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Groups > linux.kernel > #1515845
| From | Wanpeng Li <kernellwp@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v7 2/2] x86/apic: x2apic write eoi msr notrace |
| Date | 2016-11-07 05:40 +0100 |
| Message-ID | <sAJSW-6w9-7@gated-at.bofh.it> (permalink) |
| References | <sy9JU-41p-5@gated-at.bofh.it> <sy9JU-41p-15@gated-at.bofh.it> <szb6W-384-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
2016-11-03 5:10 GMT+08:00 Borislav Petkov <bp@alien8.de>: > On Mon, Oct 31, 2016 at 09:37:02AM +0800, Wanpeng Li wrote: >> From: Wanpeng Li <wanpeng.li@hotmail.com> >> >> | RCU used illegally from idle CPU! >> | rcu_scheduler_active = 1, debug_locks = 0 >> | RCU used illegally from extended quiescent state! >> | no locks held by swapper/1/0. >> | >> | [<ffffffff9d492b95>] do_trace_write_msr+0x135/0x140 >> | [<ffffffff9d06f860>] native_write_msr+0x20/0x30 >> | [<ffffffff9d065fad>] native_apic_msr_eoi_write+0x1d/0x30 >> | [<ffffffff9d05bd1d>] smp_reschedule_interrupt+0x1d/0x30 >> | [<ffffffff9d8daec6>] reschedule_interrupt+0x96/0xa0 > > Please remove the text between [] and the offsets after "+..." - those > are useless in a commit message. > >> Reschedule interrupt may be called in cpu idle state. This causes lockdep > > s/cpu/CPU/ > >> check warning above. >> >> As Peterz pointed out: >> >> | So now we're making a very frequent interrupt slower because of debug >> | code. >> | >> | The thing is, many many smp_reschedule_interrupt() invocations don't >> | actually execute anything much at all and are only send to tickle the > > s/send/sent/ I will send a new version to clean it up. Regards, Wanpeng Li
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[PATCH v7 0/2] x86/apic: x2apic write eoi msr notrace Wanpeng Li <kernellwp@gmail.com> - 2016-10-31 02:40 +0100
[PATCH v7 1/2] x86/msr: Add write msr notrace Wanpeng Li <kernellwp@gmail.com> - 2016-10-31 02:40 +0100
Re: [PATCH v7 1/2] x86/msr: Add write msr notrace Borislav Petkov <bp@alien8.de> - 2016-11-02 22:20 +0100
[PATCH v7 2/2] x86/apic: x2apic write eoi msr notrace Wanpeng Li <kernellwp@gmail.com> - 2016-10-31 02:40 +0100
Re: [PATCH v7 2/2] x86/apic: x2apic write eoi msr notrace Borislav Petkov <bp@alien8.de> - 2016-11-02 22:20 +0100
Re: [PATCH v7 2/2] x86/apic: x2apic write eoi msr notrace Wanpeng Li <kernellwp@gmail.com> - 2016-11-07 05:40 +0100
Re: [PATCH v7 0/2] x86/apic: x2apic write eoi msr notrace Borislav Petkov <bp@alien8.de> - 2016-11-02 22:20 +0100
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