The patch titled
Subject: mm: mmu_gather: do not expose delayed_rmap flag
has been added to the -mm mm-unstable branch. Its filename is
mm-mmu_gather-do-not-expose-delayed_rmap-flag.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mmu_gather-do-not-expose-delayed_rmap-flag.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Subject: mm: mmu_gather: do not expose delayed_rmap flag
Date: Wed, 16 Nov 2022 08:49:30 +0100
Flag delayed_rmap of 'struct mmu_gather' is rather a private member, but
it is still accessed directly. Instead, let the TLB gather code access
the flag.
Link: https://lkml.kernel.org/r/Y3SWCu6NRaMQ5dbD@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 3 +--
mm/mmu_gather.c | 3 +++
2 files changed, 4 insertions(+), 2 deletions(-)
--- a/mm/memory.c~mm-mmu_gather-do-not-expose-delayed_rmap-flag
+++ a/mm/memory.c
@@ -1465,8 +1465,7 @@ again:
/* Do the actual TLB flush before dropping ptl */
if (force_flush) {
tlb_flush_mmu_tlbonly(tlb);
- if (tlb->delayed_rmap)
- tlb_flush_rmaps(tlb, vma);
+ tlb_flush_rmaps(tlb, vma);
}
pte_unmap_unlock(start_pte, ptl);
--- a/mm/mmu_gather.c~mm-mmu_gather-do-not-expose-delayed_rmap-flag
+++ a/mm/mmu_gather.c
@@ -60,6 +60,9 @@ void tlb_flush_rmaps(struct mmu_gather *
{
struct mmu_gather_batch *batch;
+ if (!tlb->delayed_rmap)
+ return;
+
batch = tlb->active;
for (int i = 0; i < batch->nr; i++) {
struct encoded_page *enc = batch->encoded_pages[i];
_
Patches currently in -mm which might be from agordeev@xxxxxxxxxxxxx are
mm-mmu_gather-do-not-expose-delayed_rmap-flag.patch
