From: Baoquan He <bhe@redhat.com> To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, akpm@linux-foundation.org, rppt@kernel.org, Baoquan He <bhe@redhat.com> Subject: [PATCH v2 3/6] mm/mm_init.c: add new function calc_nr_all_pages() Date: Mon, 25 Mar 2024 22:56:43 +0800 [thread overview] Message-ID: <20240325145646.1044760-4-bhe@redhat.com> (raw) In-Reply-To: <20240325145646.1044760-1-bhe@redhat.com> This is a preparation to calculate nr_kernel_pages and nr_all_pages, both of which will be used later in alloc_large_system_hash(). nr_all_pages counts up all free but not reserved memory in memblock allocator, including HIGHMEM memory. While nr_kernel_pages counts up all free but not reserved low memory in memblock allocator, excluding HIGHMEM memory. Signed-off-by: Baoquan He <bhe@redhat.com> --- mm/mm_init.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/mm/mm_init.c b/mm/mm_init.c index 153fb2dc666f..c57a7fc97a16 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1264,6 +1264,30 @@ static void __init reset_memoryless_node_totalpages(struct pglist_data *pgdat) pr_debug("On node %d totalpages: 0\n", pgdat->node_id); } +static void __init calc_nr_kernel_pages(void) +{ + unsigned long start_pfn, end_pfn; + phys_addr_t start_addr, end_addr; + u64 u; +#ifdef CONFIG_HIGHMEM + unsigned long high_zone_low = arch_zone_lowest_possible_pfn[ZONE_HIGHMEM]; +#endif + + for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start_addr, &end_addr, NULL) { + start_pfn = PFN_UP(start_addr); + end_pfn = PFN_DOWN(end_addr); + + if (start_pfn < end_pfn) { + nr_all_pages += end_pfn - start_pfn; +#ifdef CONFIG_HIGHMEM + start_pfn = clamp(start_pfn, 0, high_zone_low); + end_pfn = clamp(end_pfn, 0, high_zone_low); +#endif + nr_kernel_pages += end_pfn - start_pfn; + } + } +} + static void __init calculate_node_totalpages(struct pglist_data *pgdat, unsigned long node_start_pfn, unsigned long node_end_pfn) -- 2.41.0
WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com> To: linux-mm@kvack.org Cc: Baoquan He <bhe@redhat.com>, x86@kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org, rppt@kernel.org Subject: [PATCH v2 3/6] mm/mm_init.c: add new function calc_nr_all_pages() Date: Mon, 25 Mar 2024 22:56:43 +0800 [thread overview] Message-ID: <20240325145646.1044760-4-bhe@redhat.com> (raw) In-Reply-To: <20240325145646.1044760-1-bhe@redhat.com> This is a preparation to calculate nr_kernel_pages and nr_all_pages, both of which will be used later in alloc_large_system_hash(). nr_all_pages counts up all free but not reserved memory in memblock allocator, including HIGHMEM memory. While nr_kernel_pages counts up all free but not reserved low memory in memblock allocator, excluding HIGHMEM memory. Signed-off-by: Baoquan He <bhe@redhat.com> --- mm/mm_init.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/mm/mm_init.c b/mm/mm_init.c index 153fb2dc666f..c57a7fc97a16 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1264,6 +1264,30 @@ static void __init reset_memoryless_node_totalpages(struct pglist_data *pgdat) pr_debug("On node %d totalpages: 0\n", pgdat->node_id); } +static void __init calc_nr_kernel_pages(void) +{ + unsigned long start_pfn, end_pfn; + phys_addr_t start_addr, end_addr; + u64 u; +#ifdef CONFIG_HIGHMEM + unsigned long high_zone_low = arch_zone_lowest_possible_pfn[ZONE_HIGHMEM]; +#endif + + for_each_free_mem_range(u, NUMA_NO_NODE, MEMBLOCK_NONE, &start_addr, &end_addr, NULL) { + start_pfn = PFN_UP(start_addr); + end_pfn = PFN_DOWN(end_addr); + + if (start_pfn < end_pfn) { + nr_all_pages += end_pfn - start_pfn; +#ifdef CONFIG_HIGHMEM + start_pfn = clamp(start_pfn, 0, high_zone_low); + end_pfn = clamp(end_pfn, 0, high_zone_low); +#endif + nr_kernel_pages += end_pfn - start_pfn; + } + } +} + static void __init calculate_node_totalpages(struct pglist_data *pgdat, unsigned long node_start_pfn, unsigned long node_end_pfn) -- 2.41.0
next prev parent reply other threads:[~2024-03-25 14:57 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-25 14:56 [PATCH v2 0/6] mm/mm_init.c: refactor free_area_init_core() Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-25 14:56 ` [PATCH v2 1/6] x86: remove unneeded memblock_find_dma_reserve() Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-26 6:44 ` Mike Rapoport 2024-03-26 6:44 ` Mike Rapoport 2024-03-25 14:56 ` [PATCH v2 2/6] mm/mm_init.c: remove the useless dma_reserve Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-26 6:44 ` Mike Rapoport 2024-03-26 6:44 ` Mike Rapoport 2024-03-25 14:56 ` Baoquan He [this message] 2024-03-25 14:56 ` [PATCH v2 3/6] mm/mm_init.c: add new function calc_nr_all_pages() Baoquan He 2024-03-26 6:57 ` Mike Rapoport 2024-03-26 6:57 ` Mike Rapoport 2024-03-26 13:49 ` Baoquan He 2024-03-26 13:49 ` Baoquan He 2024-03-27 15:40 ` Mike Rapoport 2024-03-27 15:40 ` Mike Rapoport 2024-03-25 14:56 ` [PATCH v2 4/6] mm/mm_init.c: remove meaningless calculation of zone->managed_pages in free_area_init_core() Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-27 15:40 ` Mike Rapoport 2024-03-27 15:40 ` Mike Rapoport 2024-03-28 8:32 ` Baoquan He 2024-03-28 8:32 ` Baoquan He 2024-03-28 9:53 ` Mike Rapoport 2024-03-28 9:53 ` Mike Rapoport 2024-03-28 14:46 ` Baoquan He 2024-03-28 14:46 ` Baoquan He 2024-03-28 9:12 ` [PATCH v3 " Baoquan He 2024-03-28 9:12 ` Baoquan He 2024-03-25 14:56 ` [PATCH v2 5/6] mm/mm_init.c: remove unneeded calc_memmap_size() Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-27 16:21 ` Mike Rapoport 2024-03-27 16:21 ` Mike Rapoport 2024-03-28 1:24 ` Baoquan He 2024-03-28 1:24 ` Baoquan He 2024-03-25 14:56 ` [PATCH v2 6/6] mm/mm_init.c: remove arch_reserved_kernel_pages() Baoquan He 2024-03-25 14:56 ` Baoquan He 2024-03-26 6:57 ` Mike Rapoport 2024-03-26 6:57 ` Mike Rapoport 2024-03-27 15:41 ` Mike Rapoport 2024-03-27 15:41 ` Mike Rapoport
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