On 19/03/16 11:59, Michael Howard wrote: > On 19/03/2016 09:21, Gordan Bobic wrote: >> On 17/03/16 08:05, Michael Howard wrote: >>> On 17/03/2016 01:24, Gordan Bobic wrote: >>>> On 2016-03-14 22:14, Michael Howard wrote: >>>> >>>>> I didn't build an RPM as I came >>>>> across a packaging problem, an aarch64/UTS_MACHINE issue I believe and >>>>> I had no idea how to solve it nor could I spend any real time >>>>> investigating it. >>>> >>>> I have put together some kernel rpms: >>>> http://ftp.redsleeve.org/pub/misc/aarch64/ >>> Cool. Did you have any problems? make rpm-pkg failed for me at packaging >>> stage, with an error something like; >>> >>> |scripts/Makefile.fwinst:43: *** mixed implicit and static pattern >>> rules. >>> Stop. make[2]: *** [_modinst_post] Error 2| >> >> Speaking of the kernel, I seem to be having a problem. On the kernel >> above, if I modprobe different SATA/SAS drivers, I get an immediate >> kernel lock-up for which the only cure is the hard-reset (I can only >> complete the boot if blacklist the drivers with the PCIe SATA card >> installed). >> >> But here's the weird part - the CentOS 4.2.0 kernel doesn't have this >> problem. So I'm wondering if the CentOS kernel has patches that >> specifically address this, or whether this is an upstream bug, either >> a regression since 4.2.x or a bug that manifests when using 4KB memory >> pages. >> >> I have thus far reproduced this with a SIL3132 2-port SATA card and a >> 3ware 9650SE-16ML 16-port SAS card. I don't have any other SATA >> controllers handy to test with. >> >> Do you happen to have any SATA/SAS controllers you could try (or have >> tried) with your kernel on this board? > > I'll take a look later today, when I can get at some cards but I can > confirm similar results with a Perc H800 fitted (don't ask), Nothing _to_ ask - seems perfectly reasonable to me to have some big fat SAS cards in this machine. My own plans for this box include filling it up with a boatload of disks. :-) > the kernel panics on boot but doesn't with the original kernel. Is this with your 4.5.x kernel? I wonder if running with 4KB pages breaks some assumption about DMA alignment or something along those lines. Which would bring up an interesting question - whether picking 64KB pages in the CentOS kernel a fluke or a bodge... Gordan