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mm/tlbbatch: introduce arch_flush_tlb_batched_pending()
authorYicong Yang <yangyicong@hisilicon.com>
Mon, 17 Jul 2023 13:10:03 +0000 (21:10 +0800)
committerAndrew Morton <akpm@linux-foundation.org>
Fri, 18 Aug 2023 17:12:37 +0000 (10:12 -0700)
commitdb6c1f6f236dbcd271d51d37675bbccfcea7c7be
tree9eaad43dc7cb5d30c8e8b24f618c96aea5c50a19
parentf73419bb89d606de9be2043febf0957d56627a5b
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>
arch/x86/include/asm/tlbflush.h
mm/rmap.c