From: per.fransson.ml@gmail.com (Per Fransson)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Add call to non-crashing cores through IPI
Date: Mon, 22 Nov 2010 23:30:32 +0100 [thread overview]
Message-ID: <AANLkTikmq7ykPQ05fAvbpeXN6PZqcNKms8rJvVV0BOqw@mail.gmail.com> (raw)
In-Reply-To: <AANLkTikQX9YqR42u6ppzceHL58JqBsVxR3YJr6_BarbY@mail.gmail.com>
On Mon, Nov 22, 2010 at 11:14 PM, Per Fransson
<per.fransson.ml@gmail.com> wrote:
>>>
>>> That's for the situation when the other core tries to send an IPI at
>>> the same time. Unlikely but both cores may deadlock.
>>>
>>
>> Am I right that deadlock can occur only if the same IPI was sent? And
>> there should
>> be no situation when CRASH_DUMP IPI was sent from different processors at
>> the same time.
>>
>
> I hope you are right, but I can't see why we couldn't get a crash IPI
> from several
> processors at the same time, unfortunately.
>
I'll just follow up my own post here. On second thought, crash_kexec()
takes the kexec_mutex,
so simultaneous crash IPIs probably couldn't happen.
/Per
next prev parent reply other threads:[~2010-11-22 22:30 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-19 10:08 [PATCH] Add call to non-crashing cores through IPI Per Fransson
2010-11-22 7:24 ` Mika Westerberg
2010-11-22 9:47 ` Maxim Uvarov
2010-11-22 9:53 ` Per Fransson
2010-11-22 10:47 ` Russell King - ARM Linux
2010-11-22 11:27 ` Russell King - ARM Linux
2010-11-22 13:07 ` Santosh Shilimkar
2010-11-22 14:21 ` Russell King - ARM Linux
2010-11-22 17:25 ` Santosh Shilimkar
2010-11-22 14:31 ` Per Fransson
2010-11-22 14:40 ` Russell King - ARM Linux
2010-11-22 17:03 ` Per Fransson
2010-11-22 17:12 ` Catalin Marinas
2010-11-22 20:09 ` Maxim Uvarov
2010-11-22 22:14 ` Per Fransson
2010-11-22 22:30 ` Per Fransson [this message]
2010-11-23 9:14 ` Catalin Marinas
2010-11-23 10:57 ` Per Fransson
2010-11-23 12:37 ` Catalin Marinas
2010-11-23 12:41 ` Mika Westerberg
2010-11-23 12:48 ` Catalin Marinas
2010-11-23 13:01 ` Maxim Uvarov
2010-11-23 16:31 ` Per Fransson
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