Hi,
On Tue, Sep 28, 2021 at 06:50:57PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> mem=[X][G|M] is broken on NXP i.MX ARM64 platform, there is cases that
> even type.cnt is 1, but total_size is not 0 because regions are merged
> into 1. So only check 'cnt' is not enough, total_size also needs to be
> taked into consideration, othersize bootargs 'mem=[X][G|B]' not work
> anymore.
I believe this is issue is not specific to i.MX but rather this could
happen on any arm64 platform. Can you please update the changelog?
> Fixes: e888fa7bb882 ("memblock: Check memory add/cap ordering")
> Cc: Mike Rapoport <rppt@xxxxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Cc: David Hildenbrand <david@xxxxxxxxxx>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
> mm/memblock.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/memblock.c b/mm/memblock.c
> index 184dcd2e5d99..ab67b82a9cce 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -1687,7 +1687,7 @@ void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size)
> if (!size)
> return;
>
> - if (memblock.memory.cnt <= 1) {
> + if (memblock_memory->cnt <= 1 && !memblock_memory->total_size) {
The test for non-zero total size shold be sufficient here.
> pr_warn("%s: No memory registered yet\n", __func__);
> return;
> }
> --
> 2.30.0
>
--
Sincerely yours,
Mike.
