From: Andi Kleen <ak@suse.de>
To: "Satyam Sharma" <satyam.sharma@gmail.com>
Cc: "Heiko Carstens" <heiko.carstens@de.ibm.com>,
"Jan Glauber" <jan.glauber@de.ibm.com>,
"David Miller" <davem@davemloft.net>,
akpm@osdl.org, mingo@elte.hu, schwidefsky@de.ibm.com,
linux-kernel@vger.kernel.org, "Alan Cox" <alan@redhat.com>
Subject: Re: [patch] i386/x86_64: smp_call_function locking inconsistency
Date: Fri, 8 Jun 2007 21:43:51 +0200 [thread overview]
Message-ID: <200706082143.52191.ak@suse.de> (raw)
In-Reply-To: <a781481a0706070954l636d752am82ef7ca9703788aa@mail.gmail.com>
> Indeed -- this was doubly problematic because the un-safeness
> was because of smp_processor_id() as well as the (eventual)
> access of cpu_online_map (via smp_call_function() ->
> num_online_cpus()) ... thanks for letting me know about this.
CPU hotplug is changed to use the freezer anyways. It is known
that the current handling of these maps in preempt has various holes and this
little case here won't make it overall much worse.
-Andi
next prev parent reply other threads:[~2007-06-08 19:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-08 20:32 [patch] i386/x86_64: smp_call_function locking inconsistency Heiko Carstens
2007-02-08 20:43 ` David Miller
2007-02-09 8:42 ` Heiko Carstens
2007-02-09 12:57 ` Jan Glauber
2007-06-07 14:07 ` Satyam Sharma
2007-06-07 16:27 ` Heiko Carstens
2007-06-07 16:54 ` Satyam Sharma
2007-06-07 17:18 ` Satyam Sharma
2007-06-07 17:22 ` Avi Kivity
2007-06-07 17:33 ` Satyam Sharma
2007-06-10 7:38 ` Avi Kivity
2007-06-08 19:43 ` Andi Kleen [this message]
2007-06-08 19:42 ` Andi Kleen
2007-02-09 7:40 ` Andi Kleen
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