I did some tests with 2.6.16-rc5 on a number of platforms and here's a status report. Problems first. ;-) Generic: - The iomap patch is not in the mips-linux tree yet. Needs support for multiple PCI busses (as well for non-PCI busses?), see discussion at http://www.linux-mips.org/archives/linux-mips/2005-02/msg00023.html http://www.linux-mips.org/archives/linux-mips/2005-11/msg00124.html http://www.linux-mips.org/archives/linux-mips/2006-01/msg00172.html http://www.linux-mips.org/archives/linux-mips/2006-01/msg00232.html Cobalt: - >2 min delay probing for hard drives. The following patch still needs to be applied by Ralf: http://www.linux-mips.org/archives/linux-mips/2006-02/msg00218.html - The IDE/network interaction crash has been greatly improved by http://marc.theaimsgroup.com/?l=linux-netdev&m=114030066124134&w=2 but is not 100% gone. Nobody on netdev commented on the patch yet. - Possible corruption with USB (regression from 2.4) but I have not had a chance to reproduce this yet; possibly related to 64-bit. Will ask bug reporter to test with a 32-bit kernel. http://lists.debian.org/debian-mips/2006/02/msg00095.html Cobalt (64-bit): 64-bit has a number of problems. Peter Horton says "What surprises me is that all the problems appear to be timing related rather than 32/64 bit portability issues. Maybe this is 'cos the RM5231 has such small caches; doubling the size of all the kernel's pointers probably impacts us badly and slows everything down." - Tulip driver thinks MAC address on Qube 2700 is "ff:ff:ff:ff:ff:ff" - Tulip driver needs fix from Grant Grundler that has been nacked by Jeff Garzik. - PCI audio with ALSA doesn't work. In the past it failed with: http://www.linux-mips.org/archives/linux-mips/2006-01/msg00325.html now we get: http://www.linux-mips.org/archives/linux-mips/2006-02/msg00413.html SGI: - IP22 doesn't shutdown due to a oops in the serial driver. Patch at http://www.linux-mips.org/archives/linux-mips/2006-02/msg00391.html - IP22: Indigo2 with > 256 MB fails to boot (regression from 2.4; while 2.4 would only see 256 MB, it would at least boot) - IP22: VINO support is broken on 64-bit: http://www.linux-mips.org/archives/linux-mips/2006-02/msg00414.html - IP32: Apparently O2 with 384 MB RAM doesn't load, see http://lists.debian.org/debian-mips/2006/02/msg00031.html Kumba said IP32 works "only, it seems, on multiples like 64, 128, 256, and 512, based on issues we've seen gentoo-side" - IP32: FB doesn't work when you use > 4 MB RAM for it. Broadcom: - The duart driver for SWARM is not in mainline anymore; a regression from 2.4. - Apparently USB hid is broken (says p2); a regression from 2.4. - There are a number of time related problems; patches available: - gettimeofday jumps backwards then forwards (generic plus SB1250) http://www.linux-mips.org/archives/linux-mips/2005-07/msg00295.html - fix lost ticks on SB1250 http://www.linux-mips.org/archives/linux-mips/2006-01/msg00144.html - bcm1480 doubled process accounting times http://www.linux-mips.org/archives/linux-mips/2006-02/msg00404.html - Minor feature updates to the BCM1250/BCM1480 header files http://www.linux-mips.org/archives/linux-mips/2006-02/msg00217.html - bcm1x80: while 4 CPUs are found, Bogomips are never displayed. So maybe something with the recent SMP change is still not 100% right. [Actually, it seems this is not reported in non-SMP either] - bcm1x80: PCI DMA seems completely broken. What works: Cobalt (32-bit): - boots - loading an initrd works (needs CoLo 1.21) - PCI works: SCSI, USB, audio and network tested SGI IP22: - boots - loading of initrd image generated by tip22 works - HAL2 (sound) works, but driver should be converted to ALSA - VINO: supposedly works with a 32-bit kernel - fb: unknown SGI IP32: - boots - loading of initrd image generated by tip32 works - fb works (with 4 MB) Broadcom SWARM (1250): - boots - loading an initrd works - IDE works -- Martin Michlmayr http://www.cyrius.com/
