qianfan <qianfanguijin@xxxxxxx> writes: > Hi: > > I am tesing usb storage on linux v5.15, found that the system is resetting when the > usb storage(fat32 format) was removed while copying. Besides my custom board > has a gpio-watchdog with 1.6s timeout. Looks like I/O error by unplugging usb while reading data pages for readahead, then your watchdog detected some state to reset system. If you disabled watchdog, it works as normal soon or later? If so, FAT would not be able to do much (maybe ratelimit I/O error to mitigate serial console overhead), request is from userspace or upper layer in kernel. Thanks. > Next is the console(ttyS0, 115200) logs when usb disconnected: > > [ 62.213788] usb 1-1: USB disconnect, device number 2 > [ 62.221589] blk_update_request: I/O error, dev sda, sector 16447 op 0x1:(WRITE) > flags 0x100000 phys_seg 1 prio class 0 > [ 62.232990] Buffer I/O error on dev sda1, logical block 16385, lost async page > write > [ 62.266159] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.271985] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.277828] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.283520] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.289219] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.294930] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.300595] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.306286] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.311964] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.317678] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.323376] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.329078] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.334773] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.340437] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.346139] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.351818] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.357506] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.363184] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.368872] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.374568] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.380233] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.385944] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.391623] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.397309] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.402987] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.408679] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.414384] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.420052] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.425746] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.431424] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.437120] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.442798] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.448501] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.454181] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.459869] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.465558] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.471224] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.476918] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.482598] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.488291] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.493970] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.499670] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.505362] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.511026] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.516715] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.522394] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.528084] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.533762] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.539448] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.545140] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.550804] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.556492] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.562170] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.567861] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.573541] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.579231] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.584923] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.590587] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.596277] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.601955] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.607653] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.613332] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.619018] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.624710] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.630393] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.636086] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.641763] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.647449] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.653127] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.658812] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.664503] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.670167] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.675857] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.681540] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.687227] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.692905] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.698590] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.704268] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.709953] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.715667] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.721333] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.727026] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.732709] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.738396] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.744074] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.749761] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.755451] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.761115] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.766806] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.772485] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.778172] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.783854] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.789540] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.795231] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.800896] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.806601] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.812281] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.817968] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.823646] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.829345] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.835043] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.840710] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.846400] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.852078] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.857766] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.863445] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.869130] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.874822] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.880487] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.886189] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.891869] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.897555] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.903234] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.908919] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.914610] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.920274] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.925963] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.931642] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.937344] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.943023] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.948710] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.954401] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.960065] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.965754] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.971431] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.977116] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.982797] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.988489] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.994168] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 