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Date: Fri, 18 May 2012 09:55:13 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: Ning Jiang <ning.n.jiang@...il.com> cc: rjw@...k.pl, linux-kernel@...r.kernel.org Subject: Re: add IRQS_PENDING for nested, simple and level handler to early abort suspend operation On Fri, 18 May 2012, Ning Jiang wrote: > During suspend check_wakeup_irqs() will check IRQS_PENDING flag to > abort a suspend operation, however, this only applies for edge > triggered irq. Add IRQS_PENDING for nested, simple and level handler > to mimic the same behaviour as edge irq handler. > > Without this optimization, level irq can be handled correctly but there > is some penalty. It has to go through a full run/suspend power cycle for level > irq to be detected and handled. With it, we can abort the suspend operation > earlier and thus shorten the interrupt latency. > > I know this is ugly as IRQS_PENDING is intended for edge irq but I don't > know how to do it in a right way. Please enlighten me if you have better ideas. First of all, please send patches inlined. Aside of that a similar patch is queued in tip/irq/core commit d4dc0f90. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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