-------- Original Message -------- From: cheneydeng Sent: 2012年02月22日 星期三 23时38分37秒 To: kernelnewbies Subject: About interrupt handler > hi all, > I'm begin to learn the Kernel and i'm reading <<Linux kernel > development>>.It says "This is an important point, always keep in mind > that all interrupt handler has interrupted other code(possibly even > another interrupt handler on a different line)".What i am not able to > understand is how a interrupt handler be interrupted ? DID NOT it > uninterrupted? It has more related to CPU architecture. Generally, while an interrupt handler is being executed, the handler itself can chose to disable or enable external interrupts (i.e, take x86 for example, IF bit for cflags reg controls this.). If IF is enabled, then the interrupt handler currently being executed may be interrupted and then jump to the entry for the coming interrupt. Thanks, -Zhengwang > > ------------------ > best regards! > cheneydeng > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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