mnist caffe train with greantea an clblast

`I0811 17:23:27.085489 11147 layer_factory.hpp:78] Creating layer mnist
I0811 17:23:27.088057 11147 net.cpp:101] Creating Layer mnist
I0811 17:23:27.088192 11147 net.cpp:431] mnist -> data
I0811 17:23:27.088428 11147 net.cpp:431] mnist -> label
I0811 17:23:27.088680 11154 db_lmdb.cpp:35] Opened lmdb examples/mnist/mnist_train_lmdb
I0811 17:23:27.089092 11147 data_layer.cpp:41] output data size: 64,1,28,28
F0811 17:23:27.091882 11147 syncedmem.cpp:263] Check failed: mapped_ptr == cpu_ptr_ (0x65f06000 vs. 0x10b2000) Device claims it support zero copy but failed to create correct user ptr buffer
*** Check failure stack trace: ***
    @ 0x76b5bc24  (unknown)
    @ 0x76b5dcfc  (unknown)
    @ 0x76b5b814  (unknown)
    @ 0x76b5e648  (unknown)
    @ 0x76e38e38  caffe::SyncedMemory::mutable_gpu_data()
    @ 0x76dda800  caffe::Blob<>::mutable_gpu_data()
    @ 0x76dd7f08  caffe::BasePrefetchingDataLayer<>::LayerSetUp()
    @ 0x76e681f8  caffe::Net<>::Init()
    @ 0x76e68d60  caffe::Net<>::Net()
    @ 0x76dea96c  caffe::Solver<>::InitTrainNet()
    @ 0x76deaf00  caffe::Solver<>::Init()
    @ 0x76deb1c4  caffe::Solver<>::Solver()
    @ 0x76df4520  caffe::Creator_SGDSolver<>()
    @    0x1e1dc  caffe::SolverRegistry<>::CreateSolver()
    @    0x176f0  train()
    @    0x154e4  main
    @ 0x74d072fc  __libc_start_main
./examples/mnist/train_lenet.sh: line 3: 11147 Aborted                 ./build/tools/caffe train --solver=examples/mnist/lenet_solver.prototxt`

I'm faced with same problem and cosse was not enough memory (I had to add some additional debug info because of bad error handling)
you can take a look for details dividiti/ck-caffe#22