On 4/20/07, Christian Boon <c.boon@xxxxxxxxxxxxxxxxxxxx> wrote:
Hello, i've got a question about local_irq_save() When i use this function to disable interrupts, does this mean that when an interrupt occurs when interrupts are disabled, for example from the ethernet chip, this interrupt is lost or does it mean that the interrupt isnt serviced at the moment but serviced when interrupts are enabled again?
the interrupt is lost, if it maskable and not unmaskable interrupts IMHO.Because local_irq_save() macro inturn makes use of cli assembly instruction. Somebody please CMIIW.
i've got 2 interrupts in my driver which both need to write data in the same buffer so when i keep interrupts enabled, then i get bad behaviour.
Is the buffer too large.Try writing from different ends on the same buffer for each interrupts.Does this helps anyway? HTH ~psr
Is there a way to lock a buffer from two interrupt service routines without disabling interrupts? thanks in advance, Chris. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
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