On 2014-11-02 15:49, Richard Weinberger wrote:
AFAICT blk-mq allocates one struct ubiblock_pdu per device. As all IO is done via scattergather the memory footprint should be good. But I'm sure Christoph can tell you the glory details.
That is true, the request list and pdu is allocated upfront. If that is a problem, the pdu need not be allocated upfront but could be done at IO time instead. With that comes a bit more complicated retry handling, for memory shortage situations.
-- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
