Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6

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To: Linus Torvalds <torvalds@...>
Cc: Alan Stern <stern@...>, Adrian Bunk <bunk@...>, <linux-usb-devel@...>, Greg KH <gregkh@...>, <linux-kernel@...>, Adrian Bunk <bunk@...>, Andrew Morton <akpm@...>, Oliver Neukum <oneukum@...>, <zaitcev@...>
Date: Thursday, September 13, 2007 - 3:26 pm

On Thu, 13 Sep 2007 09:43:13 -0700 (PDT), Linus Torvalds <torvalds@linux-foundation.org> wrote:


Well, ub does that today. And there is a measurable performance differential
with usb-storage when driving rotating discs, or so I heard.


I'm afraid this is valuable. However, a number of devices only return
garbage as residue if the transfer length is greater than 32KB. Limiting
that would trim this blacklist, I think. The vast majority of devices
work correctly in this regard, and ub checks the residue without any
blacklist.


It has something to do with the way our partition detection works. Linux
tends to rely on the reported device size. Windows reads the first block
and then goes further based on its contents. If we exterminate partitioning
code which uses the reported device size for autodetection, then this
problem will fix itself.


This is being worked upon. The recent change for floppies eliminated
a big number of those.

-- Pete
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Messages in current thread:
[GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Greg KH, (Thu Sep 13, 9:33 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Thu Sep 13, 10:52 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Thu Sep 13, 11:20 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Thu Sep 13, 11:40 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Thu Sep 13, 12:07 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Thu Sep 13, 4:19 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Linus Torvalds, (Thu Sep 13, 4:44 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Thu Sep 13, 5:28 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Fri Sep 14, 10:26 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Thu Sep 13, 6:05 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Fri Sep 14, 10:29 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Linus Torvalds, (Thu Sep 13, 8:11 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Adrian Bunk, (Fri Sep 14, 10:15 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Thu Sep 13, 4:31 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Linus Torvalds, (Thu Sep 13, 12:43 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Pete Zaitcev, (Thu Sep 13, 3:26 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Thu Sep 13, 3:13 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Jiri Kosina, (Fri Sep 14, 4:55 am)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Matthew Dharm, (Thu Sep 13, 8:24 pm)
Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6, Alan Stern, (Fri Sep 14, 10:34 am)