Messages in this thread | | | Date | Thu, 18 Apr 2013 22:06:13 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH 1/2 V2] iommu/amd: Add workaround for ERBT1312 |
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On Thu, Apr 18, 2013 at 01:56:42PM -0500, Suthikulpanit, Suravee wrote: > On 4/18/2013 1:35 PM, Joerg Roedel wrote:
> According to the "kernel/irq/handle.c:irq_wake_thread()", I thought > that for the threaded IRQ, if the system getting a new interrupt > from the device while the thread is running, it will just return and > do nothing.
Yes, but the irq-thread function itself executes the handler function repeatedly until the IRQTF_RUNTHREAD bit is cleared. And every new interrupt will set this bit again. So when there is a new interrupt while our handler function runs the handler will be called again by the irq-thread.
Joerg
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