* (no subject)
@ 2008-02-03 11:13 am kara
2008-02-03 18:23 ` Benny Halevy
0 siblings, 1 reply; 2+ messages in thread
From: am kara @ 2008-02-03 11:13 UTC (permalink / raw)
To: linux-kernel
hello,
If kernel does kmap_atomic(temporary kernel mapping)
on behalf of a process by a cpu, does the process will
continue to run and no other process can be scheduled
to switch it off?(till kunmap_atomic is done)
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^ permalink raw reply [flat|nested] 2+ messages in thread* Re:
2008-02-03 11:13 am kara
@ 2008-02-03 18:23 ` Benny Halevy
0 siblings, 0 replies; 2+ messages in thread
From: Benny Halevy @ 2008-02-03 18:23 UTC (permalink / raw)
To: am kara; +Cc: linux-kernel
am kara wrote:
> hello,
>
> If kernel does kmap_atomic(temporary kernel mapping)
> on behalf of a process by a cpu, does the process will
> continue to run and no other process can be scheduled
> to switch it off?(till kunmap_atomic is done)
Effectively, kmap_atomic implementations call pagefault_disable
and that in turn is equivalent to preempt_disable()
so the answer to your question seems to be "yes".
Benny
^ permalink raw reply [flat|nested] 2+ messages in thread
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