernel: [26557.293904] lowmem_reserve[]: 0 5214 5214 5214 Feb 22 10:57:56 scapa kernel: [26557.293908] Node 0 Normal free:98360kB min:7452kB low:9312kB high:11176kB active_anon:2929180kB inactive_anon:1715556kB active_file:198184kB inactive_file:147536kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:5472256kB managed:5339884kB mlocked:34359738368kB dirty:16kB writeback:0kB mapped:131020kB shmem:2616044kB slab_reclaimable:98292kB slab_unreclaimable:75828kB kernel_stack:5600kB pagetables:29844kB unstable:0kB bounce:0kB free_pcp:1568kB local_pcp:240kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no Feb 22 10:57:56 scapa kernel: [26557.293914] lowmem_reserve[]: 0 0 0 0 Feb 22 10:57:56 scapa kernel: [26557.293917] Node 0 DMA32: 6976*4kB (UE) 3758*8kB (UME) 358*16kB (UME) 16*32kB (UME) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 64208kB Feb 22 10:57:56 scapa kernel: [26557.293928] Node 0 Normal: 13439*4kB (UME) 5329*8kB (UME) 100*16kB (UE) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 97988kB Feb 22 10:57:56 scapa kernel: [26557.293938] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Feb 22 10:57:56 scapa kernel: [26557.293940] 1127321 total pagecache pages Feb 22 10:57:56 scapa kernel: [26557.293942] 830 pages in swap cache Feb 22 10:57:56 scapa kernel: [26557.293944] Swap cache stats: add 35025, delete 34195, find 288/383 Feb 22 10:57:56 scapa kernel: [26557.293945] Free swap = 3007972kB Feb 22 10:57:56 scapa kernel: [26557.293946] Total swap = 3145724kB Feb 22 10:57:56 scapa kernel: [26557.293948] 2071645 pages RAM Feb 22 10:57:56 scapa kernel: [26557.293949] 0 pages HighMem/MovableOnly Feb 22 10:57:56 scapa kernel: [26557.293950] 35732 pages reserved Feb 22 10:57:56 scapa kernel: [26557.293951] 0 pages hwpoisoned Feb 22 10:57:56 scapa kernel: [26557.295059] uas: probe of 2-2:1.0 failed with error -12 order 7 seems like a lot to allocate, let alone atomically. If you need anything more, please ask. Regards, -- Yves-Alexis
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