Messages in this thread | | | Date | Fri, 14 Sep 2007 10:34:40 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [GIT PATCH] USB autosuspend fixes for 2.6.23-rc6 |
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On Thu, 13 Sep 2007, Matthew Dharm wrote:
> > In fact, setting max_sectors down to 64 is probably overkill -- 120 > > ought to be enough. But there may have been one or two oddball devices > > that really did have a 32-KB limit, and better safe than sorry. At one > > point an engineer from Genesys said their devices did, although they do > > seem to work perfectly well with 64-KB transfers (and that's what > > Windows gives them). > > It's worth pointing out that performance drops like a stone as this number > goes down.
Does anybody have good performance figures, using a high-quality device? This is the sort of thing where it helps to have some real numbers.
Alan Stern
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