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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id af79cd13be357-930b545e47bsm957792285a.35.2026.07.20.12.34.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jul 2026 12:34:45 -0700 (PDT) From: Gregory Price To: linux-mm@kvack.org Cc: Zhigang.Luo@amd.com, arun.george@samsung.com, balbirs@nvidia.com, brendan.jackman@linux.dev, yuzenghui@huawei.com, apopple@nvidia.com, alucerop@amd.com, matthew.brost@intel.com, akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, corbet@lwn.net, skhan@linuxfoundation.org, gregkh@linuxfoundation.org, rafael@kernel.org, dakr@kernel.org, djbw@kernel.org, vishal.l.verma@intel.com, dave.jiang@intel.com, alison.schofield@intel.com, osandov@osandov.com, jannh@google.com, pfalcato@suse.de, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, pbonzini@redhat.com, osalvador@suse.de, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, kasong@tencent.com, qi.zheng@linux.dev, shakeel.butt@linux.dev, baohua@kernel.org, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, yury.norov@gmail.com, linux@rasmusvillemoes.dk, longman@redhat.com, ridong.chen@linux.dev, tj@kernel.org, mkoutny@suse.com, sj@kernel.org, jgg@ziepe.ca, jhubbard@nvidia.com, peterx@redhat.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, lance.yang@linux.dev, usama.arif@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, roman.gushchin@linux.dev, muchun.song@linux.dev, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, driver-core@lists.linux.dev, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-debuggers@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, cgroups@vger.kernel.org, damon@lists.linux.dev, linux-kselftest@vger.kernel.org, kernel-team@meta.com Subject: [PATCH v5 03/36] mm/page_alloc: let the bulk and folio allocators carry alloc_flags Date: Mon, 20 Jul 2026 15:33:57 -0400 Message-ID: <20260720193431.3841992-4-gourry@gourry.net> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260720193431.3841992-1-gourry@gourry.net> References: <20260720193431.3841992-1-gourry@gourry.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 8FD2B180008 X-Stat-Signature: 8ciq71tubgnzrbyarrep6hhf3z3btf8d X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1784576087-370934 X-HE-Meta: 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 QJX9wx1C jf+P8ERncQUUDSM8+YMneuXA6SKXboiCU3yNyCLVndWZLaA5QXaPzQXj6kEdTz1emhFfKALqUDf35h5k3Go+Pb8baFfIbFtu9wOQQjGnypHhjOrGMofAw1jpwRFEEVVITxjKHnt6r5Ah4W23FYoG7ECcYxzYZGPaUXthjo/r6NzVDWnrxgvCGScL0glr+onhZj/sakrJUafbr7swLxQgN1BlSGOQb+B+IMyFu4OCRpWDbYcSLeTn+Hje2t6SXZwHPwYNNhEuNVh/G7N4weZFzviGy3JiwaOwVYyngm+iqKj1VlV493OlZIg2kMZttFRbw7ARc/FVswSaEvIzQ4j65L+s+ptyLVt1UcmSQpEt3jPLcTyDb6GdN4OfuBpuTXrBUlD4ZZsk1+ayk9j87g8zl4brhjmnUwWWFvWVotuDbfZ2nDLw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: __alloc_pages_noprof() takes an explicit alloc_flags, but the bulk and folio entry points do not, so callers cannot select allocator behaviour (e.g. an alternate zonelist) through them. Thread alloc_flags through both, matching __alloc_pages_noprof(), and keep the flag-carrying primitives mm-internal (page_alloc.h) so the public gfp.h wrappers stay flag-free: - add __alloc_pages_bulk_noprof(gfp, alloc_flags, ...) in page_alloc.h alloc_pages_bulk_noprof() becomes a wrapper passing ALLOC_DEFAULT - give __folio_alloc_noprof() an alloc_flags parameter and moves __folio_alloc_node_noprof() moves into page_alloc.c __folio_alloc_noprof() is no longer exported No functional change: every caller passes ALLOC_DEFAULT. Signed-off-by: Gregory Price --- include/linux/gfp.h | 13 +------------ mm/khugepaged.c | 2 +- mm/migrate.c | 2 +- mm/page_alloc.c | 46 ++++++++++++++++++++++++++++++--------------- mm/page_alloc.h | 8 ++++++++ 5 files changed, 42 insertions(+), 29 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 872bc53f32ec8..a327e58c313f8 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -204,10 +204,6 @@ static inline void arch_free_page(struct page *page, int order) { } static inline void arch_alloc_page(struct page *page, int order) { } #endif -struct folio *__folio_alloc_noprof(gfp_t gfp, unsigned int order, int preferred_nid, - nodemask_t *nodemask); -#define __folio_alloc(...) alloc_hooks(__folio_alloc_noprof(__VA_ARGS__)) - unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, nodemask_t *nodemask, int nr_pages, struct page **page_array); @@ -252,14 +248,7 @@ static inline void warn_if_node_offline(int this_node, gfp_t gfp_mask) dump_stack(); } -static inline -struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid) -{ - warn_if_node_offline(nid, gfp); - - return __folio_alloc_noprof(gfp, order, nid, NULL); -} - +struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid); #define __folio_alloc_node(...) alloc_hooks(__folio_alloc_node_noprof(__VA_ARGS__)) /* diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 27e8f3077e80f..89ce6bcbc376b 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1243,7 +1243,7 @@ static enum scan_result alloc_charge_folio(struct folio **foliop, struct mm_stru int node = collapse_find_target_node(cc); struct folio *folio; - folio = __folio_alloc(gfp, order, node, &cc->alloc_nmask); + folio = __folio_alloc(gfp, order, node, &cc->alloc_nmask, ALLOC_DEFAULT); if (!folio) { *foliop = NULL; if (is_pmd_order(order)) diff --git a/mm/migrate.c b/mm/migrate.c index 60355be9f652c..a8a86141dbb54 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2231,7 +2231,7 @@ struct folio *alloc_migration_target(struct folio *src, unsigned long private) if (is_highmem_idx(zidx) || zidx == ZONE_MOVABLE) gfp_mask |= __GFP_HIGHMEM; - return __folio_alloc(gfp_mask, order, nid, mtc->nmask); + return __folio_alloc(gfp_mask, order, nid, mtc->nmask, ALLOC_DEFAULT); } #ifdef CONFIG_NUMA_MIGRATION diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 4c1ef84c02a3d..aa35bbe5d4c3e 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5103,8 +5103,8 @@ static inline bool prepare_alloc_pages(gfp_t gfp_mask, unsigned int order, * @page_array were set to %NULL on entry, the slots from 0 to the return value * - 1 will be filled. */ -unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, - nodemask_t *nodemask, int nr_pages, +unsigned long __alloc_pages_bulk_noprof(gfp_t gfp, unsigned int alloc_flags, + int preferred_nid, nodemask_t *nodemask, int nr_pages, struct page **page_array) { struct page *page; @@ -5112,8 +5112,8 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, struct zoneref *z; struct per_cpu_pages *pcp; struct list_head *pcp_list; - struct alloc_context ac; - unsigned int alloc_flags = ALLOC_WMARK_LOW; + struct alloc_context ac = { .alloc_flags = alloc_flags }; + unsigned int fastpath_alloc_flags = alloc_flags | ALLOC_WMARK_LOW; int nr_populated = 0, nr_account = 0; /* @@ -5153,7 +5153,7 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, /* May set ALLOC_NOFRAGMENT, fragmentation will return 1 page. */ gfp &= gfp_allowed_mask; - if (!prepare_alloc_pages(gfp, 0, preferred_nid, nodemask, &ac, &gfp, &alloc_flags)) + if (!prepare_alloc_pages(gfp, 0, preferred_nid, nodemask, &ac, &gfp, &fastpath_alloc_flags)) goto out; /* Find an allowed local zone that meets the low watermark. */ @@ -5161,7 +5161,7 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, for_next_zone_zonelist_nodemask(zone, z, ac.highest_zoneidx, ac.nodemask) { unsigned long mark; - if (cpusets_enabled() && (alloc_flags & ALLOC_CPUSET) && + if (cpusets_enabled() && (fastpath_alloc_flags & ALLOC_CPUSET) && !