Hello, I tried "make check" of ndctl command on the kernel of libnvdimm-for-next branch(*), but I feel its kernel is unstable when nfit_test.ko module is loaded. (*) git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm libnvdimm-for-next The newest commit is f5705aa8cfed Here is console logs when the kernel was paniced, and I'll attach the kernel config file. Does anyone know how to solve this? Am I something wrong?

On 2017年05月30日 08:04, Dan Williams wrote: > > On Mon, May 29, 2017 at 7:21 AM, Yasunori Goto <ygotopersonal(a)gmail.com&gt; > wrote: >> >> Hello, >> I tried "make check" of ndctl command on the kernel of libnvdimm-for-next >> branch(*), >> but I feel its kernel is unstable when nfit_test.ko module is loaded. >> >> (*) git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm >> libnvdimm-for-next >> The newest commit is f5705aa8cfed >> >> Here is console logs when the kernel was paniced, and I'll attach the >> kernel >> config file. >> >> Does anyone know how to solve this? Am I something wrong? > > No, you're not doing anything wrong. This is a known issue that I am > investigating. The reports of this usually come from distributions > with older module loading infrastructure. If you can try with a recent > Fedora that would mimic the environment I normally use to test, Oh, I see. Certainly, I used CentOS7. Ok, I'll use Fedora environment. > but hopefully in the next week or so I'll root cause what is triggering > this on CentOS and Debian. Thanks, BTW, I could take the crash dump when this panic occurred. Is the crash dump helpful for your investigation of root cause? If yes, I'll upload the dump to google storage.

Hi, >> No, you're not doing anything wrong. This is a known issue that I am >> investigating. The reports of this usually come from distributions >> with older module loading infrastructure. If you can try with a recent >> Fedora that would mimic the environment I normally use to test, > > Oh, I see. Certainly, I used CentOS7. > Ok, I'll use Fedora environment. Hmmm, though I made Fedora 25 environment, this panic still occurs... I'll attach syslog and .config again.

[ 105.119978] nfit_test_iomap: loading out-of-tree module taints kernel. [ 105.306302] nfit_test nfit_test.0: found a zero length table '0' parsing nfit [ 106.573244] random: crng init done [ 107.339579] nfit_test nfit_test.0: failed to evaluate _FIT [ 107.358018] nfit_test nfit_test.1: nmem4 flags: save_fail restore_fail flush_fail not_armed [ 107.360586] nfit_test nfit_test.1: nmem5 flags: map_fail [ 107.480603] pmem4: detected capacity change from 0 to 18874368 [ 107.510795] pmem4: detected capacity change from 0 to 18874368 [ 107.539968] pmem4: detected capacity change from 0 to 18874368 [ 107.630683] pmem5: detected capacity change from 0 to 20971520 [ 107.662595] pmem5: detected capacity change from 0 to 20971520 [ 107.697813] pmem5: detected capacity change from 0 to 20971520 [ 107.738166] ndblk0.0: detected capacity change from 0 to 7340032 [ 107.768583] ndblk0.0: detected capacity change from 0 to 7340032 [ 107.797455] ndblk0.0: detected capacity change from 0 to 6524416 [ 107.823556] ndblk0.0: detected capacity change from 0 to 6524416 [ 107.853451] ndblk0.0: detected capacity change from 0 to 6524416 [ 107.883705] ndblk0.0: detected capacity change from 0 to 6524416 [ 107.913563] ndblk0.0: detected capacity change from 0 to 7340032 [ 107.948093] ndblk0.0: detected capacity change from 0 to 7340032 [ 107.982461] ndblk0.0: detected capacity change from 0 to 7225344 [ 108.015363] ndblk0.0: detected capacity change from 0 to 7225344 [ 108.046480] ndblk0.0: detected capacity change from 0 to 7225344 [ 108.071713] ndblk0.0: detected capacity change from 0 to 7225344 [ 108.098458] ndblk0.0: detected capacity change from 0 to 7114752 [ 108.127799] ndblk0.0: detected capacity change from 0 to 7114752 [ 108.133122] ndblk0.1: detected capacity change from 0 to 11534336 [ 108.162370] ndblk0.1: detected capacity change from 0 to 11534336 [ 108.192647] ndblk0.1: detected capacity change from 0 to 10252288 [ 108.218613] ndblk0.1: detected capacity change from 0 to 10252288 [ 108.248650] ndblk0.1: detected capacity change from 0 to 10252288 [ 108.276487] ndblk0.1: detected capacity change from 0 to 10252288 [ 108.307132] ndblk0.1: detected capacity change from 0 to 11534336 [ 108.336644] ndblk0.1: detected capacity change from 0 to 11534336 [ 108.366668] ndblk0.1: detected capacity change from 0 to 11354112 [ 108.399347] ndblk0.1: detected capacity change from 0 to 11354112 [ 