diff options
| author | Yicong Yang <yangyicong@hisilicon.com> | 2023-07-17 21:10:03 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:37 -0700 |
| commit | db6c1f6f236dbcd271d51d37675bbccfcea7c7be (patch) | |
| tree | 9eaad43dc7cb5d30c8e8b24f618c96aea5c50a19 /mm | |
| parent | f73419bb89d606de9be2043febf0957d56627a5b (diff) | |
| download | lwn-db6c1f6f236dbcd271d51d37675bbccfcea7c7be.tar.gz lwn-db6c1f6f236dbcd271d51d37675bbccfcea7c7be.zip | |
mm/tlbbatch: introduce arch_flush_tlb_batched_pending()
Currently we'll flush the mm in flush_tlb_batched_pending() to avoid race
between reclaim unmaps pages by batched TLB flush and mprotect/munmap/etc.
Other architectures like arm64 may only need a synchronization
barrier(dsb) here rather than a full mm flush. So add
arch_flush_tlb_batched_pending() to allow an arch-specific implementation
here. This intends no functional changes on x86 since still a full mm
flush for x86.
Link: https://lkml.kernel.org/r/20230717131004.12662-4-yangyicong@huawei.com
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Barry Song <baohua@kernel.org>
Cc: Barry Song <v-songbaohua@oppo.com>
Cc: Darren Hart <darren@os.amperecomputing.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: lipeifeng <lipeifeng@oppo.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Punit Agrawal <punit.agrawal@bytedance.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xin Hao <xhao@linux.alibaba.com>
Cc: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/rmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index f6fb821d56a8..5717517e4040 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -717,7 +717,7 @@ void flush_tlb_batched_pending(struct mm_struct *mm) int flushed = batch >> TLB_FLUSH_BATCH_FLUSHED_SHIFT; if (pending != flushed) { - flush_tlb_mm(mm); + arch_flush_tlb_batched_pending(mm); /* * If the new TLB flushing is pending during flushing, leave * mm->tlb_flush_batched as is, to avoid losing flushing. |