Hi Alan,
Unfortunately the options you suggested didn't help.
The patch below works and is tested with Ubuntu kernel 5.4.0.47.50.
I have stress tested the usb system. To the USB is now seven mechanical
hard disks and two ssd disks connected. Six processes are at the same
time writing random data to the disks. One of them is to the ssd disk I
couldn't write data to before without it failed. Also the other usb-ssd
disk is my root partition.
Before I applied the patch, my root partition sometimes failed to be
kept mounted. Now I have not had any crashes.
This is a quick fix for hard disks, but working. It continued to work
when I started three virtualbox guests and let them also do work. The
guests' hard disks is on my usb-root partition.
It doesn't work if I also use my usb2ethernet adapter (ID 2001:4a00
D-Link Corp.), although my root partition and two randomize tests
survived. Maybe a much larger timeout in this case will help? But this I
don't find as a good solution.
The behavior is the same on the other (much slower) computer with a
different usb hub. I have also tested it with exactly the same setup as
earlier, with no mechanical hard disks, and it works with the patch and
not without it.
Any suggestion on how to solve this? In a good way.
Best regards,
Patrik
---start of diff---
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 5b768b80d1ee..3c550934815c 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -105,7 +105,7 @@ MODULE_PARM_DESC(use_both_schemes,
DECLARE_RWSEM(ehci_cf_port_reset_rwsem);
EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem);
-#define HUB_DEBOUNCE_TIMEOUT 2000
+#define HUB_DEBOUNCE_TIMEOUT 10000
#define HUB_DEBOUNCE_STEP 25
#define HUB_DEBOUNCE_STABLE 100
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 20c555db4621..e64d441bb78f 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1841,8 +1841,8 @@ extern int usb_set_configuration(struct usb_device
*dev, int configuration);
* USB identifies 5 second timeouts, maybe more in a few cases, and a few
* slow devices (like some MGE Ellipse UPSes) actually push that limit.
*/
-#define USB_CTRL_GET_TIMEOUT 5000
-#define USB_CTRL_SET_TIMEOUT 5000
+#define USB_CTRL_GET_TIMEOUT 10000
+#define USB_CTRL_SET_TIMEOUT 10000
/**
---end of diff---
On 18/08/2020 20:34, Alan Stern wrote:
On Tue, Aug 18, 2020 at 08:22:55PM +0200, Patrik Nilsson wrote:
Hi Greg,
Thank you for debugging the issue!
Is there a way to set a speed limit to the device? I mean like setting the
usb-quirks. (i.e. usb-storage.quirks=174c:55aa:u)
Instead of buying a new enclosing for the drive... :(
You can try setting usb-storage.quirks=174c:55aa:g or :m. They will
slow down the data transfer rates. The :g flag is used by the uas
driver and the :m flag is used by usb-storage.
Alan Stern
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