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Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel

From Borislav Petkov <bp@alien8.de>
Newsgroups linux.kernel
Subject Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel
Date 2017-01-10 01:00 +0100
Message-ID <sXS14-29K-11@gated-at.bofh.it> (permalink)
References (5 earlier) <sXEAO-2pA-11@gated-at.bofh.it> <sXQsi-1ot-19@gated-at.bofh.it> <sXRom-1WC-19@gated-at.bofh.it> <sXRHH-231-9@gated-at.bofh.it> <sXRRn-26v-9@gated-at.bofh.it>
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On Tue, Jan 10, 2017 at 12:40:39AM +0100, Borislav Petkov wrote:
> Lemme run it.

Well, it boots but I get:

[    0.291447] ------------[ cut here ]------------
[    0.291702] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree.c:3993 rcu_scheduler_starting+0x5c/0x70
[    0.292107] Modules linked in:
[    0.292277] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.10.0-rc3+ #21
[    0.292540] Hardware name: HP HP EliteBook 745 G3/807E, BIOS N73 Ver. 01.08 01/28/2016
[    0.292893] Call Trace:
[    0.293072]  ? dump_stack+0x46/0x63
[    0.293285]  ? __warn+0xec/0x110
[    0.293487]  ? rcu_scheduler_starting+0x5c/0x70
[    0.293735]  ? kernel_init_freeable+0x58/0x19a
[    0.293976]  ? rest_init+0x80/0x80
[    0.294153]  ? kernel_init+0xa/0x100
[    0.294334]  ? ret_from_fork+0x22/0x30
[    0.294525] ---[ end trace 4c0fe009ed4dc740 ]---

TBH, I like Rafael's suggestion in the other mail to stick with fixing
this in ACPI, especially this is an ACPI problem, not RCU. Well,
more or less: RCU could be taught to *not* do schedule_work() if
workqueue_init() hasn't happened yet but that's a tangential.

So, I'm going to bed. When I wake up, I want to see working fixes!

:-)))

Thanks dudes!

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

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Thread

Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> - 2017-01-08 00:40 +0100
  Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-08 01:10 +0100
    Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-08 01:30 +0100
      Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-08 01:40 +0100
        Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-08 02:00 +0100
          Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-08 02:10 +0100
            Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-08 02:50 +0100
              Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-08 03:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-08 14:10 +0100
                RE: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Zheng, Lv" <lv.zheng@intel.com> - 2017-01-09 03:00 +0100
                RE: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Zheng, Lv" <lv.zheng@intel.com> - 2017-01-09 03:40 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-09 10:40 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-09 23:20 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-09 23:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 00:20 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-10 00:20 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 00:40 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-10 00:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-10 01:00 +0100
                RE: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Zheng, Lv" <lv.zheng@intel.com> - 2017-01-10 01:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-10 02:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 03:30 +0100
                RE: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Zheng, Lv" <lv.zheng@intel.com> - 2017-01-10 06:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 07:00 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-11 10:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-11 11:00 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-11 11:10 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-11 11:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-10 10:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-11 04:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-11 10:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 01:00 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()  and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rafael@kernel.org> - 2017-01-10 00:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-01-10 01:30 +0100
                RE: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Zheng, Lv" <lv.zheng@intel.com> - 2017-01-09 06:30 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Jörg Rödel <joro@8bytes.org> - 2017-01-09 12:00 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux kernel "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2017-01-09 23:50 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Borislav Petkov <bp@alien8.de> - 2017-01-10 00:00 +0100
                Re: 174cc7187e6f ACPICA: Tables: Back port  acpi_get_table_with_size() and early_acpi_os_unmap_memory() from Linux  kernel Jörg Rödel <joro@8bytes.org> - 2017-01-10 15:00 +0100

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