From: Jens Axboe <jens.axboe@oracle.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: linux-kernel@vger.kernel.org, npiggin@suse.de, paulus@samba.org,
tglx@linutronix.de, mingo@redhat.com
Subject: Re: [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single()
Date: Sat, 22 Mar 2008 13:29:03 +0100 [thread overview]
Message-ID: <20080322122903.GD15355@kernel.dk> (raw)
In-Reply-To: <1FE6DD409037234FAB833C420AA843ECE1387F@orsmsx424.amr.corp.intel.com>
On Fri, Mar 21 2008, Luck, Tony wrote:
> > My thinking was that it may need a bit of help to ensure that the init
> > function for single call data works,
>
> The problem may be worse than that. I see that you have a per-cpu
> "call_single_queue" on which you do some list operations. On ia64
> the per-cpu variables live at the same virtual address on each processor
> with a per-cpu TLB mapping directing them to a different physical
> address on each. This makes Linux lists very confused.
Funky, how does accessing other CPU's per-cpu variables work on ia64
then? Perhaps I made some false assumptions. Unfortunately I have no
access to any IA64 machines, so I either have to yank the ia64 bits
(which is unfortunate, since Alan tests on those :-) or rely on a bit of
help from you and/or others in getting that bit right.
--
Jens Axboe
next prev parent reply other threads:[~2008-03-22 12:29 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-19 11:56 [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single() Jens Axboe
2008-03-19 11:56 ` [PATCH 1/5] Add generic helpers for arch IPI function calls Jens Axboe
2008-03-19 11:56 ` [PATCH 2/5] x86: convert to generic helpers for " Jens Axboe
2008-03-19 11:56 ` [PATCH 3/5] x86-64: " Jens Axboe
2008-03-19 11:56 ` [PATCH 4/5] powerpc: " Jens Axboe
2008-03-19 11:56 ` [PATCH 5/5] ia64: " Jens Axboe
2008-03-21 9:53 ` [PATCH 0/5] Generic smp_call_function(), improvements, and smp_call_function_single() Ingo Molnar
2008-03-21 13:15 ` Jens Axboe
2008-03-25 8:00 ` Nick Piggin
2008-03-27 10:08 ` Ingo Molnar
2008-03-27 10:37 ` Jens Axboe
2008-03-27 10:43 ` Ingo Molnar
2008-03-27 12:02 ` Jens Axboe
2008-03-27 12:32 ` Ingo Molnar
2008-03-27 12:35 ` Jens Axboe
2008-03-21 18:22 ` Luck, Tony
2008-03-21 18:31 ` Jens Axboe
2008-03-21 18:56 ` Luck, Tony
2008-03-22 12:29 ` Jens Axboe [this message]
2008-03-24 16:45 ` Luck, Tony
2008-03-24 20:28 ` Luck, Tony
2008-03-25 8:12 ` Jens Axboe
2008-03-25 16:48 ` Luck, Tony
2008-03-25 18:00 ` Jens Axboe
2008-03-21 20:04 ` Luck, Tony
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