On Mon, Nov 24, 2014 at 5:35 PM, Kevin Hilman <khilman@xxxxxxxxxx> wrote: > On Mon, Nov 24, 2014 at 4:25 PM, Olof Johansson <olof@xxxxxxxxx> wrote: >> On Mon, Nov 24, 2014 at 11:51 AM, Kevin Hilman <khilman@xxxxxxxxxx> wrote: >>> Kukjin, >>> >>> On Mon, Nov 10, 2014 at 11:35 AM, Kevin Hilman <khilman@xxxxxxxxxx> wrote: >>>> Kukjin Kim <kgene@xxxxxxxxxx> writes: >>>> >>>>> Kevin Hilman wrote: >>>>>> >>>>>> From: Kevin Hilman <khilman@xxxxxxxxxx> >>>>>> >>>>>> The option CONFIG_EXYNOS5420_MCPM is causing imprecise external aborts >>>>>> during boot testing, causing various userspace startup failures. >>>>>> >>>>>> Disable until it has gotten more testing. >>>>>> >>>>>> Cc: Kukjin Kim <kgene.kim@xxxxxxxxxxx>, >>>>>> Cc: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>, >>>>>> Cc: Sachin Kamat <sachin.kamat@xxxxxxxxxxx>, >>>>>> Cc: Doug Anderson <dianders@xxxxxxxxxxxx>, >>>>>> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>, >>>>>> Cc: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>, >>>>>> Cc: Tushar Behera <tushar.behera@xxxxxxxxxx>, >>>>>> Cc: stable@xxxxxxxxxxxxxxx # v3.17+ >>>>>> Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx> >>>>>> --- >>>>>> This has been reported by a few people[1], but not investigated or fixed, so it's >>>>>> time to disable this feature until it can be fixed. >>>>>> >>>>> Hi Kevin, >>>>> >>>>> Yeah I agree with your opinion. >>>>> >>>>> But as you can see my tree, I've queued regarding mcpm patches for 3.19 will >>>>> be shown in -next in this weekend. >>>> >>>> Which of the recently queued patches are expected to address the >>>> imprecise abort issue? I'd be happy to test them out. >>> >>> Exynos5 MCPM is still broken in linux-next and still causing an imprecise abort. >>> >>> What is the status of $SUBJECT patch? >>> >>>>> Anyway let me apply this into -fixes and >>>>> then let's enable after test its functionality in -next in a couple of days. >>>> >>>> Yes, I think this needs to be applied until these aborts are understood >>>> and fixed. >>> >>> Is anyone at Samsung actually looking into these MCPM issues? >> >> Hi Kevin, >> >> What hardware are you having problems with? 5420 or 5422/5800? > > Yes. :) > > exynos5420-arndale-octa: > http://storage.armcloud.us/kernel-ci/mainline/v3.18-rc6/arm-exynos_defconfig/boot-exynos5420-arndale-octa.html > exynos5422-odroid-xu3: > http://storage.armcloud.us/kernel-ci/mainline/v3.18-rc6/arm-exynos_defconfig/boot-exynos5422-odroid-xu3.html > > My boot tests seem to pass fine because I have such a minimal > userspace, but Tyler Baker reported that with a "real" userspace, he > can't boot to a shell: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/286203.html I'm not surprised that 5420 has issues, but I have not seen any external aborts on neither Chromebook that I have in my farm. Sounds like the secondary cpus should be disabled on those device trees instead, doesn't it? -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
 |