On Mon 2017-10-02 14:06:03, Linus Walleij wrote: > On Mon, Oct 2, 2017 at 10:41 AM, Pavel Machek <pavel@xxxxxx> wrote: > > >> Bounce buffers are being removed from v4.15 > > As Adrian states, this would make any last bugs go away. I would > even consider putting this patch this into fixes if it solves the problem. > > > although you may experience > >> performance regression with that: > >> > >> https://marc.info/?l=linux-mmc&m=150589778700551 > > > > Hmm. The performance of this is already pretty bad, I really hope it > > does not get any worse. > > Did you use bounce buffers? Those were improving performance on > some laptops with TI or Ricoh host controllers and nothing else was > ever really using it (as can be seen from the commit). Thinkpad X220... how do I tell if I was using them? I believe so, because I uncovered bug in them before. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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