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    RDS: Use page_remainder_alloc() for recv bufs · 0b088e00
    Andy Grover 提交于
    Instead of splitting up a page into RDS_FRAG_SIZE chunks
    ourselves, ask rds_page_remainder_alloc() to do it. While it
    is possible PAGE_SIZE > FRAG_SIZE, on x86en it isn't, so having
    duplicate "carve up a page into buffers" code seems excessive.
    
    The other modification this spawns is the use of a single
    struct scatterlist in rds_page_frag instead of a bare page ptr.
    This causes verbosity to increase in some places, and decrease
    in others.
    
    Finally, I decided to unify the lifetimes and alloc/free of
    rds_page_frag and its page. This is a nice simplification in itself,
    but will be extra-nice once we come to adding cmason's recycling
    patch.
    Signed-off-by: NAndy Grover <andy.grover@oracle.com>
    0b088e00
page.c 5.9 KB