On Fri, Apr 16, 2021 at 05:49:20PM +0800, Baoquan He wrote:
> On 04/16/21 at 09:00am, Oscar Salvador wrote:
> ...
> > +/*
> > + * alloc_and_dissolve_huge_page - Allocate a new page and dissolve the old
> > one
> > + * @h: struct hstate old page belongs to
> > + * @old_page: Old page to dissolve
On 04/16/21 at 09:00am, Oscar Salvador wrote:
...
> +/*
> + * alloc_and_dissolve_huge_page - Allocate a new page and dissolve the old
> one
> + * @h: struct hstate old page belongs to
> + * @old_page: Old page to dissolve
> + * Returns 0 on success, otherwise negated error.
> + */
> +static int
alloc_contig_range will fail if it ever sees a HugeTLB page within the
range we are trying to allocate, even when that page is free and can be
easily reallocated.
This has proved to be problematic for some users of alloc_contic_range,
e.g: CMA and virtio-mem, where those would fail the call even wh
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