diff options
| author | Baoquan He <bhe@redhat.com> | 2024-03-25 22:56:42 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-25 20:56:10 -0700 |
| commit | 6600a6b10c3210280e7623b8ba7feac9619cc2cd (patch) | |
| tree | 42cf8feb9bbc68007b987ddb0e3cd1ae126bbcb7 | |
| parent | fdb022f6e930152ba36fdac7c5caf3ee44306215 (diff) | |
mm/mm_init.c: remove the useless dma_reserve
Now nobody calls set_dma_reserve() to set value for dma_reserve, remove
set_dma_reserve(), global variable dma_reserve and the codes using it.
Link: https://lkml.kernel.org/r/20240325145646.1044760-3-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 1 | ||||
| -rw-r--r-- | mm/mm_init.c | 23 |
2 files changed, 0 insertions, 24 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index fe66b515aaab..22ae6ab621da 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3250,7 +3250,6 @@ static inline int early_pfn_to_nid(unsigned long pfn) extern int __meminit early_pfn_to_nid(unsigned long pfn); #endif -extern void set_dma_reserve(unsigned long new_dma_reserve); extern void mem_init(void); extern void __init mmap_init(void); diff --git a/mm/mm_init.c b/mm/mm_init.c index f45c2b32ba82..91bb8600c0fa 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -227,7 +227,6 @@ static unsigned long required_movablecore_percent __initdata; static unsigned long nr_kernel_pages __initdata; static unsigned long nr_all_pages __initdata; -static unsigned long dma_reserve __initdata; static bool deferred_struct_pages __meminitdata; @@ -1584,12 +1583,6 @@ static void __init free_area_init_core(struct pglist_data *pgdat) zone_names[j], memmap_pages, freesize); } - /* Account for reserved pages */ - if (j == 0 && freesize > dma_reserve) { - freesize -= dma_reserve; - pr_debug(" %s zone: %lu pages reserved\n", zone_names[0], dma_reserve); - } - if (!is_highmem_idx(j)) nr_kernel_pages += freesize; /* Charge for highmem memmap if there are enough kernel pages */ @@ -2548,22 +2541,6 @@ void *__init alloc_large_system_hash(const char *tablename, return table; } -/** - * set_dma_reserve - set the specified number of pages reserved in the first zone - * @new_dma_reserve: The number of pages to mark reserved - * - * The per-cpu batchsize and zone watermarks are determined by managed_pages. - * In the DMA zone, a significant percentage may be consumed by kernel image - * and other unfreeable allocations which can skew the watermarks badly. This - * function may optionally be used to account for unfreeable pages in the - * first zone (e.g., ZONE_DMA). The effect will be lower watermarks and - * smaller per-cpu batchsize. - */ -void __init set_dma_reserve(unsigned long new_dma_reserve) -{ - dma_reserve = new_dma_reserve; -} - void __init memblock_free_pages(struct page *page, unsigned long pfn, unsigned int order) { |