On Thu, Oct 02, 2014 at 04:59:30PM -0500, Felipe Balbi wrote: > Hi, > > On Thu, Oct 02, 2014 at 02:19:08PM -0700, Tony Lindgren wrote: > > * Felipe Balbi <balbi@xxxxxx> [141002 13:18]: > > > On Thu, Oct 02, 2014 at 12:52:38PM -0700, Tony Lindgren wrote: > > > > * Tony Lindgren <tony@xxxxxxxxxxx> [141002 09:36]: > > > > > * Tero Kristo <t-kristo@xxxxxx> [140924 02:04]: > > > > > > On 09/19/2014 08:27 PM, Paul Walmsley wrote: > > > > > > >On Fri, 19 Sep 2014, Paul Walmsley wrote: > > > > > > > > > > > > > >>However, I saw the following crash at boot on 37xxevm during one of > > > > > > >>the boot test. Ran thirty more boot tests afterwards on that board > > > > > > >>and it did not recur. It seems unlikely that the problem is related > > > > > > >>to this series, but looks like we may have some intermittent boot > > > > > > >>failure or race on 37xx :-( > > > > > > > > > > > > > >... > > > > > > > > > > > > > >>[ 4.892211] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa318034 > > > > > > >>[ 4.900299] Internal error: : 1028 [#1] SMP ARM > > > > > > >>[ 4.905090] Modules linked in: > > > > > > >>[ 4.908325] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.17.0-rc5-12866-g0164b2d #1 > > > > > > >>[ 4.916320] task: c0835db0 ti: c082a000 task.ti: c082a000 > > > > > > >>[ 4.922027] PC is at omap2_gp_timer_set_next_event+0x24/0x78 > > > > > > >>[ 4.928009] LR is at clockevents_program_event+0xc0/0x148 > > > > > > >>[ 4.933715] pc : [<c002622c>] lr : [<c00a2800>] psr: 00000193 > > > > > > >>[ 4.933715] sp : c082bed8 ip : 00000000 fp : 00000000 > > > > > > >>[ 4.945800] r10: 00000000 r9 : 24101100 r8 : c0839080 > > > > > > >>[ 4.951324] r7 : 00000001 r6 : 237bc339 r5 : 0000009f r4 : 3d9759e7 > > > > > > >>[ 4.958190] r3 : fa318034 r2 : c08cb920 r1 : 00000003 r0 : fffffec1 > > > > > > >>[ 4.965087] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel > > > > > > >>[ 4.972900] Control: 10c5387d Table: 80004019 DAC: 00000015 > > > > > > >>[ 4.978942] Process swapper/0 (pid: 0, stack limit = 0xc082a248) > > > > > > >>[ 4.985290] Stack: (0xc082bed8 to 0xc082c000) > > > > > > >>[ 4.989868] bec0: 237bc339 00000001 > > > > > > >>[ 4.998504] bee0: 00000001 24101100 00000001 cfc7d6c8 00000001 cfc7da50 cfc7d720 c00a4780 > > > > > > >>[ 5.007141] bf00: 00000000 c00962b0 cfc7d720 c0096180 00000001 00000000 00000001 c08256c8 > > > > > > >>[ 5.015777] bf20: c082a000 c08256c8 00000000 c00962b0 237b4c04 00000001 00000002 a0000193 > > > > > > >>[ 5.024414] bf40: 00989680 00000000 00000000 24101100 00000001 cfc7da50 00000000 c108cc78 > > > > > > >>[ 5.033020] bf60: 00000000 c00962b0 00000000 00000002 00000001 00000000 c108cc78 c00a56f0 > > > > > > >>[ 5.041656] bf80: 00000000 00000002 237b4c04 00000001 c08c8ce8 c082a000 00000000 c08c8ce8 > > > > > > >>[ 5.050292] bfa0: c08329dc c0832978 cfc7f0f8 c0072808 c0559928 c08270f0 c08caf40 c080fdc0 > > > > > > >>[ 5.058929] bfc0: 00000000 c07c3b74 ffffffff ffffffff c07c35f0 00000000 00000000 c080fdc0 > > > > > > >>[ 5.067535] bfe0: c08cb154 c0832968 c080fdbc c083763c 80004059 80008074 00000000 00000000 > > > > > > >>[ 5.076171] [<c002622c>] (omap2_gp_timer_set_next_event) from [<c00a2800>] (clockevents_program_event+0xc0/0x148) > > > > > > >>[ 5.087005] [<c00a2800>] (clockevents_program_event) from [<c00a4780>] (tick_program_event+0x44/0x54) > > > > > > >>[ 5.096771] [<c00a4780>] (tick_program_event) from [<c0096180>] (__hrtimer_start_range_ns+0x3c0/0x4a0) > > > > > > >>[ 5.106597] [<c0096180>] (__hrtimer_start_range_ns) from [<c00962b0>] (hrtimer_start_range_ns+0x24/0x2c) > > > > > > >>[ 5.116577] [<c00962b0>] (hrtimer_start_range_ns) from [<c00a56f0>] (tick_nohz_idle_exit+0x140/0x1ec) > > > > > > >>[ 5.126342] [<c00a56f0>] (tick_nohz_idle_exit) from [<c0072808>] (cpu_startup_entry+0xf4/0x2d0) > > > > > > >>[ 5.135528] [<c0072808>] (cpu_startup_entry) from [<c07c3b74>] (start_kernel+0x340/0x3a8) > > > > > > >>[ 5.144165] [<c07c3b74>] (start_kernel) from [<80008074>] (0x80008074) > > > > > > >>[ 5.151031] Code: 13a0c000 0a000004 ee07cfba