Re: [PATCH] eal: fixes the bug where rte_malloc() fails to allocates memory

[Dmitry Kozlyuk]

2022-06-22 19:03 (UTC+0200), David Marchand:
> On Sat, Jun 18, 2022 at 1:29 PM Dmitry Kozlyuk <dmitry.kozl...@gmail.com> 
> wrote:
> >
> > Hi Fidaullah,
> >
> > Thanks for the fix,
> > Acked-by: Dmitry Kozlyuk <dmitry.kozl...@gmail.com>  
> 
> This seems backport material.
> Dmitry, Anatoly, do you agree? If so I'll mark it when applying.
> 
> As for a Fixes: line, the closer commit touching this part is
> 07dcbfe0101f ("malloc: support multiprocess memory hotplug") but I
> wonder if this bug predates this commit.

I agree and the offending commit seems the right one.
Before that commit the calculation accounted for the header,
with 07dcbfe0101f it was lost:

        align = RTE_MAX(align, MALLOC_ELEM_HEADER_LEN);
        map_len = RTE_ALIGN_CEIL(align + elt_size + MALLOC_ELEM_TRAILER_LEN,
                        pg_sz);