On Fri, Oct 19, 2018 at 10:53:49AM +0800, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 05:22:19PM +0200, Christoph Hellwig wrote:
> > On Thu, Oct 18, 2018 at 08:11:23AM -0700, Matthew Wilcox wrote:
> > > On Thu, Oct 18, 2018 at 04:42:07PM +0200, Christoph Hellwig wrote:
> > > > This all seems quite
On 10/18/18 8:53 PM, Ming Lei wrote:
> On Thu, Oct 18, 2018 at 05:22:19PM +0200, Christoph Hellwig wrote:
>> On Thu, Oct 18, 2018 at 08:11:23AM -0700, Matthew Wilcox wrote:
>>> On Thu, Oct 18, 2018 at 04:42:07PM +0200, Christoph Hellwig wrote:
This all seems quite complicated.
I
On Thu, Oct 18, 2018 at 05:22:19PM +0200, Christoph Hellwig wrote:
> On Thu, Oct 18, 2018 at 08:11:23AM -0700, Matthew Wilcox wrote:
> > On Thu, Oct 18, 2018 at 04:42:07PM +0200, Christoph Hellwig wrote:
> > > This all seems quite complicated.
> > >
> > > I think the interface we'd want is more
On Thu, Oct 18, 2018 at 08:11:23AM -0700, Matthew Wilcox wrote:
> On Thu, Oct 18, 2018 at 04:42:07PM +0200, Christoph Hellwig wrote:
> > This all seems quite complicated.
> >
> > I think the interface we'd want is more one that has a little
> > cache of a single page in the queue, and a little
On Thu, Oct 18, 2018 at 04:42:07PM +0200, Christoph Hellwig wrote:
> This all seems quite complicated.
>
> I think the interface we'd want is more one that has a little
> cache of a single page in the queue, and a little bitmap which
> sub-page size blocks of it are used.
>
> Something like
This all seems quite complicated.
I think the interface we'd want is more one that has a little
cache of a single page in the queue, and a little bitmap which
sub-page size blocks of it are used.
Something like (pseudo code minus locking):
void *blk_alloc_sector_buffer(struct block_device
One big issue is that the allocated buffer from slab has to respect
the queue DMA alignment limit.
This patch supports to create one kmem_cache for less-than PAGE_SIZE
allocation, and makes sure that the allocation is aligned with queue
DMA alignment.
For >= PAGE_SIZE allocation, it should be
