From: William Cohen <wcohen@redhat.com>
To: systemtap@sourceware.org, Dave Long <dave.long@linaro.org>,
Pratyush Anand <panand@redhat.com>,
Mark Brown <broonie@linaro.org>
Subject: Re: exercising current aarch64 kprobe support with systemtap
Date: Mon, 13 Jun 2016 16:15:00 -0000 [thread overview]
Message-ID: <7f507ccb-28ae-83f2-d5c1-4f286b3cf452@redhat.com> (raw)
In-Reply-To: <73cc2f02-691c-4f96-433f-4d3d0def8b50@redhat.com>
On 06/13/2016 12:10 PM, William Cohen wrote:
> I dummied up the hw_addr_*.stp tests to not run. The test made it further, but then got stuck spewing out:
>
> [ 1648.037580] Unexpected kernel single-step exception at EL1
> [ 1648.043060] Unexpected kernel single-step exception at EL1
> [ 1648.048540] Unexpected kernel single-step exception at EL1
I was able to get the start of when it starting spewning the single-step exception at EL1:
[root@amd-seattle-03 systemtap]# [ 793.930801] Scheduler tracepoints stat_sleep, stat_iowait, stat_blocked and stat_runtime require the kernel parameter schedstats=enabled or kernel.sched_schedstats=1
[ 793.965896] hrtimer: interrupt took 422795 ns
[ 887.063206] ------------[ cut here ]------------
[ 887.067856] WARNING: CPU: 1 PID: 21315 at mm/page_counter.c:26 page_counter_cancel+0x5c/0x68
[ 887.076288] Modules linked in: stap_e307cc4760ef17e67f4e7cdd288c9472_1_21004(OE) vfat fat amd_xgbe i2c_designware_platform ipmi_si ptp i2c_designware_core i2c_core spi_pl022 sbsa_gwdt ccp ipmi_msghandler pps_core crc32_arm64 ghash_ce nfsd auth_rpcgss nfs_acl lockd grace sunrpc xfs libcrc32c [last unloaded: stap_d8856f77dba73cfbeacac8b8ae0b9f60__20838]
[ 887.107716]
[ 887.109202] CPU: 1 PID: 21315 Comm: echo Tainted: G W IOE 4.7.0-rc1panand+ #5
[ 887.117123] Hardware name: AMD Overdrive/Supercharger/Default string, BIOS ROD1001A 02/09/2016
[ 887.125738] Unexpected kernel single-step exception at EL1
[ 887.131241] Unexpected kernel single-step exception at EL1
-Will
>
>
> This happens during the "systemtap.onthefly/kprobes_onthefly.exp" tests and can be reliably triggered running that portion of the systemtap tests with:
>
> make installcheck RUNTESTFLAGS="--debug systemtap.onthefly/kprobes_onthefly.exp"
>
>
> Seems like the tests get past the following and then start spewing the error message:
>
> Executing: kill -KILL 22311
> kill: kill: sending signal to 22311 failed: No such process
> PASS: kprobes_onthefly - otf_stress_hard_iter_2000 (survived)
>
> However the testsuite doesn't seem to make it through to print out the next test:
>
> PASS: hrtimer_onthefly - otf_stress_max_iter_5000 (survived)
>
> Note that this kernel (clone of https://github.com/pratyushanand/linux on test_upstream_arm64_devel branch) does have the patch to avoid having the atomic region search go before the start of a function by look for the "stp x29, x30, [sp, -#xx]!"
>
> -Will
>
next prev parent reply other threads:[~2016-06-13 16:15 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-09 16:17 William Cohen
2016-06-09 19:52 ` William Cohen
2016-06-10 3:42 ` David Long
2016-06-10 5:49 ` David Long
2016-06-10 13:43 ` Pratyush Anand
2016-06-10 14:03 ` William Cohen
2016-06-10 14:37 ` David Long
2016-06-10 15:27 ` William Cohen
2016-06-10 14:20 ` David Long
2016-06-10 15:11 ` William Cohen
2016-06-10 17:07 ` Pratyush Anand
2016-07-12 14:33 ` William Cohen
2016-07-13 18:26 ` David Long
2016-07-13 18:47 ` Pratyush Anand
2016-07-13 19:45 ` William Cohen
2016-06-10 21:28 ` William Cohen
2016-06-10 21:37 ` William Cohen
2016-06-13 4:28 ` Pratyush Anand
2016-06-13 13:42 ` William Cohen
2016-06-22 20:24 ` William Cohen
2016-06-23 3:19 ` David Long
2016-06-23 13:42 ` William Cohen
2016-06-23 13:47 ` David Smith
2016-06-23 15:49 ` William Cohen
2016-06-23 18:26 ` David Long
2016-06-23 19:22 ` William Cohen
2016-06-27 2:57 ` David Long
2016-06-27 14:18 ` Pratyush Anand
2016-06-28 3:20 ` William Cohen
2016-07-04 12:46 ` Pratyush Anand
2016-07-07 19:05 ` David Long
2016-07-07 19:58 ` Frank Ch. Eigler
2016-08-03 13:13 ` Pratyush Anand
2016-08-03 14:51 ` William Cohen
2016-08-03 15:11 ` David Long
2016-08-03 17:40 ` William Cohen
2016-08-03 20:00 ` Lastest kprobes64 patch David Long
2016-08-03 20:01 ` Frank Ch. Eigler
2016-08-03 20:08 ` David Long
2016-08-04 5:03 ` Pratyush Anand
2016-08-04 13:07 ` David Long
2016-08-04 4:42 ` exercising current aarch64 kprobe support with systemtap Pratyush Anand
2016-08-04 13:57 ` William Cohen
2016-08-04 14:36 ` Pratyush Anand
2016-08-04 14:50 ` William Cohen
2016-08-04 20:51 ` William Cohen
2016-08-17 14:36 ` William Cohen
2016-08-17 18:04 ` David Smith
2016-08-17 18:28 ` William Cohen
2016-08-18 15:07 ` David Smith
2016-08-18 15:16 ` William Cohen
2016-08-18 15:39 ` David Smith
2016-08-18 14:55 ` Pratyush Anand
2016-06-13 16:11 ` William Cohen
2016-06-13 16:15 ` William Cohen [this message]
2016-06-14 4:27 ` Pratyush Anand
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