On 03/27/2013 05:39 AM, Alex Shi wrote: > On 03/13/2013 10:27 AM, Changlong Xie wrote: >> Hi Len, >> >> FYI, since 3.9-rc1 our three NHM EP/EX LKP(linux kernel performance) test servers >> except SNB/IVB/WSM hung up unexpectly. >> >> We did git bisect for about 8 times on all servers, it said that the first bad commit is ac3ebafa. >> >> commit ac3ebafa81af76d65e4fb45c6388f08e90ddcc6d >> Author: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> >> Date: Mon Feb 4 22:44:43 2013 +0000 > > fixing patch for review: > > > ----------------------- > From 78a74aea386b0969909c2e4ae388024ce71fdb18 Mon Sep 17 00:00:00 2001 > From: Alex Shi <alex.shi@xxxxxxxxx> > Date: Tue, 26 Mar 2013 22:57:47 +0800 > Subject: [PATCH] cpuidle/acpi: recover percpu acpi processor cstate > > Commit: ac3ebafa81af76d6 "ACPI / idle: remove usage of the statedata" > change the percpu processor cstate to a unify unique cstate in acpi > idle. That cause all our NHM box boot hang or panic. > > 2178751 Task dump for CPU 1:^M > 2178752 swapper/1 R running task 6736 0 1 > 0x00000000^M > 2178753 ffff8801e8029dc8 ffffffff8101cf96 ffff8801e8029e28 > ffffffff813d294b^M > 2178754 0000000000000f99 0000000000000003 00000000003cf654 > 0000000025c17d03^M > 2178755 ffff8801e8029e38 ffff8801e74fc000 00000002590dc5c4 > ffffffff8163cdb0^M > 2178756 Call Trace:^M > 2178757 [<ffffffff8101cf96>] ? acpi_processor_ffh_cstate_enter+0x2d/0x2f^M > 2178758 [<ffffffff813d294b>] acpi_idle_enter_bm+0x1b1/0x236^M > 2178759 [<ffffffff8163cdb0>] ? disable_cpuidle+0x10/0x10^M > 2178760 [<ffffffff8163cdc2>] cpuidle_enter+0x12/0x14^M > 2178761 [<ffffffff8163d286>] cpuidle_wrap_enter+0x2f/0x6d^M > 2178762 [<ffffffff8163d2d4>] cpuidle_enter_tk+0x10/0x12^M > 2178763 [<ffffffff8163cdd6>] cpuidle_enter_state+0x12/0x3a^M > 2178764 [<ffffffff8163d4a7>] cpuidle_idle_call+0xe8/0x161^M > 2178765 [<ffffffff81008d99>] cpu_idle+0x5e/0xa4^M > 2178766 [<ffffffff8174c6c1>] start_secondary+0x1a9/0x1ad^M > 2178767 Task dump for CPU 2:^M > > In fact, the acpi idle bases on percpu cstate difference assumption, the > infrastructure use many percpu structures to implement self. > Just unique acpi_processor_cx is far far not enough. > > This patch just is a quick fix by introducing back the percpu cstates. > And keep driver_data away. > > If someone really want to unify the acpi cstates, please make sure whole > software infrastructure changed and get the grant from hardware, > include many kinds of BIOS setting. Hi Alex, could you elaborate a bit the explanation. I don't see where is the analysis of the bug. Why do we have this stack trace ? Thanks -- Daniel -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
