Date: Fri, 7 Nov 2008 20:19:35 +0100 From: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-current@freebsd.org, freebsd-usb@freebsd.org Subject: Re: Kernel panic when copying data to umass device (USB4BSD) - problem found Message-ID: <20081107191935.GA51170@localhost.my.domain> In-Reply-To: <200811071811.27181.hselasky@c2i.net> References: <20081107082740.GA1334@icarus.home.lan> <200811071811.27181.hselasky@c2i.net>
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On Fri, Nov 07, 2008 at 06:11:26PM +0100, Hans Petter Selasky wrote: > > Hi Jeremy, > > I've reproduced the issue with some mods to the usb2_busdma.c on 32-bit > arcitecture and have made a fix for this problem. > > Try the following patch and re-test! > Thanks a lot! I have rebuild the kernel with this patch > > http://perforce.freebsd.org/chv.cgi?CH=152624 > and so far no panics. Indeed, the system I am using is amd64 with 4Gb of RAM. > Some mem-stick benchmarks would be nice ... > What exactly do you mean? I have done: dd if=file_on_one_stick of=/dev/null bs=1m (12.5 Mb/s) dd if=/dev/random of=file_on_the_stick bs=1m count=128 (2.6 Mb/s) and the same tests with USB-microSDHC adapter with 8Gb card (20 MB/s read, 15 Mb/s write). Anything else? Alexey.
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