• Kefeng Wang's avatar
    s390: mm: accelerate pagefault when badaccess · 82b7a618
    Kefeng Wang authored
    The vm_flags of vma already checked under per-VMA lock, if it is a bad
    access, directly handle error, no need to retry with mmap_lock again. 
    Since the page faut is handled under per-VMA lock, count it as a vma lock
    event with VMA_LOCK_SUCCESS.
    
    Link: https://lkml.kernel.org/r/20240403083805.1818160-7-wangkefeng.wang@huawei.com
    
    Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
    Reviewed-by: default avatarHeiko Carstens <hca@linux.ibm.com>
    Cc: Albert Ou <aou@eecs.berkeley.edu>
    Cc: Alexander Gordeev <agordeev@linux.ibm.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
    Cc: Michael Ellerman <mpe@ellerman.id.au>
    Cc: Nicholas Piggin <npiggin@gmail.com>
    Cc: Palmer Dabbelt <palmer@dabbelt.com>
    Cc: Paul Walmsley <paul.walmsley@sifive.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Suren Baghdasaryan <surenb@google.com>
    Cc: Will Deacon <will@kernel.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    82b7a618
fault.c 15.8 KB