Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

2019-07-06 Thread Andrea Vai
On 03/07/19 14:36:05, Ming Lei wrote: > On Wed, Jul 03, 2019 at 07:11:17AM +0200, Andrea Vai wrote: > > On 03/07/19 10:01:23, Ming Lei wrote: > > > On Wed, Jul 03, 2019 at 12:39:31AM +0200, Andrea Vai wrote: > > > > On 02/07/19 20:01:13, Ming Lei wrote: > > > > > On Tue, Jul 02, 2019 at 12:46:45PM

Re: Slow I/O on USB media after commit f664a3cc17b7d0a2bc3b3ab96181e1029b0ec0e6

2019-07-06 Thread Andrea Vai
On 03/07/19 10:23:13, Alan Stern wrote: > > [...] > Andrea, another thing you could try is to collect a usbmon trace under > one of the "slow" kernels. Follow the instructions in > Documentation/usb/usbmon.txt. I think you could kill the file-copy > operation after just a couple of seconds; t