Hi Tejun, This update is against "scsi-mq" branch in Nicholas tree: git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git
A quick check with 'fio' tool's random reading indicates an moderate improvement on a single drive, four threads and the queue depth of 32: read : io=131072KB, bw=149785B/s, iops=36, runt=896066msec vs read : io=131072KB, bw=166884B/s, iops=40, runt=804257msec I have not measured cache line bouncing itself. I am kind of limited in hardware configurations, but let me know if you want to see more testing anyway. Thanks! Alexander Gordeev (1): libata: Get rid of ata_port::qc_allocated bitmask drivers/ata/libata-core.c | 82 +++++++++++++++++++++++++++++++------------- include/linux/libata.h | 6 ++- 2 files changed, 62 insertions(+), 26 deletions(-) -- 1.7.7.6 -- 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/
