Andrea Arcangeli wrote:
> On Thu, Jan 31, 2008 at 08:50:01AM +0200, Avi Kivity wrote:
>
>> This is surprising. pagefault_disable() is really a preempt_disable(), and
>> kvm_read_guest_atomic() should only be called from atomic contexts (with
>> preemption already disabled), no?
>>
>
> _spin_lock calls preempt_disable() and that's the result with PREEMPT=n:
>
> #define preempt_disable() do { } while (0)
>
> pagefault_disable always calls into inc_preempt_count() which is why
> kmap_atomic uses it instead of preempt_disable().
>
I see. Will merge that patch, thanks.
--
error compiling committee.c: too many arguments to function
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
kvm-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/kvm-devel
