ср, 12 сент. 2018 г. в 1:28, Dr. Bernd Feige <bernd.feige@xxxxxxxxxxxxxxxxxxxxx>: > > Hi Pavel, > > thanks for your response! > > > Could you provide the dmesg output when the issue appears? The > > instructions how to turn on debug logs can be found here: > > > > https://wiki.samba.org/index.php/LinuxCIFS_troubleshooting > > After "echo 7 > /proc/fs/cifs/cifsFYI", when the hang occurs, I get in > dmesg: > > [ 187.112213] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 187.155431] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 187.157380] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 188.071010] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 189.953596] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > > This time one directory listing (using the same notorious dir with > 67365 files) worked, the second try hung. > Although I did see "ls -l" hang as well, I seem to be much more > successful provoking the hang by using python3's os.listdir(). > > Starting a second os.listdir() on that directory (after several "ls" > and "ls -l" returned fine), the additional dmesg lines are the > following (and now processors spinning at 100% load on the two python > processes): > > [ 427.286617] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 427.287673] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 427.289656] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 428.126485] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 461.590599] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 462.316200] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 463.334653] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 464.086961] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 464.870562] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 465.613235] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 478.262724] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 478.999349] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 479.702844] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 480.461083] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 480.982617] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 481.716719] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 486.486589] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 487.253238] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 490.422517] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 491.183014] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 518.150858] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 518.903201] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 520.198853] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 520.941141] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 521.830787] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 522.592173] Status code returned 0x80000006 STATUS_NO_MORE_FILES > [ 584.154288] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > > And after another try "ls -al" now hangs and we have: > > [ 843.287238] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 843.288227] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.290266] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.296024] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.297751] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.307219] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.309061] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.315444] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.317053] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.321773] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.323557] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.329932] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.331642] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.341069] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.342778] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.348103] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.350018] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.356611] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.358367] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.364000] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.365836] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.370308] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.372040] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.380763] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.382480] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 843.384671] Status code returned 0xc0000010 STATUS_INVALID_DEVICE_REQUEST > [ 843.404123] Status code returned 0xc0000225 STATUS_NOT_FOUND > [ 844.289949] Status code returned 0xc0000257 STATUS_PATH_NOT_COVERED > [ 844.453141] Status code returned 0x80000006 STATUS_NO_MORE_FILES > > Here, one os.listdir() did finish (showing no errors in python or the > calling terminal), still 2 processors busy with one python and one ls > process... > > Best regards, > Bernd Hi Bernd, It seems that you didn't do: # echo 'module cifs +p' > /sys/kernel/debug/dynamic_debug/control # echo 'file fs/cifs/* +p' > /sys/kernel/debug/dynamic_debug/control which is essential to get debug logs.The logs you obtained show only error codes which is not very informative. Please repeat the repro with the debug logs enabled. -- Best regards, Pavel Shilovsky
