Re: [PATCH v14 038/138] mm/memcg: Add folio_memcg() and related functions

David Howells
2021-08-10T20:18:07Z

Matthew Wilcox (Oracle) <willy@infradead.org> wrote:

> memcg information is only stored in the head page, so the memcg
> subsystem needs to assure that all accesses are to the head page.
> The first step is converting page_memcg() to folio_memcg().
>
> The callers of page_memcg() and PageMemcgKmem() are not yet ready to be
> converted to use folios, so retain them as wrappers around folio_memcg()
> and folio_memcg_kmem(). They will be converted in a later patch set.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Reviewed-by: Christoph Hellwig <hch@lst.de>

Reviewed-by: David Howells <dhowells@redhat.com>