Re: [Qemu-devel] [PATCH] honor IDE_DMA_BUF_SECTORS

[Stefano Stabellini]

Avi Kivity wrote:

> Stefano Stabellini wrote:
>> Hi all,
>> after the recent introduction of dma_buf_prepare we stopped honoring
>> IDE_DMA_BUF_SECTORS (the guest can issue dma requests with a greater
>> total length than IDE_DMA_BUF_SECTORS).
>> This patch adds the IDE_DMA_BUF_SECTORS limit back in place.
>>
>> Comments are welcome.
>>   
> 
> Aren't 64K sector requests legal?
> 
> Looking at ide_cmd_lba48_transform().
> 


I am not sure about that, but I would think not since we define 
MAX_MULT_SECTORS 16
If I change MAX_MULT_SECTORS, am I supposed to see smaller dma requests?