Messages in this thread | | | Date | Sat, 7 Nov 2015 16:52:49 -0700 | From | Jens Axboe <> | Subject | [GIT PULL] IO poll support |
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Hi Linus,
Various groups have been doing experimentation around IO polling for (really) fast devices. The code has been reviewed and has been sitting on the side for a few releases, but this is now good enough for coordinated benchmarking and further experimentation.
Currently O_DIRECT sync read/write are supported. A framework is in the works that allows scalable stats tracking so we can auto-tune this. And we'll add libaio support as well soon. Fow now, it's an opt-in feature for test purposes.
Please pull!
git://git.kernel.dk/linux-block.git for-4.4/io-poll
---------------------------------------------------------------- Jens Axboe (5): block: change ->make_request_fn() and users to return a queue cookie blk-mq: return tag/queue combo in the make_request_fn handlers block: add block polling support NVMe: add blk polling support directio: add block polling support
arch/m68k/emu/nfblock.c | 3 +- arch/powerpc/sysdev/axonram.c | 5 ++- arch/xtensa/platforms/iss/simdisk.c | 3 +- block/blk-core.c | 67 ++++++++++++++++++++++++----- block/blk-mq-sysfs.c | 10 +++++ block/blk-mq.c | 59 +++++++++++++++---------- block/blk-sysfs.c | 35 +++++++++++++++ drivers/block/brd.c | 5 ++- drivers/block/drbd/drbd_int.h | 2 +- drivers/block/drbd/drbd_req.c | 3 +- drivers/block/null_blk.c | 3 +- drivers/block/pktcdvd.c | 9 ++-- drivers/block/ps3vram.c | 6 ++- drivers/block/rsxx/dev.c | 5 ++- drivers/block/umem.c | 4 +- drivers/block/zram/zram_drv.c | 5 ++- drivers/lightnvm/rrpc.c | 9 ++-- drivers/md/bcache/request.c | 11 +++-- drivers/md/dm.c | 6 +-- drivers/md/md.c | 8 ++-- drivers/nvdimm/blk.c | 3 +- drivers/nvdimm/btt.c | 3 +- drivers/nvdimm/pmem.c | 3 +- drivers/nvme/host/pci.c | 32 ++++++++++++-- drivers/s390/block/dcssblk.c | 8 ++-- drivers/s390/block/xpram.c | 5 ++- drivers/staging/lustre/lustre/llite/lloop.c | 5 ++- fs/direct-io.c | 14 ++++-- include/linux/blk-mq.h | 10 +++++ include/linux/blk_types.h | 24 +++++++++++ include/linux/blkdev.h | 7 ++- include/linux/fs.h | 2 +- include/linux/lightnvm.h | 2 +- 33 files changed, 286 insertions(+), 90 deletions(-)
-- Jens Axboe
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