Re: [PATCH] dma-buf: heaps: Set allocation limit for system heap
From: Sumit Semwal
Date: Tue Aug 10 2021 - 04:26:35 EST
Apologies for the delay in responding;
On Wed, 4 Aug 2021 at 03:09, Hridya Valsaraju <hridya@xxxxxxxxxx> wrote:
> On Mon, Aug 2, 2021 at 7:18 PM John Stultz <john.stultz@xxxxxxxxxx> wrote:
> > On Thu, Jul 22, 2021 at 12:07 PM Hridya Valsaraju <hridya@xxxxxxxxxx> wrote:
> > > This patch limits the size of total memory that can be requested in a
> > > single allocation from the system heap. This would prevent a
> > > buggy/malicious client from depleting system memory by requesting for an
> > > extremely large allocation which might destabilize the system.
> > >
> > > The limit is set to half the size of the device's total RAM which is the
> > > same as what was set by the deprecated ION system heap.
> > >
> > > Signed-off-by: Hridya Valsaraju <hridya@xxxxxxxxxx>
> > Seems sane to me, unless folks have better suggestions for allocation limits.
> > Reviewed-by: John Stultz <john.stultz@xxxxxxxxxx>
> Thank you for taking a look John!
Looks good to me; I will apply it to drm-misc today.
> > thanks
> > -john
Thanks and regards,
Sumit Semwal (he / him)
Tech Lead - LCG, Vertical Technologies
Linaro.org │ Open source software for ARM SoCs