FUJITA Tomonori wrote: > On Fri, 12 Mar 2010 20:12:40 +0100 > Albert Herranz <albert_herranz@xxxxxxxx> wrote: > >> The current SWIOTLB code uses a default of 64MB for the IO TLB area. >> This size can be influenced using a kernel command line parameter "swiotlb". >> Unfortunately, the parsing of the kernel command line is done _after_ the >> swiotlb is initialized on some architectures. >> >> This patch adds a new function swiotlb_set_default_size() which can be used >> before swiotlb_init() to indicate the desired IO TLB area size in bytes. >> >> This will be used later to implement a smaller IO TLB on the Nintendo Wii >> video game console which just comes with 24MB + 64MB of RAM. >> >> CC: linuxppc-dev@xxxxxxxxxxxxxxxx >> CC: linux-kernel@xxxxxxxxxxxxxxx >> CC: x86@xxxxxxxxxx >> CC: linux-ia64@xxxxxxxxxxxxxxx >> Signed-off-by: Albert Herranz <albert_herranz@xxxxxxxx> >> --- >> include/linux/swiotlb.h | 2 ++ >> lib/swiotlb.c | 20 ++++++++++++++++++++ >> 2 files changed, 22 insertions(+), 0 deletions(-) > > Please fix the powerpc swiotlb initialization instead. > > Calling swiotlb_init() before parsing kernel parameters sounds > wrong. Any reasons why you can't fix it? > I think that this would be better asked by a PowerPC maintainer. Ben? If this is really a problem the swiotlb late init may be a solution too in this particular case. Thanks, Albert -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
