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] [day] [month] [year] [list]

Date:	Thu, 19 Oct 2006 11:38:00 +0800
From:	Kay Tiong Khoo <kaytiong@...il.com>
To:	Hagen Paul Pfeifer <hagen@...u.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: stopping a process during a timer interrupt

Thanks!

For the record, I was trying to sleep kernel threads as well as user  
threads. That didn't work out too well.

All worked fine when I only attempted to sleep user threads.

Kay Tiong

On Oct 18, 2006, at 6:56 AM, Hagen Paul Pfeifer wrote:

> * 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/