Yinghai Lu <ying...@kernel.org> writes:
> On Wed, Jan 9, 2013 at 1:15 PM, Yinghai Lu <ying...@kernel.org> wrote:
>> On Wed, Jan 9, 2013 at 1:00 PM, Eric W. Biederman <ebied...@xmission.com>
>> wrote:
>>> Yinghai Lu <ying...@kernel.org> writes:
>>>
>>>> please check updated attached. It should address all your request.
>>>
>>> There is one significant bug that I can see.
>>>
>>> swiotlb_print_info tests no_iotlb_memory but no_iotlb_memory is set
>>> after swiotlb_init_with_tlb returns.
>>
>> there is another swiotlb_print_info calling from
>> pci_swiotlb_late_init
>>
>> void __init pci_swiotlb_late_init(void)
>> {
>> /* An IOMMU turned us off. */
>> if (!swiotlb)
>> swiotlb_free();
>> else {
>> printk(KERN_INFO "PCI-DMA: "
>> "Using software bounce buffering for IO (SWIOTLB)\n");
>> swiotlb_print_info();
>> }
>> }
>>
>> so we need that checking when swiotlb == 1, but actually we can not
>> allocate that before.
>
> Eric, so the code is right to put checking in swiotlb_print_info ?
My biggest question was really why you didn't set no_iotlb
sooner. But shrug I didn't see any real issue with the code except
for it being silly.
Certainly since we are calling swiotlb_print_info from outside swiotlb.c
the check is needed.
> I'd like to post the whole patchset again and ask HPA to put them in tip/next
> to catch -v3.9 merging window.
Eric
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