linux-kernel - Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm

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Message-ID: <20141029073752.72e5f1c1@jbarnes-hsw>
Date:	Wed, 29 Oct 2014 07:37:52 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Oded Gabbay <oded.gabbay@....com>
Cc:	Joerg Roedel <jroedel@...e.de>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mm: export find_extend_vma and handle_mm_fault for
 driver use

Cool, thanks a lot, Oded.  I guess my compiler did a good job making
sure there were no bugs. :)

Jesse

On Wed, 29 Oct 2014 11:33:38 +0200
Oded Gabbay <oded.gabbay@....com> wrote:

> Hi Joerg and Jesse,
> 
> I tested our amdkfd driver with your patches applied (kernel 3.17.1).
> I run OpenCL tests, Aparapi/Sumatra (Java) and OpenMP
> 
> All tests passed and I didn't see any kernel error messages.
> 
> So:
> 
> Tested-by: Oded Gabbay <oded.gabbay@....com>
> 
> Oded
> 
> On 10/27/2014 05:35 PM, Jesse Barnes wrote:
> 
> Thanks, I have no way of testing this, but I'm hopeful. :)
> 
> Jesse
> 
> On Mon, 27 Oct 2014 17:15:45 +0200
> Oded Gabbay <oded.gabbay@....com> wrote:
> 
> > Sure, no problem
> >
> >       Oded
> >
> > On 10/27/2014 05:13 PM, Joerg Roedel wrote:
> >
> > Hi Oded,
> >
> > can you please test these patches with the KFD driver and make sure
> > nothing breaks for you? I really like this improvement and it would be
> > great to send it upstream for v3.19.
> >
> > Thanks,
> >
> > 	Joerg
> >
> > On Fri, Oct 24, 2014 at 12:34:30PM -0700, Jesse Barnes wrote:
> >
> >> This lets drivers like the AMD IOMMUv2 driver handle faults a bit more
> >> simply, rather than doing tricks with page refs and get_user_pages().
> >>
> >> Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
> >> ---
> >>    mm/memory.c | 1 +
> >>    mm/mmap.c   | 2 ++
> >>    2 files changed, 3 insertions(+)
> >>
> >> diff --git a/mm/memory.c b/mm/memory.c
> >> index 1cc6bfb..969ff0c 100644
> >> --- a/mm/memory.c
> >> +++ b/mm/memory.c
> >> @@ -3378,6 +3378,7 @@ int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma,
> >>    
> >>    	return ret;
> >>    }
> >> +EXPORT_SYMBOL_GPL(handle_mm_fault);
> >>    
> >>    #ifndef __PAGETABLE_PUD_FOLDED
> >>    /*
> >> diff --git a/mm/mmap.c b/mm/mmap.c
> >> index 7f85520..2ee7971 100644
> >> --- a/mm/mmap.c
> >> +++ b/mm/mmap.c
> >> @@ -2359,6 +2359,8 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr)
> >>    }
> >>    #endif
> >>    
> >> +EXPORT_SYMBOL_GPL(find_extend_vma);
> >> +
> >>    /*
> >>     * Ok - we have the memory areas we should free on the vma list,
> >>     * so release them, and do the vma updates.
> >> -- 
> >> 1.9.1
> 
> 
> 


-- 
Jesse Barnes, Intel Open Source Technology Center
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