Hi!
I'm trying to use kmap_atomic from both interrupt and task context.
My idea was to do local_irq_save and then use KM_IRQ0/KM_IRQ1:
since I'm disabling interrupts I assumed that this should be safe.
The relevant code is here:
https://openib.org/svn/gen2/trunk/src/linux-kernel/infiniband/ulp/sdp/sdp_iocb.c
However, under stress I see errors from arch/i386/mm/highmem.c:42
if (!pte_none(*(kmap_pte-idx)))
BUG();
Apparently, my routine, running from a task context, races with
some other kernel code, and so I'm trying to use a slot that was not
yet unmapped.
Anyone has an idea on what I could be doing wrong?
Thanks,
--
MST
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