On Wed, Feb 4, 2015 at 9:35 AM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Hi all,
>
> The next release I will be making will be next-20150209 - which will
> probably be after the v3.19 release.
>
> Changes since 20150203:
>
> The sound-asoc tree gained a conflict against the sound tree.
>
> The scsi tree gained a build failure caused by an interaction with the
> driver-core tree.  I applied a merge fix patch.
>
> The akpm-current tree gained a build failure for which I disabled
> CONFIG_KASAN.
>
> Non-merge commits (relative to Linus' tree): 7461
>  7314 files changed, 309736 insertions(+), 172363 deletions(-)
>
> ----------------------------------------------------------------------------
>

[ CC linux-rcu | linux-pm | intel_pstate maintainers ]

Hi,

after suspend-and-resume I see the following call-trace:
...
[ 1144.482666] Disabling non-boot CPUs ...
[ 1144.483000] intel_pstate CPU 1 exiting
[ 1144.486064]
[ 1144.486065] ===============================
[ 1144.486067] smpboot: CPU 1 didn't die...
[ 1144.486067] [ INFO: suspicious RCU usage. ]
[ 1144.486069] 3.19.0-rc7-next-20150204.1-iniza-small #1 Not tainted
[ 1144.486070] -------------------------------
[ 1144.486072] include/trace/events/tlb.h:35 suspicious
rcu_dereference_check() usage!
[ 1144.486073]
[ 1144.486073] other info that might help us debug this:
[ 1144.486073]
[ 1144.486074]
[ 1144.486074] RCU used illegally from offline CPU!
[ 1144.486074] rcu_scheduler_active = 1, debug_locks = 0
[ 1144.486076] no locks held by swapper/1/0.
[ 1144.486076]
[ 1144.486076] stack backtrace:
[ 1144.486079] CPU: 1 PID: 0 Comm: swapper/1 Not tainted
3.19.0-rc7-next-20150204.1-iniza-small #1
[ 1144.486080] Hardware name: SAMSUNG ELECTRONICS CO., LTD.
530U3BI/530U4BI/530U4BH/530U3BI/530U4BI/530U4BH, BIOS 13XK 03/28/2013
[ 1144.486085]  0000000000000001 ffff88011a44fe18 ffffffff817e370d
0000000000000011
[ 1144.486088]  ffff88011a448290 ffff88011a44fe48 ffffffff810d6847
ffff8800c66b9600
[ 1144.486091]  0000000000000001 ffff88011a44c000 ffffffff81cb3900
ffff88011a44fe78
[ 1144.486092] Call Trace:
[ 1144.486099]  [<ffffffff817e370d>] dump_stack+0x4c/0x65
[ 1144.486104]  [<ffffffff810d6847>] lockdep_rcu_suspicious+0xe7/0x120
[ 1144.486109]  [<ffffffff810b71a5>] idle_task_exit+0x205/0x2c0
[ 1144.486113]  [<ffffffff81054c4e>] play_dead_common+0xe/0x50
[ 1144.486116]  [<ffffffff81054ca5>] native_play_dead+0x15/0x140
[ 1144.486121]  [<ffffffff8102963f>] arch_cpu_idle_dead+0xf/0x20
[ 1144.486123]  [<ffffffff810cd89e>] cpu_startup_entry+0x37e/0x580
[ 1144.486126]  [<ffffffff81053e20>] start_secondary+0x140/0x150
[ 1144.502920] intel_pstate CPU 2 exiting
...

Not sure if this comes from the rcu or pm/intel_pstate area.

Please have a look.

Thanks.

- Sedat -