On Wed, Jul 25, 2012 at 8:27 PM, Avi Kivity <avi@xxxxxxxxxx> wrote:
> On 07/25/2012 01:58 PM, Avi Kivity wrote:
>>> while (len > 0) {
>>> page = addr & TARGET_PAGE_MASK;
>>> l = (page + TARGET_PAGE_SIZE) - addr;
>>> if (l > len)
>>> l = len;
>>> +
>>> + qemu_rwlock_rdlock_devtree();
>>> section = phys_page_find(page >> TARGET_PAGE_BITS);
>>
>> Does the devtree lock also protect the data structures accessed by
>> phys_page_find()? Seems wrong.
>
> The right way is to object_ref() in core_region_add() and object_unref()
> in core_region_del(). We're guaranteed that mr->object is alive during
> _add(), and DeviceClass::unmap() ensures that the extra ref doesn't
> block destruction.
>
OK, I see. I will try in this way. But when
memory_region_destroy()->..->core_region_del(), should we reset the
lp.ptr to phys_section_unassigned , otherwise, if using removed
target_phys_addr_t, we will still get the pointer to invalid
MemoryRegion?
Thanx, pingfan
> --
> error compiling committee.c: too many arguments to function
>
>
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