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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jun 2025 09:52:58.8300 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e41f6f37-eadd-4cf8-4f16-08ddb23bbc56 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF00017093.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9729 X-Rspamd-Queue-Id: DB05E20009 X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: fxs8re36d57u5i8pm5bqfmcsurq1fe8q X-HE-Tag: 1750672384-707964 X-HE-Meta: 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 5m0PDw6V ylYxVRB702XcTDK4ZCicrYHB4nrwnhFqaUYmuYSS73VAN9sUUCdtixrGAgboOAaGW9GGaZNVnMVHZc4VQ61bi7dtPDg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Matthew Wilcox (Oracle)" Extend __filemap_get_folio() to support NUMA memory policies by renaming the implementation to __filemap_get_folio_mpol() and adding a mempolicy parameter. The original function becomes a static inline wrapper that passes NULL for the mempolicy. This infrastructure will enable future support for NUMA-aware page cache allocations in guest_memfd memory backend KVM guests. Reviewed-by: Pankaj Gupta Reviewed-by: Vlastimil Babka Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Shivank Garg --- 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/20250620143502.3055777-2-willy@infradead.org include/linux/pagemap.h | 10 ++++++++-- mm/filemap.c | 11 ++++++----- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 78ea357d2077..981ff97b4445 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -747,11 +747,17 @@ static inline fgf_t fgf_set_order(size_t size) } void *filemap_get_entry(struct address_space *mapping, pgoff_t index); -struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, - fgf_t fgp_flags, gfp_t gfp); +struct folio *__filemap_get_folio_mpol(struct address_space *mapping, + pgoff_t index, fgf_t fgf_flags, gfp_t gfp, struct mempolicy *policy); struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, fgf_t fgp_flags, gfp_t gfp); +static inline struct folio *__filemap_get_folio(struct address_space *mapping, + pgoff_t index, fgf_t fgf_flags, gfp_t gfp) +{ + return __filemap_get_folio_mpol(mapping, index, fgf_flags, gfp, NULL); +} + /** * filemap_get_folio - Find and get a folio. * @mapping: The address_space to search. diff --git a/mm/filemap.c b/mm/filemap.c index a30cd4dd085a..ec7de38c17c1 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1896,11 +1896,12 @@ void *filemap_get_entry(struct address_space *mapping, pgoff_t index) } /** - * __filemap_get_folio - Find and get a reference to a folio. + * __filemap_get_folio_mpol - Find and get a reference to a folio. * @mapping: The address_space to search. * @index: The page index. * @fgp_flags: %FGP flags modify how the folio is returned. * @gfp: Memory allocation flags to use if %FGP_CREAT is specified. + * @policy: NUMA memory allocation policy to follow. * * Looks up the page cache entry at @mapping & @index. * @@ -1911,8 +1912,8 @@ void *filemap_get_entry(struct address_space *mapping, pgoff_t index) * * Return: The found folio or an ERR_PTR() otherwise. */ -struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, - fgf_t fgp_flags, gfp_t gfp) +struct folio *__filemap_get_folio_mpol(struct address_space *mapping, + pgoff_t index, fgf_t fgp_flags, gfp_t gfp, struct mempolicy *policy) { struct folio *folio; @@ -1982,7 +1983,7 @@ 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, NULL); + folio = filemap_alloc_folio(alloc_gfp, order, policy); if (!folio) continue; @@ -2029,7 +2030,7 @@ struct folio *__filemap_get_folio(struct address_space *mapping, pgoff_t index, folio_clear_dropbehind(folio); return folio; } -EXPORT_SYMBOL(__filemap_get_folio); +EXPORT_SYMBOL(__filemap_get_folio_mpol); static inline struct folio *find_get_entry(struct xa_state *xas, pgoff_t max, xa_mark_t mark) -- 2.43.0