The patch titled
Subject: mm: page_owner: fetch backtrace only for tracked pages
has been added to the -mm tree. Its filename is
mm-page_owner-fetch-backtrace-only-for-tracked-pages.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_owner-fetch-backtrace-only-for-tracked-pages.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_owner-fetch-backtrace-only-for-tracked-pages.patch
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------------------------------------------------------
From: Sergei Trofimovich <slyfox@xxxxxxxxxx>
Subject: mm: page_owner: fetch backtrace only for tracked pages
Very minor optimization.
Link: https://lkml.kernel.org/r/20210401212445.3534721-1-slyfox@xxxxxxxxxx
Signed-off-by: Sergei Trofimovich <slyfox@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_owner.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/page_owner.c~mm-page_owner-fetch-backtrace-only-for-tracked-pages
+++ a/mm/page_owner.c
@@ -147,15 +147,15 @@ void __reset_page_owner(struct page *pag
{
int i;
struct page_ext *page_ext;
- depot_stack_handle_t handle = 0;
+ depot_stack_handle_t handle;
struct page_owner *page_owner;
u64 free_ts_nsec = local_clock();
- handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);
-
page_ext = lookup_page_ext(page);
if (unlikely(!page_ext))
return;
+
+ handle = save_stack(GFP_NOWAIT | __GFP_NOWARN);
for (i = 0; i < (1 << order); i++) {
__clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);
page_owner = get_page_owner(page_ext);
_
Patches currently in -mm which might be from slyfox@xxxxxxxxxx are
ia64-fix-user_stack_pointer-for-ptrace.patch
ia64-drop-unused-ia64_fw_emu-ifdef.patch
ia64-simplify-code-flow-around-swiotlb-init.patch
ia64-fix-efi_debug-build.patch
ia64-mca-always-make-ia64_mca_debug-an-expression.patch
mm-page_owner-fetch-backtrace-only-for-tracked-pages.patch
mm-page_alloc-ignore-init_on_free=1-for-debug_pagealloc=1.patch