108.428403] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 108.428679] pmem7: detected capacity change from 0 to 4194304 [ 108.439346] pmem6: detected capacity change from 0 to 33554432 [ 108.448567] ndblk0.1: detected capacity change from 0 to 11354112 [ 108.475539] ndblk0.1: detected capacity change from 0 to 11354112 [ 108.501562] ndblk0.1: detected capacity change from 0 to 11182080 [ 108.529544] ndblk0.1: detected capacity change from 0 to 11182080 [ 108.580854] ndblk0.1: detected capacity change from 0 to 7340032 [ 108.580861] ndblk0.0: detected capacity change from 0 to 11534336 [ 108.619809] ndblk0.1: detected capacity change from 0 to 7340032 [ 108.644717] ndblk0.0: detected capacity change from 0 to 11534336 [ 108.706521] ndblk1.0: detected capacity change from 0 to 7340032 [ 108.735577] ndblk1.0: detected capacity change from 0 to 7340032 [ 108.763659] ndblk1.0: detected capacity change from 0 to 6524416 [ 108.793613] ndblk1.0: detected capacity change from 0 to 6524416 [ 108.822612] ndblk1.0: detected capacity change from 0 to 6524416 [ 108.852674] ndblk1.0: detected capacity change from 0 to 6524416 [ 108.881684] ndblk1.0: detected capacity change from 0 to 7340032 [ 108.911788] ndblk1.0: detected capacity change from 0 to 7340032 [ 108.941352] ndblk1.0: detected capacity change from 0 to 7225344 [ 108.970375] ndblk1.0: detected capacity change from 0 to 7225344 [ 108.998504] ndblk1.0: detected capacity change from 0 to 7225344 [ 109.031416] ndblk1.0: detected capacity change from 0 to 7225344 [ 109.062783] ndblk1.0: detected capacity change from 0 to 7114752 [ 109.088454] ndblk1.0: detected capacity change from 0 to 7114752 [ 109.093521] ndblk1.1: detected capacity change from 0 to 11534336 [ 109.127332] ndblk1.1: detected capacity change from 0 to 11534336 [ 109.157533] ndblk1.1: detected capacity change from 0 to 10252288 [ 109.183291] ndblk1.1: detected capacity change from 0 to 10252288 [ 109.212336] ndblk1.1: detected capacity change from 0 to 10252288 [ 109.238434] ndblk1.1: detected capacity change from 0 to 10252288 [ 109.271471] ndblk1.1: detected capacity change from 0 to 11534336 [ 109.297386] ndblk1.1: detected capacity change from 0 to 11534336 [ 109.328372] ndblk1.1: detected capacity change from 0 to 11354112 [ 109.361400] ndblk1.1: detected capacity change from 0 to 11354112 [ 109.392430] ndblk1.1: detected capacity change from 0 to 11354112 [ 109.428406] ndblk1.1: detected capacity change from 0 to 11354112 [ 109.454491] ndblk1.1: detected capacity change from 0 to 11182080 [ 109.487353] ndblk1.1: detected capacity change from 0 to 11182080 [ 109.537879] ndblk1.1: detected capacity change from 0 to 7340032 [ 109.537967] ndblk1.0: detected capacity change from 0 to 11534336 [ 109.565350] ndblk1.1: detected capacity change from 0 to 7340032 [ 109.598463] ndblk1.0: detected capacity change from 0 to 11534336 [ 109.660689] ndblk2.0: detected capacity change from 0 to 28311552 [ 109.690525] ndblk2.0: detected capacity change from 0 to 28311552 [ 109.716581] ndblk2.0: detected capacity change from 0 to 25165824 [ 109.745327] ndblk2.0: detected capacity change from 0 to 25165824 [ 109.770396] ndblk2.0: detected capacity change from 0 to 25165824 [ 109.803360] ndblk2.0: detected capacity change from 0 to 25165824 [ 109.832330] ndblk2.0: detected capacity change from 0 to 28311552 [ 109.858490] ndblk2.0: detected capacity change from 0 to 28311552 [ 109.888490] ndblk2.0: detected capacity change from 0 to 27873280 [ 109.917227] ndblk2.0: detected capacity change from 0 to 27873280 [ 109.945591] ndblk2.0: detected capacity change from 0 to 27873280 [ 109.974347] ndblk2.0: detected capacity change from 0 to 27873280 [ 110.003344] ndblk2.0: detected capacity change from 0 to 27451392 [ 110.032411] ndblk2.0: detected capacity change from 0 to 27451392 [ 110.061529] ndblk2.0: detected capacity change from 0 to 28311552 [ 110.095333] ndblk2.0: detected capacity change from 0 to 28311552 [ 110.129210] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.156337] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.186749] ndblk3.0: detected capacity change from 0 to 25165824 [ 110.216575] ndblk3.0: detected capacity change from 0 to 25165824 [ 110.246734] ndblk3.0: detected capacity change from 0 to 25165824 [ 110.274606] ndblk3.0: detected capacity change from 0 to 25165824 [ 110.303706] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.332341] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.362347] ndblk3.0: detected capacity change from 0 to 27873280 [ 110.391318] ndblk3.0: detected capacity change from 0 to 27873280 [ 110.419590] ndblk3.0: detected capacity change from 0 to 27873280 [ 110.449602] ndblk3.0: detected capacity change from 0 to 27873280 [ 110.475609] ndblk3.0: detected capacity change from 0 to 27451392 [ 110.509744] ndblk3.0: detected capacity change from 0 to 27451392 [ 110.539967] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.568702] ndblk3.0: detected capacity change from 0 to 28311552 [ 110.637689] pmem4: detected capacity change from 0 to 18866176 [ 110.669552] pmem4: detected capacity change from 0 to 14700544 [ 110.700010] pmem4: detected capacity change from 0 to 14700544 [ 110.736370] pmem4: detected capacity change from 0 to 14700544 [ 110.767042] pmem4: detected capacity change from 0 to 18874368 [ 110.798402] pmem4: detected capacity change from 0 to 18874368 [ 110.828564] pmem4: detected capacity change from 0 to 18874368 [ 110.864839] pmem5: detected capacity change from 0 to 20963328 [ 110.899520] pmem5: detected capacity change from 0 to 16801792 [ 110.931500] pmem5: detected capacity change from 0 to 16801792 [ 110.965372] pmem5: detected capacity change from 0 to 16801792 [ 110.996902] pmem5: detected capacity change from 0 to 20971520 [ 111.028319] pmem5: detected capacity change from 0 to 20971520 [ 111.061723] pmem5: detected capacity change from 0 to 20971520 [ 111.096534] ndblk0.0: detected capacity change from 0 to 7340032 [ 111.126313] ndblk0.0: detected capacity change from 0 to 7340032 [ 111.155570] ndblk0.0: detected capacity change from 0 to 6524416 [ 111.188508] ndblk0.0: detected capacity change from 0 to 6524416 [ 111.218726] ndblk0.0: detected capacity change from 0 to 6524416 [ 111.248807] ndblk0.0: detected capacity change from 0 to 6524416 [ 111.279621] ndblk0.0: detected capacity change from 0 to 7340032 [ 111.309380] ndblk0.0: detected capacity change from 0 to 7340032 [ 111.343599] ndblk0.0: detected capacity change from 0 to 7225344 [ 111.371350] ndblk0.0: detected capacity change from 0 to 7225344 [ 111.396568] ndblk0.0: detected capacity change from 0 to 7225344 [ 111.422790] ndblk0.0: detected capacity change from 0 to 7225344 [ 111.449014] ndblk0.0: detected capacity change from 0 to 7114752 [ 111.479696] ndblk0.0: detected capacity change from 0 to 7114752 [ 111.484436] ndblk0.1: detected capacity change from 0 to 11534336 [ 111.511601] ndblk0.1: detected capacity change from 0 to 11534336 [ 111.537681] ndblk0.1: detected capacity change from 0 to 10252288 [ 111.562396] ndblk0.1: detected capacity change from 0 to 10252288 [ 111.589685] ndblk0.1: detected capacity change from 0 to 10252288 [ 111.619815] ndblk0.1: detected capacity change from 0 to 10252288 [ 111.646740] ndblk0.1: detected capacity change from 0 to 11534336 [ 111.676715] ndblk0.1: detected capacity change from 0 to 11534336 [ 111.702806] ndblk0.1: detected capacity change from 0 to 11354112 [ 111.729349] ndblk0.1: detected capacity change from 0 to 11354112 [ 111.756575] ndblk0.1: detected capacity change from 0 to 11354112 [ 111.787806] ndblk0.1: detected capacity change from 0 to 11354112 [ 111.817861] ndblk0.1: detected capacity change from 0 to 11182080 [ 111.846802] ndblk0.1: detected capacity change from 0 to 11182080 [ 111.898048] ndblk0.1: detected capacity change from 0 to 7340032 [ 111.898069] ndblk0.0: detected capacity change from 0 to 11534336 [ 111.926589] ndblk0.1: detected capacity change from 0 to 7340032 [ 111.954610] ndblk0.0: detected capacity change from 0 to 11534336 [ 112.013684] ndblk1.0: detected capacity change from 0 to 7340032 [ 112.041567] ndblk1.0: detected capacity change from 0 to 7340032 [ 112.067506] ndblk1.0: detected capacity change from 0 to 6524416 [ 112.099657] ndblk1.0: detected capacity change from 0 to 6524416 [ 112.128561] ndblk1.0: detected capacity change from 0 to 6524416 [ 112.160662] ndblk1.0: detected capacity change from 0 to 6524416 [ 112.190756] ndblk1.0: detected capacity change from 0 to 7340032 [ 112.220656] ndblk1.0: detected capacity change from 0 to 7340032 [ 112.253664] ndblk1.0: detected capacity change from 0 to 7225344 [ 112.283519] ndblk1.0: detected capacity change from 0 to 7225344 [ 112.309701] ndblk1.0: detected capacity change from 0 to 7225344 [ 112.342567] ndblk1.0: detected capacity change from 0 to 7225344 [ 112.372528] ndblk1.0: detected capacity change from 0 to 7114752 [ 112.405435] ndblk1.0: detected capacity change from 0 to 7114752 [ 112.409926] ndblk1.1: detected capacity change from 0 to 11534336 [ 112.438331] ndblk1.1: detected capacity change