Messages in this thread | | | Date | Tue, 8 Aug 2006 03:12:27 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [RESEND] [PATCH] ACPI - change GFP_ATOMIC to GFP_KERNEL for non-atomic allocation |
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On Mon, 7 Aug 2006, Andrew Morton wrote:
> acpi_os_acquire_object() is fixed in -rc4. I queued the > acpi_pci_link_set() improvement for sending on to Len, thanks.
Thanks. Unfortunately, looking at the refactorized ACPI code in 2.6.18-rc4, there are still issues with sleeping functions called with disabled interrupts (during resume), in ACPI code.
Two random examples:
- when acpi_pci_link_set() is called during resume (local irqs off), the following callchain happens, which is bad: acpi_pci_link_resume -> acpi_pci_link_set -> acpi_set_current_resources -> acpi_rs_set_srs_method_data -> acpi_ns_evaluate -> acpi_ns_get_node .. here the mutex is acquired. Not good.
- device_power_up -> sysdev_resume -> __sysdev_resume -> cpufreq_resume -> blocking_notifier_call_chain -> down on semaphore. Not good.
Is there any general idea for solution?
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