Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

On Mon, Dec 21, 2015 at 03:26:27AM +0200, Laurent Pinchart wrote: > On Friday 18 December 2015 20:20:56 Robin Murphy wrote: > > On 18/12/15 18:55, Doug Anderson wrote: > > > 2. We still have the same problem that we're taking away all the > > > contiguous memory that other users may want. I've got

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hi Robin, On Friday 18 December 2015 20:20:56 Robin Murphy wrote: > On 18/12/15 18:55, Doug Anderson wrote: > > On Fri, Dec 18, 2015 at 4:41 AM, Robin Murphy wrote: > >> On 17/12/15 22:31, Doug Anderson wrote: > >>> On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: > The __iommu_alloc

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hi Tomasz, On Friday 18 December 2015 15:05:45 Tomasz Figa wrote: > On Fri, Dec 18, 2015 at 7:31 AM, Doug Anderson wrote: > > On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: > >> The __iommu_alloc_buffer() is expected to be called to allocate pretty > >> sizeable buffers. Upon simple te

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hi, On Fri, Dec 18, 2015 at 12:20 PM, Robin Murphy wrote: > Hmm, I'm no mm expert, but from a look at the flags in gfp.h perhaps instead > of just __GFP_NORETRY we should go all the way to clearing __GFP_RECLAIM for > the opportunistic calls so they really fail fast? Ah, interesting. Hrmm, I th

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

On 18/12/15 18:55, Doug Anderson wrote: Robin, On Fri, Dec 18, 2015 at 4:41 AM, Robin Murphy wrote: Hi Doug, On 17/12/15 22:31, Doug Anderson wrote: Hi, On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: The __iommu_alloc_buffer() is expected to be called to allocate pretty size

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Robin, On Fri, Dec 18, 2015 at 4:41 AM, Robin Murphy wrote: > Hi Doug, > > > On 17/12/15 22:31, Doug Anderson wrote: >> >> Hi, >> >> On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson >> wrote: >>> >>> The __iommu_alloc_buffer() is expected to be called to allocate pretty >>> sizeable buffers.

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hello, On 2015-12-18 13:41, Robin Murphy wrote: Hi Doug, On 17/12/15 22:31, Doug Anderson wrote: Hi, On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: The __iommu_alloc_buffer() is expected to be called to allocate pretty sizeable buffers. Upon simple tests of video I saw it trying

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hi Doug, On 17/12/15 22:31, Doug Anderson wrote: Hi, On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: The __iommu_alloc_buffer() is expected to be called to allocate pretty sizeable buffers. Upon simple tests of video I saw it trying to allocate 4,194,304 bytes. The function tries

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

On Fri, Dec 18, 2015 at 7:31 AM, Doug Anderson wrote: > Hi, > > On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson > wrote: >> The __iommu_alloc_buffer() is expected to be called to allocate pretty >> sizeable buffers. Upon simple tests of video I saw it trying to >> allocate 4,194,304 bytes. T

Re: [PATCH] ARM: dma-mapping: Just allocate one chunk at a time

Hi, On Thu, Dec 17, 2015 at 12:30 PM, Douglas Anderson wrote: > The __iommu_alloc_buffer() is expected to be called to allocate pretty > sizeable buffers. Upon simple tests of video I saw it trying to > allocate 4,194,304 bytes. The function tries to be efficient about this > by starting out al

[PATCH] ARM: dma-mapping: Just allocate one chunk at a time

The __iommu_alloc_buffer() is expected to be called to allocate pretty sizeable buffers. Upon simple tests of video I saw it trying to allocate 4,194,304 bytes. The function tries to be efficient about this by starting out allocating large chunks and then moving to smaller and smaller chunk sizes