linux-kernel - Re: stopping a process during a timer interrupt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 18 Oct 2006 00:56:03 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Kay Tiong Khoo <kaytiong@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: stopping a process during a timer interrupt

* Kay Tiong Khoo | 2006-10-17 18:18:25 [+0800]:

>On a timer interrupt, I tried to stop the current process by changing
>it's run state to TASK_STOPPED via set_current_state(TASK_STOPPED).
>However, this results in a system hang.
>
>I can't find a way to stop the current process during an interrupt
>context. Does such code exist in the kernel? If not, how does one go
>about implementing it from within a kernel module.

Take a look at some driver implementations!
There you will find some ways how to put a process into a sleep state.

Grep for "*->state*TASK_UNINTERRUPTIBLE" and take also a look at the
interaction with schedule() and spinlocks.

>Thanks.
>Kay Tiong

Best regards

-- 
Hagen Pfeifer
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/