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Re: [Xen-devel] [PATCH] x86/IRQ: fix create_irq() after c/s 24068:692817
| To: | Jan Beulich <JBeulich@xxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] x86/IRQ: fix create_irq() after c/s 24068:6928172f7ded |
| From: | Juergen Gross <juergen.gross@xxxxxxxxxxxxxx> |
| Date: | Fri, 04 Nov 2011 14:01:44 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 04 Nov 2011 06:07:34 -0700 |
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On 11/04/2011 12:52 PM, Jan Beulich wrote: init_one_irq_desc() must be called with interrupts enabled (as it may call functions from the xmalloc() group). Rather than mis-using vector_lock to also protect the finding of an unused IRQ, make this lockless through using cmpxchg(), and obtain the lock only around the actual assignment of the vector. Works for me (machine coming up again). Juergen -- Juergen Gross Principal Developer Operating Systems PDG ES&S SWE OS6 Telephone: +49 (0) 89 3222 2967 Fujitsu Technology Solutions e-mail: juergen.gross@xxxxxxxxxxxxxx Domagkstr. 28 Internet: ts.fujitsu.com D-80807 Muenchen Company details: ts.fujitsu.com/imprint.html _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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