On Tue, Jun 07, 2011 at 10:49:51AM +0100, Tixy wrote: > On Tue, 2011-06-07 at 10:01 +0100, Andy Green wrote: > > On 06/07/2011 09:35 AM, Somebody in the thread at some point said: > > > > >>> Disabling Thumb2 fixes the problem. > > >> > > >> What did you actually disable? Presumably not CONFIG_THUMB2_KERNEL so > > >> the thumb support at all? > > > > > > I deselected CONFIG_THUMB2_KERNEL using menuconfig, which changed > > > the .config file like... > > > > > > -CONFIG_THUMB2_KERNEL=y > > > > Yeah but where did this config come from? > > It was the output produced by running the commands listed at > https://wiki.linaro.org/Resources/HowTo/KernelDeploy#From_Linaro_sources > > This config has CONFIG_THUMB2_KERNEL=y and doesn't have an entry for > CONFIG_CPU_V6 > > > Regenerating > > omap2plus_defconfig as I showed doesn't allow CONFIG_THUMB2_KERNEL to be > > configured because CONFIG_CPU_V6 is set (along with V7) since > > omap2plus_defconfig has a bunch of different cores supported. > > > > You mentioned --> > > > > "The .config I'm using is that described on the wiki at > > https://wiki.linaro.org/Resources/HowTo/KernelDeploy#From_Linaro_sources"; > > > > it also recommends > > > > make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- omap2plus_defconfig > > When I run that command I end up with a .config which has > CONFIG_CPU_V6=y and no entry for CONFIG_THUMB2_KERNEL. > > > I just confirmed that's the case with current linux-linaro-2.6.39. Am I > > going nuts :?) > > No, were using two different methods to produce configs. The one I use > produces a Thumb2 kernel, the one you use doesn't.
Well, it seems we have a few different problems here: Certainly, it looks like there is some kernel bug related to Thumb-2. Andy's "SIGILL" symptom is probably something else though. Finally, we're not all using the same configuration, which is causing confusion. There are at least two sources for the config: * The debian.linaro/config/...config.* files from the packaged linaro kernel tree (at least me, Tixy and the packaged kernel use this) * omap2plus_defconfig (omap upstream and some other people use this) I'm not sure if there's a correct answer to that one ... but we should be careful to explain more carefully what config we're using when discussing kernel problems (I'm guilty of being a bit vague on this...) Does anyone have a strong view on which config we should be using? Cheers ---Dave _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
