Hi Jens, the second and third patch in this series provide two important improvements in bfq's ability to boost throughput with random I/O. The benefits of the second patch concern I/O control, and are described in detail in this LWN article [1] (and briefly in the commit message itself). The benefits of the other patch should be straightforward. Finally, the first patch fixes an I/O-control bug, found while making the second patch. These patches modify somehow core operations of bfq, so, before submitting them, I have tested them a lot, and have had them tested by other people too. In particular, during these months, they have been tested in systems ranging from PCs to development platforms. Thanks, Paolo [1] https://lwn.net/Articles/763603/ Paolo Valente (3): block, bfq: correctly charge and reset entity service in all cases block, bfq: inject other-queue I/O into seeky idle queues on NCQ flash blok, bfq: do not plug I/O if all queues are weight-raised block/bfq-iosched.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++------ block/bfq-iosched.h | 26 ++++++++++++++++++ block/bfq-wf2q.c | 13 ++++++--- 3 files changed, 106 insertions(+), 11 deletions(-) -- 2.16.1
