* [ECOS] Thread preemption and blocking IO & device drivers
@ 2004-09-09 15:43 Rycerz Roman-G11565
2004-09-09 15:57 ` Andrew Lunn
0 siblings, 1 reply; 2+ messages in thread
From: Rycerz Roman-G11565 @ 2004-09-09 15:43 UTC (permalink / raw)
To: Ecos-Discuss@Sources. Com (ecos-discuss@sources.redhat.com)
Hi
I have a general question about threads and IO blocking.
If I have 2 tasks A & B.
A is higher priority (bitmap scheduler) and does a blocking read.
Is there anything special the driver has to do to let task B to run ???
Thanks
Roman F. Rycerz
Engr Section Mgr
Test & Tools
Motorola IESS, ACES, PCSG, PCG
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [ECOS] Thread preemption and blocking IO & device drivers
2004-09-09 15:43 [ECOS] Thread preemption and blocking IO & device drivers Rycerz Roman-G11565
@ 2004-09-09 15:57 ` Andrew Lunn
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Lunn @ 2004-09-09 15:57 UTC (permalink / raw)
To: Rycerz Roman-G11565
Cc: Ecos-Discuss@Sources. Com (ecos-discuss@sources.redhat.com)
On Thu, Sep 09, 2004 at 10:43:29AM -0500, Rycerz Roman-G11565 wrote:
> Hi
>
> I have a general question about threads and IO blocking.
>
>
> If I have 2 tasks A & B.
> A is higher priority (bitmap scheduler) and does a blocking read.
>
> Is there anything special the driver has to do to let task B to run ???
Nope, just use the normal device driver APIs and scheduling will work
correctly.
Andrew
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Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
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2004-09-09 15:43 [ECOS] Thread preemption and blocking IO & device drivers Rycerz Roman-G11565
2004-09-09 15:57 ` Andrew Lunn
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