• NeilBrown's avatar
    nfsd: Only set PF_LESS_THROTTLE when really needed. · 8658452e
    NeilBrown authored
    PF_LESS_THROTTLE has a very specific use case: to avoid deadlocks
    and live-locks while writing to the page cache in a loop-back
    NFS mount situation.
    
    It therefore makes sense to *only* set PF_LESS_THROTTLE in this
    situation.
    We now know when a request came from the local-host so it could be a
    loop-back mount.  We already know when we are handling write requests,
    and when we are doing anything else.
    
    So combine those two to allow nfsd to still be throttled (like any
    other process) in every situation except when it is known to be
    problematic.
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
    8658452e
vfs.c 50.1 KB