Re: [Potential Spoof] [PATCH] mm: hugetlb: fix per-node size calculation for hugetlb_cma

[Roman Gushchin]

On Mon, Mar 23, 2020 at 03:14:11PM -0700, Roman Gushchin wrote:
> Aslan found a bug in the per-node hugetlb_cma area size calculation:
> the total remaining size should cap the per-node area size instead
> of be the minimal possible allocation.
> 
> Without the fix:
> [    0.004136] hugetlb_cma: reserve 2048 MiB, up to 1024 MiB per node
> [    0.004138] cma: Reserved 2048 MiB at 0x0000000180000000
> [    0.004139] hugetlb_cma: reserved 2048 MiB on node 0
> 
> With the fix:
> [    0.006780] hugetlb_cma: reserve 2048 MiB, up to 1024 MiB per node
> [    0.006786] cma: Reserved 1024 MiB at 0x00000001c0000000
> [    0.006787] hugetlb_cma: reserved 1024 MiB on node 0
> [    0.006788] cma: Reserved 1024 MiB at 0x00000003c0000000
> [    0.006789] hugetlb_cma: reserved 1024 MiB on node 1
> 
> Reported-by: Aslan Barkirov <aslan@xxxxxx>
> Signed-off-by: Roman Gushchin <guro@xxxxxx>

I'm deeply sorry, I've made a typo in Aslan's name.

v2 fixes this.

Thanks!