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mm/mm_init.c: use deferred_init_mem_pfn_range_in_zone() to decide loop condition

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If deferred_init_mem_pfn_range_in_zone() return true, we know it finds
some range in (spfn, epfn). Then we can use it directly for the loop
condition.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Link: https://lore.kernel.org/all/20240605071339.15330-1-richard.weiyang@gmail.com
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
This commit is contained in:
Wei Yang 2024-06-05 07:13:38 +00:00 committed by Mike Rapoport (IBM)
parent ce8ebb9543
commit 544b8e14c2
1 changed files with 4 additions and 11 deletions
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15
mm/mm_init.c
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@ -2170,20 +2170,15 @@ static int __init deferred_init_memmap(void *data)
/* Only the highest zone is deferred */
zone = pgdat->node_zones + pgdat->nr_zones - 1;
/* If the zone is empty somebody else may have cleared out the zone */
if (!deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,
first_init_pfn))
goto zone_empty;
max_threads = deferred_page_init_max_threads(cpumask);
while (spfn < epfn) {
unsigned long epfn_align = ALIGN(epfn, PAGES_PER_SECTION);
while (deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn, first_init_pfn)) {
first_init_pfn = ALIGN(epfn, PAGES_PER_SECTION);
struct padata_mt_job job = {
.thread_fn = deferred_init_memmap_chunk,
.fn_arg = zone,
.start = spfn,
.size = epfn_align - spfn,
.size = first_init_pfn - spfn,
.align = PAGES_PER_SECTION,
.min_chunk = PAGES_PER_SECTION,
.max_threads = max_threads,
@ -2191,10 +2186,8 @@ static int __init deferred_init_memmap(void *data)
};
padata_do_multithreaded(&job);
deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,
epfn_align);
}
zone_empty:
/* Sanity check that the next zone really is unpopulated */
WARN_ON(pgdat->nr_zones < MAX_NR_ZONES && populated_zone(++zone));