The following patch: x86-kmap_atomic-debugging.patch exposed a badness
in 3w_xxx driver. I'm getting a lot of:
Apr 9 13:00:04 nickolas kernel: kmap_atomic: local irqs are enabled while using KM_IRQn
Apr 9 13:00:04 nickolas kernel: <c0104103> show_trace+0x13/0x20 <c010412e> dump_stack+0x1e/0x20
Apr 9 13:00:04 nickolas kernel: <c01159c9> kmap_atomic+0x79/0xe0 <c028b885> tw_transfer_internal+0x85/0xa0
Apr 9 13:00:04 nickolas kernel: <c028ca7e> tw_interrupt+0x3fe/0x820 <c0143b9e> handle_IRQ_event+0x3e/0x80
Apr 9 13:00:04 nickolas kernel: <c0143c70> __do_IRQ+0x90/0x100 <c01057a6> do_IRQ+0x26/0x40
Apr 9 13:00:04 nickolas kernel: <c010396e> common_interrupt+0x1a/0x20 <c0101cdd> cpu_idle+0x4d/0xb0
Apr 9 13:00:04 nickolas kernel: <c010f2cc> start_secondary+0x24c/0x4b0 <00000000> 0x0
Apr 9 13:00:04 nickolas kernel: <c214ffb4> 0xc214ffb4
I'm running 32 bit kernel on AMD64x2 w/ HIGHMEM enabled.
I think this is an old bug since the 3w_xxxx.c has not been changed for
a long time (at least since 2.6.16-rc1-mm4).
Please let me know if you want me to try some patches.
--
With best wishes,
Nick Orlov.
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