Date: Tue, 13 Jan 2015 07:49:36 -0700 From: Ian Lepore <ian@freebsd.org> To: kott <kmatpral@yahoo.com> Cc: freebsd-usb@freebsd.org Subject: Re: usb_pc_cpu_flush Message-ID: <1421160576.14601.175.camel@freebsd.org> In-Reply-To: <1421133295061-5980199.post@n5.nabble.com> References: <1419359192795-5975583.post@n5.nabble.com> <5499E734.1070507@selasky.org> <1419392511197-5975691.post@n5.nabble.com> <549A811D.3060204@selasky.org> <1419416870924-5975752.post@n5.nabble.com> <1419423740820-5975763.post@n5.nabble.com> <549AB711.8070005@selasky.org> <1419431704871-5975773.post@n5.nabble.com> <549BF430.8000207@selasky.org> <1419877515606-5976832.post@n5.nabble.com> <1421133295061-5980199.post@n5.nabble.com>
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On Tue, 2015-01-13 at 00:14 -0700, kott wrote: > Yes with cache disabled, this problem is not seen. Seems to be with a issue > with l2 cache. > Thanks kott Except that there are no known problems with l2 cache on armv7 right now. There are known problems with the USB driver using the busdma routines incorrectly, which accidentally works okay on x86 platforms but likely not so well on others. -- Ian
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