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

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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