Messages in this thread | | | Date | Mon, 31 Aug 2015 09:40:43 -0700 | From | Guenter Roeck <> | Subject | Re: linux-next: Tree for Aug 31 (new arm, arm64, s390 failures) |
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Hi Marc,
On 08/31/2015 09:18 AM, Marc Zyngier wrote: > On Mon, 31 Aug 2015 08:47:07 -0700 > Guenter Roeck <linux@roeck-us.net> wrote: > >> Hi Marc, >> >> On 08/31/2015 08:31 AM, Marc Zyngier wrote: >>> On Mon, 31 Aug 2015 07:17:36 -0700 >>> Guenter Roeck <linux@roeck-us.net> wrote: >>> >>> Hi Guenter, >>> >>>> Qemu test results: >>>> total: 85 pass: 74 fail: 11 >>>> Failed tests: >>>> arm:vexpress-a9:arm_vexpress_defconfig:vexpress-v2p-ca9 >>>> arm:vexpress-a15:arm_vexpress_defconfig:vexpress-v2p-ca15-tc1 >>>> arm:vexpress-a9:multi_v7_defconfig:vexpress-v2p-ca9 >>>> arm:vexpress-a15:multi_v7_defconfig:vexpress-v2p-ca15-tc1 >>>> arm:realview-pb-a8:arm_realview_pb_defconfig >>>> arm:realview-eb:arm_realview_eb_defconfig >>>> mips:fuloong2e_defconfig >>>> xtensa:dc232b:lx60:xtensa_defconfig >>>> xtensa:dc232b:kc705:xtensa_defconfig >>>> xtensa:dc233c:ml605:generic_kc705_defconfig >>>> xtensa:dc233c:kc705:generic_kc705_defconfi >>>> >>>> Notable new failures (since next-20150828) are the s390 build failures, >>>> the arm64 build failure, and the arm qemu test failures. >>>> >>> >>> [...] >>> >>>> The qemu arm tests all fail silently, meaning there is no console >>>> output. Bisect points to 'irqchip/GIC: Convert to EOImode == 1'. >>>> Bisect log attached. >>> >>> Could you give me a qemu command-line I can use to track this down? >>> Real HW seems happy enough, from what I can see... >>> >> >> That is what I was most concerned about :-(. Unfortunately, it >> affects many of the most widely used arm qemu emulations, so it >> would be very desirable to get this fixed, either in the kernel >> or in qemu. >> >> See https://github.com/groeck/linux-build-test, specifically >> https://github.com/groeck/linux-build-test/tree/master/rootfs/arm/. >> run-qemu-arm.sh includes the various command lines and configurations. >> >> Note that some of the tests require a patched version of qemu. >> The tests failing above should all work with the latest published >> version of qemu (2.4), though. >> >> Please let me know if there is anything I can do to help tracking >> this down. > > I give it a quick go with qemu 2.1.2 as installed on my laptop, and the > results are interesting: > > - With -next as of today, qemu segfaults. Humpffff. > > - If I use my branch that contains the EOImode==1 patch, the system > boots normally. > > So there is an interaction between this patch and whatever is in -next > at the moment, but that patch on its own is not what triggers the issue. > Looks like it.
I did a couple of tests. - Revert 'irqchip/GIC: Don't deactivate interrupts forwarded to a guest'. Same problem. - Revert both 'irqchip/GIC: Don't deactivate interrupts forwarded to a guest' and 'irqchip/GIC: Convert to EOImode == 1'. Problem is no longer seen.
There are several other patches in drivers/irqchip/irq-gic.c since 4.2.
4c2880b31c70 irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance 567e5a014848 irqchip/gic: Only allow the primary GIC to set the CPU map 4b979e4c611c Merge branch 'linus' into irq/core 0d3f2c92e004 irqchip/gic: Remove redundant gic_set_irqchip_flags aec89ef72ba6 irqchip/gic: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND 5b29264c659c irqchip: Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc 4d83fcf8d615 irqchip/gic: Consolidate chained IRQ handler install/remove 41a83e06e2bb irqchip: Prepare for local stub header removal
Maybe there is an interaction between those and your patch ?
> I need to build a more recent version of qemu, but the above doesn't > fill be with confidence... > My patched version of qemu 2.4 doesn't crash for me, it simply hangs. Not that this is much better.
Thanks, Guenter
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