from 0 to 11534336 [ 112.466617] ndblk1.1: detected capacity change from 0 to 10252288 [ 112.497657] ndblk1.1: detected capacity change from 0 to 10252288 [ 112.528683] ndblk1.1: detected capacity change from 0 to 10252288 [ 112.562610] ndblk1.1: detected capacity change from 0 to 10252288 [ 112.595812] ndblk1.1: detected capacity change from 0 to 11534336 [ 112.625853] ndblk1.1: detected capacity change from 0 to 11534336 [ 112.655840] ndblk1.1: detected capacity change from 0 to 11354112 [ 112.685837] ndblk1.1: detected capacity change from 0 to 11354112 [ 112.715739] ndblk1.1: detected capacity change from 0 to 11354112 [ 112.743641] ndblk1.1: detected capacity change from 0 to 11354112 [ 112.775647] ndblk1.1: detected capacity change from 0 to 11182080 [ 112.803627] ndblk1.1: detected capacity change from 0 to 11182080 [ 112.856962] ndblk1.0: detected capacity change from 0 to 11534336 [ 112.871023] ndblk1.1: detected capacity change from 0 to 7340032 [ 112.898543] ndblk1.1: detected capacity change from 0 to 7340032 [ 112.928733] ndblk1.0: detected capacity change from 0 to 11534336 [ 112.988305] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.015628] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.047834] ndblk2.0: detected capacity change from 0 to 25165824 [ 113.077795] ndblk2.0: detected capacity change from 0 to 25165824 [ 113.119912] ndblk2.0: detected capacity change from 0 to 25165824 [ 113.148630] ndblk2.0: detected capacity change from 0 to 25165824 [ 113.177691] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.206434] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.235665] ndblk2.0: detected capacity change from 0 to 27873280 [ 113.265569] ndblk2.0: detected capacity change from 0 to 27873280 [ 113.293662] ndblk2.0: detected capacity change from 0 to 27873280 [ 113.322613] ndblk2.0: detected capacity change from 0 to 27873280 [ 113.351621] ndblk2.0: detected capacity change from 0 to 27451392 [ 113.380707] ndblk2.0: detected capacity change from 0 to 27451392 [ 113.414204] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.445534] ndblk2.0: detected capacity change from 0 to 28311552 [ 113.479150] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.508569] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.539519] ndblk3.0: detected capacity change from 0 to 25165824 [ 113.571755] ndblk3.0: detected capacity change from 0 to 25165824 [ 113.601544] ndblk3.0: detected capacity change from 0 to 25165824 [ 113.631450] ndblk3.0: detected capacity change from 0 to 25165824 [ 113.661343] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.690698] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.720616] ndblk3.0: detected capacity change from 0 to 27873280 [ 113.746796] ndblk3.0: detected capacity change from 0 to 27873280 [ 113.775765] ndblk3.0: detected capacity change from 0 to 27873280 [ 113.804548] ndblk3.0: detected capacity change from 0 to 27873280 [ 113.834762] ndblk3.0: detected capacity change from 0 to 27451392 [ 113.865715] ndblk3.0: detected capacity change from 0 to 27451392 [ 113.900500] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.929600] ndblk3.0: detected capacity change from 0 to 28311552 [ 113.980479] nd_pmem btt4.0: No existing arenas [ 113.983934] pmem4s: detected capacity change from 0 to 18564096 [ 114.020170] pmem4s: detected capacity change from 0 to 18564096 [ 114.053960] pmem4s: detected capacity change from 0 to 18564096 [ 114.088905] pmem4s: detected capacity change from 0 to 148512768 [ 114.123022] pmem4s: detected capacity change from 0 to 148512768 [ 114.156559] pmem4s: detected capacity change from 0 to 148512768 [ 114.192973] pmem4s: detected capacity change from 0 to 148512768 [ 114.227204] pmem4s: detected capacity change from 0 to 18564096 [ 114.262795] pmem4s: detected capacity change from 0 to 18564096 [ 114.296797] pmem4: detected capacity change from 0 to 18874368 [ 114.332711] pmem4: detected capacity change from 0 to 18874368 [ 114.362463] pmem4: detected capacity change from 0 to 18874368 [ 114.400217] nd_pmem btt5.0: No existing arenas [ 114.404187] pmem5s: detected capacity change from 0 to 20644864 [ 114.442874] pmem5s: detected capacity change from 0 to 20644864 [ 114.480026] pmem5s: detected capacity change from 0 to 20644864 [ 114.515993] pmem5s: detected capacity change from 0 to 165158912 [ 114.552262] pmem5s: detected capacity change from 0 to 165158912 [ 114.592288] pmem5s: detected capacity change from 0 to 165158912 [ 114.628456] pmem5s: detected capacity change from 0 to 165158912 [ 