The patch titled
Subject: mm/page_alloc.c: remove meaningless VM_BUG_ON() in pindex_to_order()
has been added to the -mm tree. Its filename is
mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/page_alloc.c: remove meaningless VM_BUG_ON() in pindex_to_order()
Patch series "Cleanups and fixup for page_alloc", v2.
This series contains cleanups to remove meaningless VM_BUG_ON(), use
helpers to simplify the code and remove obsolete comment. Also we avoid
allocating highmem pages via alloc_pages_exact[_nid]. More details can be
found in the respective changelogs.
This patch (of 5):
It's meaningless to VM_BUG_ON() order != pageblock_order just after
setting order to pageblock_order. Remove it.
Link: https://lkml.kernel.org/r/20210902121242.41607-1-linmiaohe@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20210902121242.41607-2-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/mm/page_alloc.c~mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order
+++ a/mm/page_alloc.c
@@ -677,10 +677,8 @@ static inline int pindex_to_order(unsign
int order = pindex / MIGRATE_PCPTYPES;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- if (order > PAGE_ALLOC_COSTLY_ORDER) {
+ if (order > PAGE_ALLOC_COSTLY_ORDER)
order = pageblock_order;
- VM_BUG_ON(order != pageblock_order);
- }
#else
VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER);
#endif
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-page_allocc-remove-meaningless-vm_bug_on-in-pindex_to_order.patch
mm-page_allocc-simplify-the-code-by-using-macro-k.patch
mm-page_allocc-fix-obsolete-comment-in-free_pcppages_bulk.patch
mm-page_allocc-use-helper-function-zone_spans_pfn.patch
mm-page_allocc-avoid-allocating-highmem-pages-via-alloc_pages_exact.patch
mm-page_isolation-fix-potential-missing-call-to-unset_migratetype_isolate.patch
mm-page_isolation-guard-against-possible-putback-unisolated-page.patch
mm-memory_hotplug-make-hwpoisoned-dirty-swapcache-pages-unmovable.patch
mm-zsmallocc-close-race-window-between-zs_pool_dec_isolated-and-zs_unregister_migration.patch
mm-zsmallocc-combine-two-atomic-ops-in-zs_pool_dec_isolated.patch
