[LTP] [PATCH] mtest06/mmap1: Further limit distant mmap size

[Jan Stancek]

On Wed, May 19, 2021 at 3:22 PM Thadeu Lima de Souza Cascardo
<cascardo@canonical.com> wrote:
>
> Though on recent kernels (starting with 5.2, commit
> 8c7829b04c523cdc732cb77f59f03320e09f3386 ("mm: fix false-positive
> OVERCOMMIT_GUESS failures"), overcommit accounting allows for allocating up
> to MemTotal memory, older kernels have a much more complicated overcommit
> guess accounting.
>
> That leads to mmap failing on small enough systems:
>
> mmap1.c:205: TBROK: mmap((nil),2088370176,3,34,-1,0) failed: ENOMEM (12)
>
> Allocating only half of the total memory would generally work on test
> systems.
>
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>

Thanks for patch.

Acked-by: Jan Stancek <jstancek@redhat.com>