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[Xen-devel] Re: Avoid alloc for xsave before xsave_init
| To: | "Wei, Gang" <gang.wei@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: Avoid alloc for xsave before xsave_init |
| From: | Keir Fraser <keir@xxxxxxx> |
| Date: | Thu, 13 Jan 2011 21:13:09 +0000 |
| Cc: | |
| Delivery-date: | Thu, 13 Jan 2011 13:14:18 -0800 |
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| Thread-topic: | Avoid alloc for xsave before xsave_init |
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On 13/01/2011 18:48, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
> While debugging some weird booting failure bugs, just found currently,
> xsave_alloc_save_area will be called in
> init_idle_domain->scheduler_init->alloc_vcpu->vcpu_initialise calls, it is
> earlier than xsave_init called in identity_cpu(). This may causing buffer
> overflow on xmem_pool. I am thinking about how to fix it.
I doubt idle vcpus need an xsave context. Can we check for is_idle_vcpu() in
xsave_{alloc,free}_save_area()?
Is this an issue only for xen-unstable/4.1 (not 4.0)?
-- Keir
> Jimmy
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