On Wednesday, 22 August 2007 11:06, Andrew Morton wrote:
>
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/
I get this during resume from suspend to RAM and during hibernation:
WARNING: at /home/rafael/src/mm/linux-2.6.23-rc3-mm1/arch/x86_64/kernel/smp.c:380 smp_call_function_single()
Call Trace:
[<ffffffff8021a97d>] smp_call_function_single+0x52/0xff
[<ffffffff8022e703>] task_rq_lock+0x3d/0x6f
[<ffffffff80230fc0>] set_cpus_allowed+0xbf/0xcc
[<ffffffff802141ab>] sc_freq_event+0x5f/0x63
[<ffffffff80431c38>] notifier_call_chain+0x33/0x65
[<ffffffff8024c11f>] __srcu_notifier_call_chain+0x4b/0x69
[<ffffffff8024c14c>] srcu_notifier_call_chain+0xf/0x11
[<ffffffff803bcfa4>] cpufreq_resume+0x131/0x157
[<ffffffff8038151c>] __sysdev_resume+0x34/0x73
[<ffffffff80381b76>] sysdev_resume+0x1f/0x61
[<ffffffff803865e8>] device_power_up+0x9/0x10
[<ffffffff80256620>] suspend_devices_and_enter+0xbf/0xf7
[<ffffffff802567bb>] enter_state+0x163/0x1e5
[<ffffffff802568e1>] state_store+0xa4/0xc2
[<ffffffff802d7bc5>] subsys_attr_store+0x31/0x33
[<ffffffff802d7e8d>] sysfs_write_file+0xe0/0x11c
[<ffffffff80293b77>] vfs_write+0xc7/0x150
[<ffffffff802940f8>] sys_write+0x47/0x70
[<ffffffff8020bdce>] system_call+0x7e/0x83
Apparently, smp_call_function_single() is unhappy, because it's called with
interrupts disabled by sc_freq_event() executed (as a notifier) by
cpufreq_resume(). However, cpufreq_resume() is always run with one CPU on
line, so all this stuff should be handled differently. Oh, dear.
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