114.667815] pmem5s: detected capacity change from 0 to 20644864 [ 114.698337] pmem5s: detected capacity change from 0 to 20644864 [ 114.727759] pmem5: detected capacity change from 0 to 20971520 [ 114.759815] pmem5: detected capacity change from 0 to 20971520 [ 114.792048] pmem5: detected capacity change from 0 to 20971520 [ 114.827093] ndblk0.0: detected capacity change from 0 to 7340032 [ 114.855851] ndblk0.0: detected capacity change from 0 to 7340032 [ 114.882503] ndblk0.0: detected capacity change from 0 to 6524416 [ 114.912396] ndblk0.0: detected capacity change from 0 to 6524416 [ 114.942545] ndblk0.0: detected capacity change from 0 to 6524416 [ 114.972699] ndblk0.0: detected capacity change from 0 to 6524416 [ 115.003739] ndblk0.0: detected capacity change from 0 to 7340032 [ 115.032844] ndblk0.0: detected capacity change from 0 to 7340032 [ 115.058561] ndblk0.0: detected capacity change from 0 to 7225344 [ 115.084344] ndblk0.0: detected capacity change from 0 to 7225344 [ 115.113604] ndblk0.0: detected capacity change from 0 to 7225344 [ 115.144313] ndblk0.0: detected capacity change from 0 to 7225344 [ 115.173577] ndblk0.0: detected capacity change from 0 to 7114752 [ 115.201318] ndblk0.0: detected capacity change from 0 to 7114752 [ 115.206551] ndblk0.1: detected capacity change from 0 to 11534336 [ 115.233525] ndblk0.1: detected capacity change from 0 to 11534336 [ 115.261761] ndblk0.1: detected capacity change from 0 to 10252288 [ 115.290866] ndblk0.1: detected capacity change from 0 to 10252288 [ 115.319724] ndblk0.1: detected capacity change from 0 to 10252288 [ 115.348726] ndblk0.1: detected capacity change from 0 to 10252288 [ 115.375692] ndblk0.1: detected capacity change from 0 to 11534336 [ 115.402375] ndblk0.1: detected capacity change from 0 to 11534336 [ 115.428721] ndblk0.1: detected capacity change from 0 to 11354112 [ 115.457458] ndblk0.1: detected capacity change from 0 to 11354112 [ 115.487723] ndblk0.1: detected capacity change from 0 to 11354112 [ 115.517554] ndblk0.1: detected capacity change from 0 to 11354112 [ 115.547857] ndblk0.1: detected capacity change from 0 to 11182080 [ 115.576733] ndblk0.1: detected capacity change from 0 to 11182080 [ 115.627671] ndblk0.0: detected capacity change from 0 to 11534336 [ 115.627688] ndblk0.1: detected capacity change from 0 to 7340032 [ 115.659725] ndblk0.1: detected capacity change from 0 to 7340032 [ 115.689442] ndblk0.0: detected capacity change from 0 to 11534336 [ 115.745343] ndblk1.0: detected capacity change from 0 to 7340032 [ 115.775727] ndblk1.0: detected capacity change from 0 to 7340032 [ 115.805728] ndblk1.0: detected capacity change from 0 to 6524416 [ 115.831536] ndblk1.0: detected capacity change from 0 to 6524416 [ 115.861891] ndblk1.0: detected capacity change from 0 to 6524416 [ 115.891832] ndblk1.0: detected capacity change from 0 to 6524416 [ 115.921839] ndblk1.0: detected capacity change from 0 to 7340032 [ 115.951448] ndblk1.0: detected capacity change from 0 to 7340032 [ 115.977690] ndblk1.0: detected capacity change from 0 to 7225344 [ 116.010474] ndblk1.0: detected capacity change from 0 to 7225344 [ 116.039340] ndblk1.0: detected capacity change from 0 to 7225344 [ 116.065740] ndblk1.0: detected capacity change from 0 to 7225344 [ 116.095687] ndblk1.0: detected capacity change from 0 to 7114752 [ 116.124474] ndblk1.0: detected capacity change from 0 to 7114752 [ 116.130332] ndblk1.1: detected capacity change from 0 to 11534336 [ 116.156512] ndblk1.1: detected capacity change from 0 to 11534336 [ 116.186542] ndblk1.1: detected capacity change from 0 to 10252288 [ 116.223188] ndblk1.1: detected capacity change from 0 to 10252288 [ 116.250695] ndblk1.1: detected capacity change from 0 to 10252288 [ 116.280524] ndblk1.1: detected capacity change from 0 to 10252288 [ 116.306568] ndblk1.1: detected capacity change from 0 to 11534336 [ 116.335389] ndblk1.1: detected capacity change from 0 to 11534336 [ 116.365484] ndblk1.1: detected capacity change from 0 to 11354112 [ 116.390303] ndblk1.1: detected capacity change from 0 to 11354112 [ 116.418332] ndblk1.1: detected capacity change from 0 to 11354112 [ 116.444226] ndblk1.1: detected capacity change from 0 to 11354112 [ 116.469322] ndblk1.1: detected capacity change from 0 to 11182080 [ 116.500557] ndblk1.1: detected capacity change from 0 to 11182080 [ 116.554723] ndblk1.0: detected capacity change from 0 to 11534336 [ 116.554895] ndblk1.1: detected capacity change from 0 to 7340032 [ 116.583641] ndblk1.1: detected capacity change from 0 to 