Messages in this thread | | | Subject | Re: [RFC][PATCH] irq: remove IRQF_DISABLED | From | Peter Zijlstra <> | Date | Mon, 02 Mar 2009 19:07:28 +0100 |
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On Mon, 2009-03-02 at 18:55 +0100, Bartlomiej Zolnierkiewicz wrote: > > Could we make just the IDE driver itself enable interrupts? Sure. But that > > Actually it has been doing it for years (some host drivers don't do this by > default and still need "hdparm -u" or equivalent but I was planning to change > it for 2.6.30).
What does it use to do that? A local_irq_enable() in hardirq context will make lockdep yell bloody murder :-).
Then there is local_irq_enable_in_hardirq(), which plain simply lies when lockdep is enabled -- IOW it would generate horrid irq latencies.
Not having to deal with IRQ recursion in lockdep helps.
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