c06fb25d1f
Some checks failed
Build Kernel / Build all affected Kernels (push) Has been cancelled
Build all core packages / Build all core packages for selected target (push) Has been cancelled
Build and Push prebuilt tools container / Build and Push all prebuilt containers (push) Has been cancelled
Build Toolchains / Build Toolchains for each target (push) Has been cancelled
Build host tools / Build host tools for linux and macos based systems (push) Has been cancelled
Coverity scan build / Coverity x86/64 build (push) Has been cancelled
28 lines
957 B
Diff
28 lines
957 B
Diff
From 536f2097dc397e4ebd0566e8f00219c02d7c8073 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Thu, 12 Sep 2024 10:06:50 +0100
|
|
Subject: [PATCH 1261/1350] mm/vmscan: Maintain TLB coherency in LRU code
|
|
|
|
As a workaround (and possibly a fix) for CPU spins observed on BCM2837,
|
|
use ptep_clear_flush_young instead of ptep_test_and_clear_young inside
|
|
lru_gen_look_around in order to expose PTE changes to the MMU. Note that
|
|
on architectures that don't require an explicit flush,
|
|
ptep_clear_flush_young just calls ptep_test_and_clear_young.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
mm/vmscan.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
--- a/mm/vmscan.c
|
|
+++ b/mm/vmscan.c
|
|
@@ -4716,7 +4716,7 @@ void lru_gen_look_around(struct page_vma
|
|
if (!folio)
|
|
continue;
|
|
|
|
- if (!ptep_test_and_clear_young(vma, addr, pte + i))
|
|
+ if (!ptep_clear_flush_young(vma, addr, pte + i))
|
|
VM_WARN_ON_ONCE(true);
|
|
|
|
young++;
|