From: riel@surriel.com (Rik van Riel)
To: kernelnewbies@lists.kernelnewbies.org
Subject: In SMP system, is there any api to disable IRQ for all CPUs?
Date: Thu, 01 Oct 2015 22:01:24 -0400 [thread overview]
Message-ID: <560DE574.9090203@surriel.com> (raw)
In-Reply-To: <CANudz+u2euW1WN=jaUhM0n01sVc6P_8t+mzRjSgmDM5cTiYubw@mail.gmail.com>
On 10/01/2015 11:49 AM, loody wrote:
> hi all:
> is there any kernel API can let IRQ disable for all CPU in SMP system
> for a while?
> I just need it for a experiment on my module.
>
> such as:
> xxxx --> disable SMP all cpu IRQ
> OOO ---> no interrupt happen
> OOO ---> no interrupt happen
> zzzz ---> enable SMP all cou IRQ
Look at the code in kernel/stop_machine.c
--
All rights reversed.
prev parent reply other threads:[~2015-10-02 2:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-01 15:49 In SMP system, is there any api to disable IRQ for all CPUs? loody
2015-10-02 2:01 ` Rik van Riel [this message]
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