On 14.03.2013 22:33, Alan Stern wrote:
Maybe a better way to go about this is, instead of printing out every
allocation and deallocation, to keep a running counter. You could have
the driver print out the value of this counter every minute or so. Any
time the device isn't in use, the counter should be 0.
I implemented the counter. The max value is sampled at the beginning of
end_free_itds(), the current counter value is sampled at the end of this
function. Counter values w/o a max number are from the error path in
itd_urb_transaction().
The number of allocated iTDs can grow to higher values (why?), but
normally the iTDs are freed during normal operation. Due to some reason
the number of iTDs suddenly increases until coherent pool exhaustion.
There is no permanent memory leak, all iTDs are released when the user
application ends. But imho several thousands of iTDs cannot be the
intended behavior...
Soeren
Mar 16 01:12:52 guruvdr kernel: itd_counter:42 (max:174)
Mar 16 01:12:52 guruvdr kernel: itd_counter:0 (max:174)
Mar 16 01:13:13 guruvdr kernel: itd_counter:42 (max:174)
Mar 16 01:13:13 guruvdr kernel: itd_counter:0 (max:174)
Mar 16 01:13:34 guruvdr kernel: itd_counter:87 (max:174)
Mar 16 01:13:34 guruvdr kernel: itd_counter:0 (max:174)
Mar 16 01:13:55 guruvdr kernel: itd_counter:42 (max:426)
Mar 16 01:13:55 guruvdr kernel: itd_counter:0 (max:426)
Mar 16 01:15:14 guruvdr kernel: itd_counter:249 (max:1441)
Mar 16 01:15:14 guruvdr kernel: itd_counter:0 (max:1441)
[...]
Mar 16 02:03:33 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:04:15 guruvdr kernel: itd_counter:150 (max:1441)
Mar 16 02:04:15 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:04:36 guruvdr kernel: itd_counter:42 (max:1441)
Mar 16 02:04:36 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:04:57 guruvdr kernel: itd_counter:42 (max:1441)
Mar 16 02:04:57 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:05:18 guruvdr kernel: itd_counter:42 (max:1441)
Mar 16 02:05:18 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:05:39 guruvdr kernel: itd_counter:42 (max:1441)
Mar 16 02:05:39 guruvdr kernel: itd_counter:0 (max:1441)
Mar 16 02:06:43 guruvdr kernel: itd_counter:254 (max:1441)
Mar 16 02:07:44 guruvdr kernel: itd_counter:968 (max:1469)
Mar 16 02:08:04 guruvdr kernel: itd_counter:1192 (max:1469)
Mar 16 02:08:46 guruvdr kernel: itd_counter:1812 (max:1854)
Mar 16 02:09:07 guruvdr kernel: itd_counter:2117 (max:2159)
Mar 16 02:09:28 guruvdr kernel: itd_counter:2482 (max:2524)
Mar 16 02:09:49 guruvdr kernel: itd_counter:2791 (max:2833)
Mar 16 02:10:10 guruvdr kernel: itd_counter:3088 (max:3409)
Mar 16 02:10:31 guruvdr kernel: itd_counter:3402 (max:3444)
Mar 16 02:10:52 guruvdr kernel: itd_counter:3689 (max:3731)
Mar 16 02:11:13 guruvdr kernel: itd_counter:3950 (max:4073)
Mar 16 02:11:34 guruvdr kernel: itd_counter:4264 (max:4306)
Mar 16 02:11:55 guruvdr kernel: itd_counter:4525 (max:4567)
Mar 16 02:12:16 guruvdr kernel: itd_counter:4803 (max:4845)
Mar 16 02:12:37 guruvdr kernel: itd_counter:5028 (max:5070)
Mar 16 02:13:19 guruvdr kernel: itd_counter:5549 (max:5843)
Mar 16 02:13:40 guruvdr kernel: itd_counter:5836 (max:5878)
Mar 16 02:14:01 guruvdr kernel: itd_counter:6133 (max:6238)
Mar 16 02:14:06 guruvdr kernel: ERROR: 1024 KiB atomic DMA coherent pool
is too small!
Mar 16 02:14:06 guruvdr kernel: Please increase it with coherent_pool=
kernel parameter!
Mar 16 02:14:06 guruvdr kernel: itd_counter:6275
Mar 16 02:14:06 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:06 guruvdr kernel: itd_counter:6275
Mar 16 02:14:06 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:06 guruvdr kernel: itd_counter:6275
Mar 16 02:14:06 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:06 guruvdr kernel: itd_counter:6275
Mar 16 02:14:06 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:07 guruvdr kernel: itd_counter:6275
Mar 16 02:14:07 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:07 guruvdr kernel: itd_counter:6275
Mar 16 02:14:07 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:07 guruvdr kernel: itd_counter:6275
Mar 16 02:14:07 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:07 guruvdr kernel: itd_counter:6275
Mar 16 02:14:07 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:08 guruvdr kernel: itd_counter:6275
Mar 16 02:14:08 guruvdr kernel: orion-ehci orion-ehci.0: can't init itds
Mar 16 02:14:08 guruvdr kernel: itd_counter:78 (max:6275)
Mar 16 02:14:22 guruvdr kernel: itd_counter:0 (max:6275)
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