62.999853] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.005541] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.011205] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.016895] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.022573] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.028258] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.033937] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.039635] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.045344] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.051009] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.056700] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.062378] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.068064] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.073742] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.079427] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.085121] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.090813] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.096505] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.102183] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.107869] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.113547] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.119243] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.124943] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.130607] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.136299] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.141982] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.147679] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.153358] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.159057] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.164749] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.170413] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.176112] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.181789] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.187477] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.193158] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.198851] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.204544] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.210208] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.215897] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.221575] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.227260] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.232937] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.238625] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.244325] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.249991] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.255681] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.261345] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.267047] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.272728] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.278415] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.284094] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.289787] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.295484] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.301149] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.306839] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.312516] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.318200] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.323877] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.329563] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.335253] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.340919] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.346612] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.352290] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.357975] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.363653] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.369338] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.375041] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.380706] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.386395] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.392074] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.397765] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.403444] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.409130] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.414820] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.420485] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.426173] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.431850] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.437535] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.443214] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.448911] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.454604] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.460268] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.465957] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.471635] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.477321] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.482998] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.488694] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.494388] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.500058] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.505748] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.511425] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.517110] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.522788] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.528474] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.534152] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.539836] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.545525] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.551194] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.556884] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.562562] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.568247] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.573925] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.579610] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.585301] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.590966] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.596667] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.602350] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.608037] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.613715] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.619400] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.625091] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.630755] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.636445] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.642122] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.647809] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.653491] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.659178] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.664868] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.670532] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.676229] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.681908] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.687594] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.693275] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.698961] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.704668] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.710333] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.716024] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.721701] FAT-fs (sda1): FAT read failed (blocknr 1162) > [ 63.727387▒ > U-Boot SPL 2022.01-rc1-00183-gfa5b4e2d19 (Feb 24 2022 - 15:48:38 +0800) > Trying to boot from NAND > > I add a backtrace on function "fat_ent_bread", next is the stack: > > [ 62.129550] usb 1-1: USB disconnect, device number 2 > [ 62.137279] blk_update_request: I/O error, dev sda, sector 16447 op 0x1:(WRITE) > flags 0x100000 phys_seg 1 prio class 0 > [ 62.148725] Buffer I/O error on dev sda1, logical block 16385, lost async page > write > [ 62.179800] ------------[ cut here ]------------ > [ 62.184749] WARNING: CPU: 0 PID: 362 at fs/fat/fatent.c:110 > fat_ent_bread+0xec/0x104 > [ 62.193072] fat_ent_bread > [ 62.193081] Modules linked in: > [ 62.199103] CPU: 0 PID: 362 Comm: gzip Not tainted > 5.15.0-00013-g0ccd7df8f5ad-dirty #132 > [ 62.207610] Hardware name: Generic AM33XX (Flattened Device Tree) > [ 62.214024] [<c0111438>] (unwind_backtrace) from [<c010b9f4>] > (show_stack+0x10/0x14) > [ 62.222186] [<c010b9f4>] (show_stack) from [<c0adc214>] > (dump_stack_lvl+0x40/0x4c) > [ 62.230165] [<c0adc214>] (dump_stack_lvl) from [<c0136264>] > (__warn+0xf0/0x104) > [ 62.237858] [<c0136264>] (__warn) from [<c01362ec>] > (warn_slowpath_fmt+0x74/0xbc) > [ 62.245722] [<c01362ec>] (warn_slowpath_fmt) from [<c042cdd0>] > (fat_ent_bread+0xec/0x104) > [ 62.254321] [<c042cdd0>] (fat_ent_bread) from [<c042d4f8>] > (fat_ent_read+0x1c8/0x258) > [ 62.262550] [<c042d4f8>] (fat_ent_read) from [<c0428b48>] > (fat_get_cluster+0x214/0x394) > [ 62.270982] [<c0428b48>] (fat_get_cluster) from [<c0428d70>] > (fat_get_mapped_cluster+0xa8/0x190) > [ 62.280221] [<c0428d70>] (fat_get_mapped_cluster) from [<c0431cf8>] > (fat_get_block+0x60/0x310) > [ 62.289277] [<c0431cf8>] (fat_get_block) from [<c033622c>] > (do_mpage_readpage+0x298/0x92c) > [ 62.297973] [<c033622c>] (do_mpage_readpage) from [<c0336960>] > (mpage_readahead+0xa0/0x154) > [ 62.306751] [<c0336960>] (mpage_readahead) from [<c02725d4>] > (read_pages+0x80/0x244) > [ 62.314878] [<c02725d4>] (read_pages) from [<c02728f0>] > (page_cache_ra_unbounded+0x158/0x210) > [ 62.323818] [<c02728f0>] (page_cache_ra_unbounded) from [<c02628e4>] > (filemap_readahead+0x64/0x8c) > [ 62.333222] [<c02628e4>] (filemap_readahead) from [<c0268024>] > (filemap_read+0x55c/0x9f4) > [ 62.341802] [<c0268024>] (filemap_read) from [<c02e69d0>] > (vfs_read+0x278/0x2f8) > [ 62.349573] [<c02e69d0>] (vfs_read) from [<c02e6f08>] > (ksys_read+0xa8/0xd8) > [ 62.356878] [<c02e6f08>] (ksys_read) from [<c0100080>] > (ret_fast_syscall+0x0/0x48) > [ 62.364818] Exception stack(0xc2b8dfa8 to 0xc2b8dff0) > [ 62.370116] dfa0: 00000000 00000000 00000000 004f1144 00003ffc > ffffffff > [ 62.378685] dfc0: 00000000 00000000 004f1144 00000003 004ee6bc 00000009 > 00000004 6232e5a0 > [ 62.387252] dfe0: 00000000 be973b4c 0041ea7c b6ec2af8 > [ 62.392732] ---[ end trace 28fb7741fb0db033 ]--- > > I can't detect wether this problem is caused by fat(maybe fs) or usb. > > Thanks. > -- OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
