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[Xen-devel] the irq_enter in do_IRQ
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] the irq_enter in do_IRQ |
| From: | "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> |
| Date: | Sat, 18 Sep 2010 10:22:53 +0800 |
| Accept-language: | en-US |
| Acceptlanguage: | en-US |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 17 Sep 2010 19:23:42 -0700 |
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| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| Thread-index: | ActW2GY52z5eudSvQ3CQE+pPFskTvA== |
| Thread-topic: | the irq_enter in do_IRQ |
Hi, Keir, in do_IRQ, why do we call the irq_enter only in __do_IRQ_guest and the action->handler(), instead of the whole flow of do_IRQ? I asked this because we noticed a bug that the map/unmap_domain_page() is called in a interrupt handler's ack() method, which is not guarded by irq_enter(), thus the "ASSERT(!in_irq())" in map/unmap_domain_page() is not work expected to guard this calling. Thanks --jyh _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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