Messages in this thread | | | From | Matthias Urlichs <> | Subject | Call chain analysis | Date | Wed, 30 Mar 2005 15:04:28 +0200 |
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Hi,
I'm running into an IRQ problem while removing USB adapters (e.g., when pulling a PCMCIA card with an OHCI on it).
Specifically, this call chain usb_hcd_pci_remove -> hcd_buffer_destroy -> dma_pool_destroy -> pool_free_page -> free_hot_cold_page -> IRQ -> usb_hcd_irq results in a crash. That's not the immediate problem, though.
The problem is that wrapping usb_hcd_pci_remove() in a local_irq_save/ /restore *still* allows that interrupt to happen. I suspect that something in that call chain sometimes calls the scheduler ..?
I assume that there are nice tools which find that call for me, and save me from plowing through a lot of kernel code ..? I've never needed one of those before. :-/
-- Matthias Urlichs | {M:U} IT Design @ m-u-it.de | smurf@smurf.noris.de
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