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[Xen-devel] RE: [RFC] [PATCH] Dom0: Don't switch back to user space stac

To: "Yunhong Jiang" <yunhong.jiang@xxxxxxxxx>
Subject: [Xen-devel] RE: [RFC] [PATCH] Dom0: Don't switch back to user space stack in syscall entry
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: 2010年2月12日 08:16:14 +0000
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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>>> "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> 12.02.10 05:30 >>>
>Are there any issue currently for nesting interrupt? The issue here is
>because of the syscall's stack, which is not strictly related to nesting
>interrupt, I think.
For the specific syscall case there probably aren't (but I didn't fully
think this through). But for the general case there are, so if IST-like
support is to be added, it should account for nesting.
Jan
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