7340032 [ 116.613324] ndblk1.0: detected capacity change from 0 to 11534336 [ 116.671228] nd_blk btt2.0: No existing arenas [ 116.675514] ndblk2.0s: detected capacity change from 0 to 27928064 [ 116.711302] ndblk2.0s: detected capacity change from 0 to 27928064 [ 116.750457] ndblk2.0s: detected capacity change from 0 to 27928064 [ 116.786165] ndblk2.0s: detected capacity change from 0 to 223424512 [ 116.821733] ndblk2.0s: detected capacity change from 0 to 223424512 [ 116.857652] ndblk2.0s: detected capacity change from 0 to 223424512 [ 116.890435] ndblk2.0s: detected capacity change from 0 to 223424512 [ 116.925862] ndblk2.0s: detected capacity change from 0 to 27928064 [ 116.967171] ndblk2.0s: detected capacity change from 0 to 27928064 [ 117.000647] ndblk2.0: detected capacity change from 0 to 28311552 [ 117.026754] ndblk2.0: detected capacity change from 0 to 28311552 [ 117.056780] ndblk2.0: detected capacity change from 0 to 28311552 [ 117.091005] nd_blk btt3.0: No existing arenas [ 117.094760] ndblk3.0s: detected capacity change from 0 to 27928064 [ 117.129367] ndblk3.0s: detected capacity change from 0 to 27928064 [ 117.165070] ndblk3.0s: detected capacity change from 0 to 27928064 [ 117.200090] ndblk3.0s: detected capacity change from 0 to 223424512 [ 117.235165] ndblk3.0s: detected capacity change from 0 to 223424512 [ 117.274015] ndblk3.0s: detected capacity change from 0 to 223424512 [ 117.316141] ndblk3.0s: detected capacity change from 0 to 223424512 [ 117.350107] ndblk3.0s: detected capacity change from 0 to 27928064 [ 117.380054] ndblk3.0s: detected capacity change from 0 to 27928064 [ 117.414741] ndblk3.0: detected capacity change from 0 to 28311552 [ 117.442741] ndblk3.0: detected capacity change from 0 to 28311552 [ 117.471744] ndblk3.0: detected capacity change from 0 to 28311552 [ 117.529686] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.535374] pmem6: detected capacity change from 0 to 33554432 [ 117.541192] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.543681] pmem6: detected capacity change from 33554432 to 0 [ 117.569779] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.573036] pmem6: detected capacity change from 0 to 33554432 [ 117.604734] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.607796] pmem6: detected capacity change from 0 to 33554432 [ 117.613821] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.616799] pmem6: detected capacity change from 33554432 to 0 [ 117.641595] nd_pmem namespace6.0: region6 read-only, marking pmem6 read-only [ 117.644598] pmem6: detected capacity change from 0 to 33554432 [ 117.719438] list_del corruption. next->prev should be ffff88041cac41e0, but was 65745f7469666e3a [ 117.722832] ------------[ cut here ]------------ [ 117.724477] WARNING: CPU: 4 PID: 2233 at lib/list_debug.c:56 __list_del_entry_valid+0x6c/0xa0 [ 117.727507] Modules linked in: dax_pmem(O) device_dax(O) nd_pmem(O) nd_blk(O) nd_btt(O) nfit_test(O-) nfit(O) libnvdimm(O) nfit_test_iomap(O) rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache sunrpc ppdev parport_pc pcspkr i2c_piix4 parport floppy i2c_core virtio_net virtio_balloon acpi_cpufreq sch_fq_codel ip_tables xfs libcrc32c sr_mod cdrom ata_generic pata_acpi virtio_console virtio_blk ata_piix libata virtio_pci crc32c_intel virtio_ring serio_raw virtio [ 117.741905] CPU: 4 PID: 2233 Comm: lt-libndctl Tainted: G O 4.12.0-rc1+ #12 [ 117.744461] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 117.746310] task: ffff88041d685500 task.stack: ffffc90002b50000 [ 117.748198] RIP: 0010:__list_del_entry_valid+0x6c/0xa0 [ 117.751084] RSP: 0018:ffffc90002b53d60 EFLAGS: 00010046 [ 117.753142] RAX: 0000000000000054 RBX: ffffc9001700e000 RCX: 0000000000000000 [ 117.755955] RDX: 0000000000000000 RSI: ffff88043310e0a8 RDI: ffff88043310e0a8 [ 117.758745] RBP: ffffc90002b53d60 R08: 00000000fffffffe R09: 0000000000000382 [ 117.760801] R10: 0000000000000005 R11: 0000000000000381 R12: ffffc90002b53d98 [ 117.762949] R13: ffffc9001700e000 R14: 0000000000000000 R15: ffff88041beefc08 [ 117.765000] FS: 00007f7d70082c80(0000) GS:ffff880433100000(0000) knlGS:0000000000000000 [ 117.767300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 117.768962] CR2: 000055c0db522cc0 CR3: 0000000422156000 CR4: 00000000000006e0 [ 117.770975] Call Trace: [ 117.771716] release_nodes+0x76/0x260 [ 117.772797] devres_release_all+0x3c/0x50 [ 117.773981] device_release_driver_internal+0x159/0x200 [ 117.775494] device_release_driver+0x12/0x20 [ 117.776763] bus_remove_device+0xfd/0x170 [ 117.777924] device_del+0x1e8/0x330 [ 117.778943] platform_device_del+0x28/0x90 [ 117.780129] platform_device_unregister+0x12/0x30 [ 117.781483] nfit_test_exit+0x2a/0x93b [nfit_test] [ 117.782858] SyS_delete_module+0x171/0x250 [ 117.784044] entry_SYSCALL_64_fastpath+0x1a/0xa5 [ 117.785346] RIP: 0033:0x7f7d6f399487 [ 117.786377] RSP: 002b:00007ffc604502a8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 117.788503] RAX: ffffffffffffffda RBX: 0000000002000000 RCX: 00007f7d6f399487 [ 117.790525] RDX: 00000000000000e8 RSI: 0000000000000800 RDI: 00000000020838f8 [ 117.792635] RBP: 00007ffc6044fc60 R08: 000000000208fb00 R09: 0000000000000037 [ 117.794641] R10: 000000000000006d R11: 0000000000000206 R12: 0000000000404e60 [ 117.796656] R13: 00007ffc60450440 R14: 0000000000000000 R15: 0000000000000000 [ 117.798699] Code: 48 89 c2 48 89 fe 31 c0 48 c7 c7 38 3f a7 81 e8 1e 34 e0 ff 0f ff 31 c0 5d c3 48 89 fe 31 c0 48 c7 c7 e8 3f a7 81 e8 07 34 e0 ff <0f> ff 31 c0 5d c3 48 89 fe 31 c0 48 c7 c7 a8 3f a7 81 e8 f0 33 [ 117.803715] ---[ end trace 06a87dde16f89e24 ]--- [ 117.804948] general protection fault: 0000 [#1] SMP [ 117.806233] Modules linked in: dax_pmem(O) device_dax(O) nd_pmem(O) nd_blk(O) nd_btt(O) nfit_test(O-) nfit(O) libnvdimm(O) nfit_test_iomap(O) rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache sunrpc ppdev parport_pc pcspkr i2c_piix4 parport floppy i2c_core virtio_net virtio_balloon acpi_cpufreq sch_fq_codel ip_tables xfs libcrc32c sr_mod cdrom ata_generic pata_acpi virtio_console virtio_blk ata_piix libata virtio_pci crc32c_intel virtio_ring serio_raw virtio [ 117.818454] CPU: 4 PID: 2233 Comm: lt-libndctl Tainted: G W O 4.12.0-rc1+ #12 [ 117.820866] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 117.822487] task: ffff88041d685500 task.stack: ffffc90002b50000 [ 117.824178] RIP: 0010:__list_del_entry_valid+0x29/0xa0 [ 117.825647] RSP: 0018:ffffc90002b53d60 EFLAGS: 00010887 [ 117.827130] RAX: 6d726f6674616c70 RBX: 6d726f6674616c70 RCX: dead000000000200 [ 117.829142] RDX: 65745f7469666e3a RSI: ffffc90002b53d98 RDI: ffffc9001700e000 [ 117.831266] RBP: ffffc90002b53d60 R08: 00000000fffffffe R09: ffffc9001700e000 [ 117.833276] R10: 0000000000000005 R11: ffff88041cac41c0 R12: ffffc90002b53d98 [ 117.835285] R13: 6d726f6674616c70 R14: 0000000000000000 R15: ffff88041beefc08 [ 117.837285] FS: 00007f7d70082c80(0000) GS:ffff880433100000(0000) knlGS:0000000000000000 [ 117.839579] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 117.841230] CR2: 000055c0db522cc0 CR3: 0000000422156000 CR4: 00000000000006e0 [ 117.843262] Call Trace: [ 117.843985] release_nodes+0x76/0x260 [ 117.845062] devres_release_all+0x3c/0x50 [ 117.846225] device_release_driver_internal+0x159/0x200 [ 117.847748] device_release_driver+0x12/0x20 [ 117.849029] bus_remove_device+0xfd/0x170 [ 117.850192] device_del+0x1e8/0x330 [ 117.851284] platform_device_del+0x28/0x90 [ 117.852485] platform_device_unregister+0x12/0x30 [ 117.853846] nfit_test_exit+0x2a/0x93b [nfit_test] [ 117.855219] SyS_delete_module+0x171/0x250 [ 117.856403] entry_SYSCALL_64_fastpath+0x1a/0xa5 [ 117.857769] RIP: 0033:0x7f7d6f399487 [ 117.858809] RSP: 002b:00007ffc604502a8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 [ 117.860877] RAX: ffffffffffffffda RBX: 0000000002000000 RCX: 00007f7d6f399487 [ 117.862752] RDX: 00000000000000e8 RSI: 0000000000000800 RDI: 00000000020838f8 [ 117.864645] RBP: 00007ffc6044fc60 R08: 000000000208fb00 R09: 0000000000000037 [ 117.866495] R10: 000000000000006d R11: 0000000000000206 R12: 0000000000404e60 [ 117.868359] R13: 00007ffc60450440 R14: 0000000000000000 R15: 0000000000000000 [ 117.870242] Code: 00 00 55 48 8b 07 48 b9 00 01 00 00 00 00 ad de 48 8b 57 08 48 89 e5 48 39 c8 74 27 48 b9 00 02 00 00 00 00 ad de 48 39 ca 74 60 <48> 8b 12 48 39 d7 75 41 48 8b 50 08 48 39 d7 75 21 b8 01 00 00 [ 117.875198] RIP: __list_del_entry_valid+0x29/0xa0 RSP: ffffc90002b53d60 ---- Yasunori Goto _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm(a)lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm

> Hmmm, though I made Fedora 25 environment, this panic still occurs... > I'll attach syslog and .config again. > > [..] > [ 117.804948] general protection fault: 0000 [#1] SMP [..] > [ 117.820866] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [..] > [ 117.843262] Call Trace: > [ 117.843985] release_nodes+0x76/0x260 > [ 117.845062] devres_release_all+0x3c/0x50 > [ 117.846225] device_release_driver_internal+0x159/0x200 > [ 117.847748] device_release_driver+0x12/0x20 > [ 117.849029] bus_remove_device+0xfd/0x170 > [ 117.850192] device_del+0x1e8/0x330 > [ 117.851284] platform_device_del+0x28/0x90 > [ 117.852485] platform_device_unregister+0x12/0x30 > [ 117.853846] nfit_test_exit+0x2a/0x93b [nfit_test] > [ 117.855219] SyS_delete_module+0x171/0x250 > [ 117.856403] entry_SYSCALL_64_fastpath+0x1a/0xa5 Can you also attach the qemu-kvm command line you are using? ps aux | grep qemu

