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    x86, UV: Remove BAU check for stay-busy · 90cc7d94
    Cliff Wickman 提交于
    Remove a faulty assumption that a long running BAU request has
    encountered a hardware problem and will never finish.
    
    Numalink congestion can make a request appear to have
    encountered such a problem, but it is not safe to cancel the
    request.  If such a cancel is done but a reply is later received
    we can miss a TLB shootdown.
    
    We depend upon the max_bau_concurrent 'throttle' to prevent the
    stay-busy case from happening.
    Signed-off-by: NCliff Wickman <cpw@sgi.com>
    Cc: gregkh@suse.de
    LKML-Reference: <E1OJvNy-0004ad-BV@eag09.americas.sgi.com>
    Signed-off-by: NIngo Molnar <mingo@elte.hu>
    90cc7d94
tlb_uv.c 44.9 KB