diff options
| author | SeongJae Park <sj@kernel.org> | 2025-04-09 17:00:22 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-05-11 17:48:27 -0700 |
| commit | 43c4cfde7e37460482e41dbb6837d4bff290d2cc (patch) | |
| tree | 5e96c4d62cb115c0f3be8b2fc399e568cdf3c396 /mm/memory.c | |
| parent | de8efdf8cd273619121cbc2f0f70dddc74bc586e (diff) | |
mm/madvise: batch tlb flushes for MADV_DONTNEED[_LOCKED]
MADV_DONTNEED[_LOCKED] handling for [process_]madvise() flushes tlb for
each vma of each address range. Update the logic to do tlb flushes in a
batched way. Initialize an mmu_gather object from do_madvise() and
vector_madvise(), which are the entry level functions for
[process_]madvise(), respectively. And pass those objects to the function
for per-vma work, via madvise_behavior struct. Make the per-vma logic not
flushes tlb on their own but just saves the tlb entries to the received
mmu_gather object. For this internal logic change, make
zap_page_range_single_batched() non-static and use it directly from
madvise_dontneed_single_vma(). Finally, the entry level functions flush
the tlb entries that gathered for the entire user request, at once.
Link: https://lkml.kernel.org/r/20250410000022.1901-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c index 33d34722e339..71c255f3fdcc 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1998,7 +1998,7 @@ void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas, mmu_notifier_invalidate_range_end(&range); } -/* +/** * zap_page_range_single_batched - remove user pages in a given range * @tlb: pointer to the caller's struct mmu_gather * @vma: vm_area_struct holding the applicable pages @@ -2009,7 +2009,7 @@ void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas, * @tlb shouldn't be NULL. The range must fit into one VMA. If @vma is for * hugetlb, @tlb is flushed and re-initialized by this function. */ -static void zap_page_range_single_batched(struct mmu_gather *tlb, +void zap_page_range_single_batched(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long address, unsigned long size, struct zap_details *details) { |