From: "Matthew Wilcox (Oracle)" <wi...@infradead.org> Add a mempolicy parameter to filemap_alloc_folio() to enable NUMA-aware page cache allocations. This will be used by upcoming changes to support NUMA policies in guest-memfd, where guest_memory needs to be allocated according to NUMA policy specified by the VMM.
All existing users pass NULL maintaining current behavior. Reviewed-by: Pankaj Gupta <pankaj.gu...@amd.com> Reviewed-by: Vlastimil Babka <vba...@suse.cz> Signed-off-by: Matthew Wilcox (Oracle) <wi...@infradead.org> Signed-off-by: Shivank Garg <shiva...@amd.com> --- Changes in V2: - fix checkpatch warnings. - touch up commit description and fix code alignments to make it more readable. V1: https://lore.kernel.org/all/20250620143502.3055777-1-wi...@infradead.org fs/bcachefs/fs-io-buffered.c | 2 +- fs/btrfs/compression.c | 4 ++-- fs/btrfs/verity.c | 2 +- fs/erofs/zdata.c | 2 +- fs/f2fs/compress.c | 2 +- include/linux/pagemap.h | 8 +++++--- mm/filemap.c | 14 +++++++++----- mm/readahead.c | 2 +- 8 files changed, 21 insertions(+), 15 deletions(-) diff --git a/fs/bcachefs/fs-io-buffered.c b/fs/bcachefs/fs-io-buffered.c index 66bacdd49f78..392344232b16 100644 --- a/fs/bcachefs/fs-io-buffered.c +++ b/fs/bcachefs/fs-io-buffered.c @@ -124,7 +124,7 @@ static int readpage_bio_extend(struct btree_trans *trans, if (folio && !xa_is_value(folio)) break; - folio = filemap_alloc_folio(readahead_gfp_mask(iter->mapping), order); + folio = filemap_alloc_folio(readahead_gfp_mask(iter->mapping), order, NULL); if (!folio) break; diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 48d07939fee4..a0808c8f897f 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -474,8 +474,8 @@ static noinline int add_ra_bio_pages(struct inode *inode, continue; } - folio = filemap_alloc_folio(mapping_gfp_constraint(mapping, - ~__GFP_FS), 0); + folio = filemap_alloc_folio(mapping_gfp_constraint(mapping, ~__GFP_FS), + 0, NULL); if (!folio) break; diff --git a/fs/btrfs/verity.c b/fs/btrfs/verity.c index b7a96a005487..c43a789ba6d2 100644 --- a/fs/btrfs/verity.c +++ b/fs/btrfs/verity.c @@ -742,7 +742,7 @@ static struct page *btrfs_read_merkle_tree_page(struct inode *inode, } folio = filemap_alloc_folio(mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS), - 0); + 0, NULL); if (!folio) return ERR_PTR(-ENOMEM); diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index fe8071844724..00e9160a0d24 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -562,7 +562,7 @@ static void z_erofs_bind_cache(struct z_erofs_frontend *fe) * Allocate a managed folio for cached I/O, or it may be * then filled with a file-backed folio for in-place I/O */ - newfolio = filemap_alloc_folio(gfp, 0); + newfolio = filemap_alloc_folio(gfp, 0, NULL); if (!newfolio) continue; newfolio->private = Z_EROFS_PREALLOCATED_FOLIO; diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index b3c1df93a163..7ef937dd7624 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1942,7 +1942,7 @@ void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, return; } - cfolio = filemap_alloc_folio(__GFP_NOWARN | __GFP_IO, 0); + cfolio = filemap_alloc_folio(__GFP_NOWARN | __GFP_IO, 0, NULL); if (!cfolio) return; diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index e63fbfbd5b0f..78ea357d2077 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -646,9 +646,11 @@ static inline void *detach_page_private(struct page *page) } #ifdef CONFIG_NUMA -struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order); +struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order, + struct mempolicy *policy); #else -static inline struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order) +static inline struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order, + struct mempolicy *policy) { return folio_alloc_noprof(gfp, order); } @@ -659,7 +661,7 @@ static inline struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int o static inline struct page *__page_cache_alloc(gfp_t gfp) { - return &filemap_alloc_folio(gfp, 0)->page; + return &filemap_alloc_folio(gfp, 0, NULL)->page; } static inline gfp_t readahead_gfp_mask(struct address_space *x) diff --git a/mm/filemap.c b/mm/filemap.c index bada249b9fb7..a30cd4dd085a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -989,11 +989,16 @@ int filemap_add_folio(struct address_space *mapping, struct folio *folio, EXPORT_SYMBOL_GPL(filemap_add_folio); #ifdef CONFIG_NUMA -struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order) +struct folio *filemap_alloc_folio_noprof(gfp_t gfp, unsigned int order, + struct mempolicy *policy) { int n; struct folio *folio; + if (policy) + return folio_alloc_mpol_noprof(gfp, order, policy, + NO_INTERLEAVE_INDEX, numa_node_id()); + if (cpuset_do_page_mem_spread()) { unsigned int cpuset_mems_cookie; do { @@ -1977,7 +1982,7 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, err = -ENOMEM; if (order > min_order) alloc_gfp |= __GFP_NORETRY | __GFP_NOWARN; - folio = filemap_alloc_folio(alloc_gfp, order); + folio = filemap_alloc_folio(alloc_gfp, order, NULL); if (!folio) continue; @@ -2516,7 +2521,7 @@ static int filemap_create_folio(struct kiocb *iocb, struct folio_batch *fbatch) if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_WAITQ)) return -EAGAIN; - folio = filemap_alloc_folio(mapping_gfp_mask(mapping), min_order); + folio = filemap_alloc_folio(mapping_gfp_mask(mapping), min_order, NULL); if (!folio) return -ENOMEM; if (iocb->ki_flags & IOCB_DONTCACHE) @@ -3853,8 +3858,7 @@ static struct folio *do_read_cache_folio(struct address_space *mapping, repeat: folio = filemap_get_folio(mapping, index); if (IS_ERR(folio)) { - folio = filemap_alloc_folio(gfp, - mapping_min_folio_order(mapping)); + folio = filemap_alloc_folio(gfp, mapping_min_folio_order(mapping), NULL); if (!folio) return ERR_PTR(-ENOMEM); index = mapping_align_index(mapping, index); diff --git a/mm/readahead.c b/mm/readahead.c index 20d36d6b055e..0b2aec0231e6 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -183,7 +183,7 @@ static struct folio *ractl_alloc_folio(struct readahead_control *ractl, { struct folio *folio; - folio = filemap_alloc_folio(gfp_mask, order); + folio = filemap_alloc_folio(gfp_mask, order, NULL); if (folio && ractl->dropbehind) __folio_set_dropbehind(folio); -- 2.43.0 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
