Re: [PATCH v4] mm: introduce xvmalloc() et al and use for grant table allocations

[Julien Grall <julien@xxxxxxx>]

Hi Jan,

On 01/08/2024 07:30, Jan Beulich wrote:
> All of the array allocations in grant_table_init() can exceed a page's
> worth of memory, which xmalloc()-based interfaces aren't really suitable
> for after boot. We also don't need any of these allocations to be
> physically contiguous. Introduce interfaces dynamically switching
> between xmalloc() et al and vmalloc() et al, based on requested size,
> and use them instead.
>
> All the wrappers in the new header are cloned mostly verbatim from
> xmalloc.h, with the sole adjustment to switch unsigned long to size_t
> for sizes and to unsigned int for alignments, and with the cloning of
> x[mz]alloc_bytes() avoided. The exception is xvmemdup(), where the
> const related comment on xmemdup() is actually addressed and hence
> dropped.
>
> While adjusting grant_table_destroy() also move ahead the clearing of
> the struct domain field.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall