From: Juergen Gross <juergen.gross@ts.fujitsu.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH] x86/IRQ: fix create_irq() after c/s 24068:6928172f7ded
Date: Fri, 04 Nov 2011 14:01:44 +0100 [thread overview]
Message-ID: <4EB3E238.7030205@ts.fujitsu.com> (raw)
In-Reply-To: <4EB3E02B020000780005F027@nat28.tlf.novell.com>
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
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next prev parent reply other threads:[~2011-11-04 13:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-04 11:52 [PATCH] x86/IRQ: fix create_irq() after c/s 24068:6928172f7ded Jan Beulich
2011-11-04 13:01 ` Juergen Gross [this message]
2011-11-04 14:41 ` Keir Fraser
2011-11-04 15:05 ` Jan Beulich
2011-11-04 16:34 ` Keir Fraser
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