Re: [PATCH 0/4] IB: decrease large contigous allocation

[Jan Dakinevich]

On Tue, 18 Sep 2018 08:46:23 -0600
Jason Gunthorpe <jgg@xxxxxxxx> wrote:

> On Tue, Sep 18, 2018 at 04:03:42PM +0300, Jan Dakinevich wrote:
> > The size of mlx4_ib_device became too large to be allocated as
> > whole contigous block of memory. Currently it takes about 55K. On
> > architecture with 4K page it means 3rd order.
> > 
> > This patch series makes an attempt to split mlx4_ib_device into
> > several parts and allocate them with less expensive kvzalloc
> 
> Why split it up? Any reason not to just allocate the whole thing with
> kvzalloc?
> 

To allocate whole ib_device with kvmalloc I will need replace kzalloc()
by kvzalloc() in ib_alloc_device() and then review allocation, to make
sure that no one uses this memory for DMA.

Although, I could introduce new ib_*alloc_device allocator for these
needs...

> Jason



-- 
Best regards
Jan Dakinevich