e592301c (e5931000) > > > > > > >>[ 5.157470] ---[ end trace f92de024d996d904 ]--- > > > > > > >>[ 5.162353] Kernel panic - not syncing: Attempted to kill the idle task! > > > > > > >>[ 5.169433] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! > > > > > > > > > > > > > >Actually it just occurred to me that if something broke > > > > > > >*wait_target_ready(), we'd expect to see intermittent failures like this, > > > > > > >and this series touches *wait_target_ready(). So it might be worth taking > > > > > > >a look at that with a magnifying glass to make sure that it's working. > > > > > > > > > > > > I think this is probably something else, and most likely more hideous. The > > > > > > clock source timers are only enabled once during a boot, and they are never > > > > > > idled after that. This error happens almost 5 seconds after the initial > > > > > > module enable...? > > > > > > > > > > I have not seen this and I've had this branch merged in for testing > > > > > here for about a week now. I've also merged it into linux-omap master > > > > > branch for merging now, let's keep it there and plan on merging it early > > > > > for v3.19 merge window unless some issues are found. > > > > > > > > Hmm here seems to be a link to similar issues from 2011: > > > > > > > > http://e2e.ti.com/support/arm/sitara_arm/f/791/p/113593/628790.aspx > > > > > > > > Looks like the issue can be potentially reproduced with: > > > > > > > > # cyclictest -l100000000 -m -a0 -t1 -n -p99 -i200 -h200 -q > > > > > > running here on am335x and am437x. On that same post, on person > > > mentions he reproduced on beagle bone. > > > > OK I'll run it here too on my am37xx evm. Looks like Stanley was > > running both cyclictest and hackbench the same time. > > yeah I did that. > > BTW, just got the following on BBB, AM437x SK is still running. > > [ 3952.432262] Kernel panic - not syncing: Attempted to kill the idle task!752763 > [ 3952.442403] CPU: 0 PID: 0 Comm: hackbench Not tainted 3.17.0-rc6-00456-gd8da063 #222 > [ 3952.450517] [<c0017338>] (unwind_backtrace) from [<c0012fdc>] (show_stack+0x20/0x24) > [ 3952.458620] [<c0012fdc>] (show_stack) from [<c0647f0c>] (dump_stack+0x8c/0xa4) > [ 3952.466168] [<c0647f0c>] (dump_stack) from [<c0644da4>] (panic+0xa4/0x224) > [ 3952.473358] [<c0644da4>] (panic) from [<c004b510>] (do_exit+0x924/0x9d8) > [ 3952.480358] [<c004b510>] (do_exit) from [<c004c4d8>] (do_group_exit+0x50/0xc0) > [ 3952.487903] [<c004c4d8>] (do_group_exit) from [<c004c568>] (__wake_up_parent+0x0/0x30) > [ 3952.496179] [<c004c568>] (__wake_up_parent) from [<c000ed40>] (ret_fast_syscall+0x0/0x48) > [ 3952.504875] drm_kms_helper: panic occurred, switching back to text console > [ 3952.517844] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! > > > > And I'll also queue the following patch during the -rc cycle to > > avoid apps segfaulting occasionally at random on omap3. > > > > 8<------------------- > > From: Tony Lindgren <tony@xxxxxxxxxxx> > > Date: Thu, 2 Oct 2014 13:51:18 -0700 > > Subject: [PATCH] ARM: omap2plus_defconfig: Enable ARM erratum 430973 for omap3 > > > > Somehow we don't have this set in omap2plus_defconfig. Without this > > apps can segfault randomly on omap3. I can reproduce this easily > > on am37xx-evm by doing apt-get update over NFSroot. > > > > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> > > > > diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig > > index 02a9fbd..13189fe 100644 > > --- a/arch/arm/configs/omap2plus_defconfig > > +++ b/arch/arm/configs/omap2plus_defconfig > > @@ -52,6 +52,7 @@ CONFIG_SOC_AM43XX=y > > CONFIG_SOC_DRA7XX=y > > CONFIG_ARM_THUMBEE=y > > CONFIG_ARM_ERRATA_411920=y > > +CONFIG_ARM_ERRATA_430973=y > > and maybe this will fix BBB :-) I'll add that locally. If I survive > until tomorrow, I'll add a Tested-by. BBB died again with the same behavior as above, but I think it's unrelated to this errata. Therefore: Tested-by: Felipe Balbi <balbi@xxxxxx> cheers -- balbi
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