• Trond Myklebust's avatar
    pNFS: Add tracking to limit the number of pNFS retries · 33344e0f
    Trond Myklebust authored
    When the client is reading or writing using pNFS, and hits an error
    on the DS, then it typically sends a LAYOUTERROR and/or LAYOUTRETURN
    to the MDS, before redirtying the failed pages, and going for a new
    round of reads/writebacks. The problem is that if the server has no
    way to fix the DS, then we may need a way to interrupt this loop
    after a set number of attempts have been made.
    This patch adds an optional module parameter that allows the admin
    to specify how many times to retry the read/writeback process before
    failing with a fatal error.
    The default behaviour is to retry forever.
    Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
    Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
    33344e0f
flexfilelayout.c 65.5 KB