On 8/8/25 14:11, Pankaj Raghav (Samsung) wrote:
From: Pankaj Raghav <p.raghav@xxxxxxxxxxx> The callers of mm_get_huge_zero_folio() have access to a mm struct and the lifetime of the huge_zero_folio is tied to the lifetime of the mm struct. largest_zero_folio() will give access to huge_zero_folio when PERSISTENT_HUGE_ZERO_FOLIO config option is enabled for callers that do not want to tie the lifetime to a mm struct. This is very useful for filesystem and block layers where the request completions can be async and there is no guarantee on the mm struct lifetime. This function will return a ZERO_PAGE folio if PERSISTENT_HUGE_ZERO_FOLIO is disabled or if we failed to allocate a huge_zero_folio during early init. Co-developed-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx> Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx> --- include/linux/huge_mm.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich
