Messages in this thread | | | Date | Tue, 14 Oct 2008 13:05:39 +0200 | From | Nicolas Bareil <> | Subject | Re: USB problem on x86_64: nommu_map_single() issue? |
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On Tue, Oct 14, 2008 at 08:00:09PM +0900, FUJITA Tomonori wrote: > > > Is this a regression? Did it work on earlier kernels? > > > > Yes this is a regression: USB works in 2.6.26.x with (almost) the same configuration. > > With old kernels, you can find something like the following line in > the boot log? > > PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
Indeed, I have this line:
Oct 14 12:46:29 brew kernel: [ 0.004000] Calgary: detecting Calgary via BIOS EBDA area Oct 14 12:46:29 brew kernel: [ 0.004000] Calgary: Unable to locate Rio Grande table in EBDA - bailing! Oct 14 12:46:29 brew kernel: [ 0.004000] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) Oct 14 12:46:29 brew kernel: [ 0.004000] Placing software IO TLB between 0x4000000 - 0x8000000 Oct 14 12:46:29 brew kernel: [ 0.004000] Memory: 4055544k/4980736k available (2225k kernel code, 138092k reserved, 1079k data, 392k init) Oct 14 12:46:29 brew kernel: [ 0.004000] CPA: page pool initialized 1 of 1 pages preallocated
The full kern.log is available here: http://chdir.org/~nbareil/kern.log-2.6.26-1
Thanks!
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