On Tue, Aug 20, 2019 at 06:37:22PM +0200, Piergiorgio Sartor wrote:

On Tue, Aug 20, 2019 at 09:23:26AM +0200, Christoph Hellwig wrote:

quoted

On Mon, Aug 19, 2019 at 10:14:25AM -0400, Alan Stern wrote:

quoted

Let's bring this to the attention of some more people.

It looks like the bug that was supposed to be fixed by commit
d74ffae8b8dd ("usb-storage: Add a limitation for
blk_queue_max_hw_sectors()"), which is part of 5.2.5, but apparently
the bug still occurs.

Piergiorgio,

can you dump the content of max_hw_sectors_kb file for your USB storage
device and send that to this thread?

Hi all,

for both kernels, 5.1.20 (working) and 5.2.8 (not working),
the content of /sys/dev/x:y/queue/max_hw_sectors_kb is 512
for USB storage devices (2.0 and 3.0).

This is for the PC showing the issue.

In an other PC, which does not show the issus at the moment,
the values are 120, for USB2.0, and 256, for USB3.0.

Hi again,

any news on this?

Is there anything I can do to help?

Should I report this somewhere else too?

Currently this is quite a huge problem for me,
since the only working external storage is an
old 1394 HDD...

Thanks,

bye,

-- 

piergiorgio