Hi, Dan-san, Linda-san, I had chased the root cause of this panic problem, and maybe I found it. > > > Hmmm, though I made Fedora 25 environment, this panic still occurs... > > > I'll attach syslog and .config again. > > > > > > > > [..] > > > [ 117.804948] general protection fault: 0000 [#1] SMP > > [..] > > > [ 117.820866] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 > > [..] > > > [ 117.843262] Call Trace: > > > [ 117.843985] release_nodes+0x76/0x260 > > > [ 117.845062] devres_release_all+0x3c/0x50 > > > [ 117.846225] device_release_driver_internal+0x159/0x200 > > > [ 117.847748] device_release_driver+0x12/0x20 > > > [ 117.849029] bus_remove_device+0xfd/0x170 > > > [ 117.850192] device_del+0x1e8/0x330 > > > [ 117.851284] platform_device_del+0x28/0x90 > > > [ 117.852485] platform_device_unregister+0x12/0x30 > > > [ 117.853846] nfit_test_exit+0x2a/0x93b [nfit_test] > > > [ 117.855219] SyS_delete_module+0x171/0x250 > > > [ 117.856403] entry_SYSCALL_64_fastpath+0x1a/0xa5 > > > > Can you also attach the qemu-kvm command line you are using? > > > > ps aux | grep qemu The cause of this problem is the num_pm of nfit_test1 is wrong. Though 1 is specified for num_pm at nfit_test_init(), it must be 2. ---- static __init int nfit_test_init(void) { int rc, i; : : case 1: nfit_test->num_pm = 1; <---- !!! nfit_test->dcr_idx = NUM_DCR; ----- The num_pm affects size of devm_kcalloc() at nfit_test_probe(). ---- static int nfit_test_probe(struct platform_device *pdev) { if (nfit_test->num_pm) { int num = nfit_test->num_pm; <----!!! nfit_test->spa_set = devm_kcalloc(dev, num, sizeof(void *), GFP_KERNEL); <---!!!! nfit_test->spa_set_dma = devm_kcalloc(dev, num, sizeof(dma_addr_t), GFP_KERNEL); ----- However, spa_set[] array needs 2 elements at nfit_test1_alloc(). --- static int nfit_test1_alloc(struct nfit_test *t) { : t->spa_set[0] = test_alloc(t, SPA2_SIZE, &t->spa_set_dma[0]); <--- first element if (!t->spa_set[0]) return -ENOMEM; : t->spa_set[1] = test_alloc(t, SPA_VCD_SIZE, &t->spa_set_dma[1]); <---- The second element!!!! ----- This breaks other area, and the area is often the link list of devres. As a result, the panic occured on release_nodes(). I confirmed that this panic never occurred with the following patch.

> > Care to resend this as a formal patch with a "Signed-off-by:"? I'll > get it applied. Ok! ----- Fix the panic when nfit_test.ko is used. The root cause of panic is the num_pm of nfit_test1 is wrong. Though 1 is specified for num_pm at nfit_test_init(), it must be 2, because nfit_test1->spa_set[] array has 2 elements. Since the array is smaller than expected, the driver breaks other area. (it is often the link list of devres). As a result, panic occurs like the following example. --- 117.741905] CPU: 4 PID: 2233 Comm: lt-libndctl Tainted: G O 4.12.0-rc1+ #12 [ 117.744461] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 [ 117.746310] task: ffff88041d685500 task.stack: ffffc90002b50000 [ 117.748198] RIP: 0010:__list_del_entry_valid+0x6c/0xa0 [ 117.751084] RSP: 0018:ffffc90002b53d60 EFLAGS: 00010046 [ 117.753142] RAX: 0000000000000054 RBX: ffffc9001700e000 RCX: 0000000000000000 [ 117.755955] RDX: 0000000000000000 RSI: ffff88043310e0a8 RDI: ffff88043310e0a8 [ 117.758745] RBP: ffffc90002b53d60 R08: 00000000fffffffe R09: 0000000000000382 [ 117.760801] R10: 0000000000000005 R11: 0000000000000381 R12: ffffc90002b53d98 [ 117.762949] R13: ffffc9001700e000 R14: 0000000000000000 R15: ffff88041beefc08 [ 117.765000] FS: 00007f7d70082c80(0000) GS:ffff880433100000(0000) knlGS:0000000000000000 [ 117.767300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 117.768962] CR2: 000055c0db522cc0 CR3: 0000000422156000 CR4: 00000000000006e0 [ 117.770975] Call Trace: [ 117.771716] release_nodes+0x76/0x260 [ 117.772797] devres_release_all+0x3c/0x50 [ 117.773981] device_release_driver_internal+0x159/0x200 [ 117.775494] device_release_driver+0x12/0x20 [ 117.776763] bus_remove_device+0xfd/0x170 [ 117.777924] device_del+0x1e8/0x330 [ 117.778943] platform_device_del+0x28/0x90 [ 117.780129] platform_device_unregister+0x12/0x30 [ 117.781483] nfit_test_exit+0x2a/0x93b [nfit_test] [ 117.782858] SyS_delete_module+0x171/0x250 [ 117.784044] entry_SYSCALL_64_fastpath+0x1a/0xa5 ---