Messages in this thread | | | Date | Fri, 26 Mar 2010 07:10:29 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] Prevent nested interrupts when the IRQ stack is near overflowing v2 |
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> Now, I think (and sincerely) that the SCSI situation is likely long since > fixed, but we have thousands and thousands of drivers, and these kinds of > things are very hard to notice automatically. Are there any cases around > that still have busy-loop delays based on real-time in their irq handlers? > I simply don't know.
This case was already broken back when the x86-64 port used to run with NMI watchdog on by default, because any IO exception handling with interrupts off would trigger the NMI watchdog eventually.
I remember having to add bandaids to Fusion for this a long time ago.
Of course ISA drivers might still do it.
-Andi -- ak@linux.intel.com -- Speaking for myself only.
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