On 10/18/18 8:06 PM, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 07:52:59PM -0600, Jens Axboe wrote:
>> On 10/18/18 7:39 PM, Ming Lei wrote:
>>> On Thu, Oct 18, 2018 at 07:33:50PM -0600, Jens Axboe wrote:
On 10/18/18 7:28 PM, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens
On Thu, Oct 18, 2018 at 07:52:59PM -0600, Jens Axboe wrote:
> On 10/18/18 7:39 PM, Ming Lei wrote:
> > On Thu, Oct 18, 2018 at 07:33:50PM -0600, Jens Axboe wrote:
> >> On 10/18/18 7:28 PM, Ming Lei wrote:
> >>> On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
> On 10/18/18 7:18 AM,
On 10/18/18 7:39 PM, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 07:33:50PM -0600, Jens Axboe wrote:
>> On 10/18/18 7:28 PM, Ming Lei wrote:
>>> On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
On 10/18/18 7:18 AM, Ming Lei wrote:
> Now we only check if DMA IO buffer is aligned
On Thu, Oct 18, 2018 at 07:33:50PM -0600, Jens Axboe wrote:
> On 10/18/18 7:28 PM, Ming Lei wrote:
> > On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
> >> On 10/18/18 7:18 AM, Ming Lei wrote:
> >>> Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
> >>> for
On 10/18/18 7:28 PM, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
>> On 10/18/18 7:18 AM, Ming Lei wrote:
>>> Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
>>> for pass-through request, and it isn't done for normal IO request.
>>>
>>> Given
On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
> On 10/18/18 7:18 AM, Ming Lei wrote:
> > Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
> > for pass-through request, and it isn't done for normal IO request.
> >
> > Given the check has to be done on each bvec,
On 10/18/18 8:43 AM, Christoph Hellwig wrote:
> On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
>> On 10/18/18 7:18 AM, Ming Lei wrote:
>>> Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
>>> for pass-through request, and it isn't done for normal IO request.
>>>
On Thu, Oct 18, 2018 at 08:27:28AM -0600, Jens Axboe wrote:
> On 10/18/18 7:18 AM, Ming Lei wrote:
> > Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
> > for pass-through request, and it isn't done for normal IO request.
> >
> > Given the check has to be done on each bvec,
> diff --git a/block/blk-merge.c b/block/blk-merge.c
> index 42a46744c11b..d2dbd508cb6d 100644
> --- a/block/blk-merge.c
> +++ b/block/blk-merge.c
> @@ -174,6 +174,8 @@ static struct bio *blk_bio_segment_split(struct
> request_queue *q,
> const unsigned max_sectors = get_max_io_size(q,
On 10/18/18 7:18 AM, Ming Lei wrote:
> Now we only check if DMA IO buffer is aligned to queue_dma_alignment()
> for pass-through request, and it isn't done for normal IO request.
>
> Given the check has to be done on each bvec, it isn't efficient to add the
> check in
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