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xen-devel
[Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and d
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To: |
Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options. |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Thu, 15 Feb 2007 23:25:01 -0800 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, Dan Hecht <dhecht@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Chris Wright <chrisw@xxxxxxxxxxxx>, Andi Kleen <ak@xxxxxx>, virtualization@xxxxxxxxxxxxxx, Steven Hand <steven.hand@xxxxxxxxxxxx> |
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Thu, 15 Feb 2007 23:24:15 -0800 |
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<20070216022449.739760547@xxxxxxxx> <20070216022531.570154735@xxxxxxxx> <45D54BD5.8010707@xxxxxxxxxx> <20070215230611.d89e26be.akpm@xxxxxxxxxxxxxxxxxxxx> |
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Andrew Morton wrote:
> On Thu, 15 Feb 2007 22:14:45 -0800 Dan Hecht <dhecht@xxxxxxxxxx> wrote:
>
>
>>> config PREEMPT
>>> bool "Preemptible Kernel (Low-Latency Desktop)"
>>> + depends on !XEN
>>> help
>>> This option reduces the latency of the kernel by making
>>> all kernel code (that is not executing in a critical section)
>>>
>>>
>
> Oh, so that's why it doesn't break when CONFIG_PREEMPT=y. In which case
> that preempt_disable() I spotted is wrong-and-unneeded.
>
> Why doesn't Xen work with preemption??
>
I've forgotten the details. Ian? Keir? Steven? Maybe it can be done.
J
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