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| author | Suren Baghdasaryan <[email protected]> | 2024-03-21 16:36:41 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-04-26 03:55:54 +0000 |
| commit | be25d1d4e822a703b19043baff916aec6ac4362d (patch) | |
| tree | 67f35763c7f0f33bbef8f46fda3db0cfb3b6be2f /mm/huge_memory.c | |
| parent | mm: enable page allocation tagging (diff) | |
| download | kernel-be25d1d4e822a703b19043baff916aec6ac4362d.tar.gz kernel-be25d1d4e822a703b19043baff916aec6ac4362d.zip | |
mm: create new codetag references during page splitting
When a high-order page is split into smaller ones, each newly split page
should get its codetag. After the split each split page will be
referencing the original codetag. The codetag's "bytes" counter remains
the same because the amount of allocated memory has not changed, however
the "calls" counter gets increased to keep the counter correct when these
individual pages get freed.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Suren Baghdasaryan <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Tested-by: Kees Cook <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Alice Ryhl <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: Benno Lossin <[email protected]>
Cc: "Björn Roy Baron" <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Gary Guo <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Wedson Almeida Filho <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index dd88bb3ea196..25191ab70631 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -38,6 +38,7 @@ #include <linux/sched/sysctl.h> #include <linux/memory-tiers.h> #include <linux/compat.h> +#include <linux/pgalloc_tag.h> #include <asm/tlb.h> #include <asm/pgalloc.h> @@ -2946,6 +2947,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, /* Caller disabled irqs, so they are still disabled here */ split_page_owner(head, order, new_order); + pgalloc_tag_split(head, 1 << order); /* See comment in __split_huge_page_tail() */ if (folio_test_anon(folio)) { |