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Re: USB disk speed regression WD Elements - with bisect result 22547c4cc4fe20698a6a85a55b8788859134b8e4

From Alan Stern <stern@rowland.harvard.edu>
Newsgroups linux.kernel
Subject Re: USB disk speed regression WD Elements - with bisect result 22547c4cc4fe20698a6a85a55b8788859134b8e4
Date 2017-07-25 19:10 +0200
Message-ID <u7bvk-5B8-9@gated-at.bofh.it> (permalink)
References <u79Dc-4o6-21@gated-at.bofh.it>
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On Tue, 25 Jul 2017, Zdenek Kabelac wrote:

> And in fact it's the very same commit - which adds this message
> (just check current 4.13 with and without this commit reverted)
> 
> So here goes usbmon trace (aka  'cat /sys/kernel/debug/usb/usbmon/0u')
> no other usb device has been touch so should not hopefully interfere here.
> 
> Trace is from 4.12 kernel - so it has reported  "not running at top speed"

Can you collect an equivalent trace under 4.8?

Alan Stern

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Re: USB disk speed regression WD Elements - with bisect result  22547c4cc4fe20698a6a85a55b8788859134b8e4 Alan Stern <stern@rowland.harvard.edu> - 2017-07-25 19:10 +0200

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