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Re: [Xen-devel] Re: how to handle paged hypercall args?

From: Keir Fraser <keir@xxxxxxx>

Date: Fri, 03 Dec 2010 06:13:43 -0800

Cc: Patrick Colp <pjcolp@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>

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Thread-topic: [Xen-devel] Re: how to handle paged hypercall args?

On 03/12/2010 01:03, "Olaf Hering" <olaf@xxxxxxxxx> wrote: > in my testing the BUG_ON in __prepare_to_wait() triggers, 1500 is too > small. I changed it to 4096 - (4*sizeof(void*)) to fix it for me. > 3K would be enough as well. > How large can the stack get, is there an upper limit? It can get pretty deep with nested interrupts. I wouldn't expect a guest's hypercall stack to get very deep at all. Send me a BUG_ON() backtrace. That said, making the saved-stack area bigger isn't really a problem. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel

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