__cpuset_zone_allowed(zone, gfp)) { continue; } @@ -5171,16 +5171,17 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, goto failed; } - cond_accept_memory(zone, 0, alloc_flags); + cond_accept_memory(zone, 0, fastpath_alloc_flags); retry_this_zone: - mark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK) + nr_pages - nr_populated; + mark = wmark_pages(zone, fastpath_alloc_flags & ALLOC_WMARK_MASK) + + nr_pages - nr_populated; if (zone_watermark_fast(zone, 0, mark, zonelist_zone_idx(ac.preferred_zoneref), - alloc_flags, gfp)) { + fastpath_alloc_flags, gfp)) { break; } - if (cond_accept_memory(zone, 0, alloc_flags)) + if (cond_accept_memory(zone, 0, fastpath_alloc_flags)) goto retry_this_zone; /* Try again if zone has deferred pages */ @@ -5212,7 +5213,7 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, continue; } - page = __rmqueue_pcplist(zone, 0, ac.migratetype, alloc_flags, + page = __rmqueue_pcplist(zone, 0, ac.migratetype, fastpath_alloc_flags, pcp, pcp_list); if (unlikely(!page)) { /* Try and allocate at least one page */ @@ -5238,11 +5239,19 @@ unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, return nr_populated; failed: - page = __alloc_pages_noprof(gfp, 0, preferred_nid, nodemask, ALLOC_DEFAULT); + page = __alloc_pages_noprof(gfp, 0, preferred_nid, nodemask, alloc_flags); if (page) page_array[nr_populated++] = page; goto out; } + +unsigned long alloc_pages_bulk_noprof(gfp_t gfp, int preferred_nid, + nodemask_t *nodemask, int nr_pages, + struct page **page_array) +{ + return __alloc_pages_bulk_noprof(gfp, ALLOC_DEFAULT, preferred_nid, + nodemask, nr_pages, page_array); +} EXPORT_SYMBOL_GPL(alloc_pages_bulk_noprof); /* @@ -5433,13 +5442,20 @@ struct page *alloc_pages_node_noprof(int nid, gfp_t gfp_mask, unsigned int order EXPORT_SYMBOL(alloc_pages_node_noprof); struct folio *__folio_alloc_noprof(gfp_t gfp, unsigned int order, int preferred_nid, - nodemask_t *nodemask) + nodemask_t *nodemask, unsigned int alloc_flags) { struct page *page = __alloc_pages_noprof(gfp | __GFP_COMP, order, - preferred_nid, nodemask, ALLOC_DEFAULT); + preferred_nid, nodemask, alloc_flags); return page_rmappable_folio(page); } -EXPORT_SYMBOL(__folio_alloc_noprof); + +struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid) +{ + warn_if_node_offline(nid, gfp); + + return __folio_alloc_noprof(gfp, order, nid, NULL, ALLOC_DEFAULT); +} +EXPORT_SYMBOL(__folio_alloc_node_noprof); /* * Common helper functions. Never use with __GFP_HIGHMEM because the returned diff --git a/mm/page_alloc.h b/mm/page_alloc.h index b9259deddb59d..23fc79ce97b60 100644 --- a/mm/page_alloc.h +++ b/mm/page_alloc.h @@ -258,6 +258,14 @@ struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order, int preferred_n nodemask_t *nodemask, unsigned int alloc_flags); #define __alloc_pages(...) alloc_hooks(__alloc_pages_noprof(__VA_ARGS__)) +struct folio *__folio_alloc_noprof(gfp_t gfp, unsigned int order, int preferred_nid, + nodemask_t *nodemask, unsigned int alloc_flags); +#define __folio_alloc(...) alloc_hooks(__folio_alloc_noprof(__VA_ARGS__)) + +unsigned long __alloc_pages_bulk_noprof(gfp_t gfp, unsigned int alloc_flags, + int preferred_nid, nodemask_t *nodemask, int nr_pages, + struct page **page_array); + extern void zone_pcp_reset(struct zone *zone); extern void zone_pcp_disable(struct zone *zone); extern void zone_pcp_enable(struct zone *zone); -- 2.53.0-Meta