search for: req_fua

I am proposing these two patches for 3.2. They allow the backend to process the REQ_FUA request as well. Previous to these patches it only did REQ_FLUSH. There is also a bug-fix for the logic of how barrier/flushes were handled. The patches are based on a branch which also has ''feature-discard'' patches, so they won''t apply nativly on top of 3.1-rc5. Please...

Hi folks, This version added REQ_FLUSH and REQ_FUA support as suggested by Christoph and rebased against latest linus's tree. Jens, could you please consider picking up the dependencies 1/4 and 2/4 in your tree. Thanks! This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows bio-based IO path gives t...

Hi folks, This version added REQ_FLUSH and REQ_FUA support as suggested by Christoph and rebased against latest linus's tree. Jens, could you please consider picking up the dependencies 1/4 and 2/4 in your tree. Thanks! This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows bio-based IO path gives t...

Hi, all This version reworked on REQ_FLUSH and REQ_FUA support as suggested by Christoph and dropped the block core bits since Jens has picked them up. Fio test shows bio-based IO path gives the following performance improvement: 1) Ramdisk device With bio-based IO path, sequential read/write, random read/write IOPS boost : 28%, 24%...

Hi, all This version reworked on REQ_FLUSH and REQ_FUA support as suggested by Christoph and dropped the block core bits since Jens has picked them up. Fio test shows bio-based IO path gives the following performance improvement: 1) Ramdisk device With bio-based IO path, sequential read/write, random read/write IOPS boost : 28%, 24%...

...%, 12%, 10% 3) Normal SATA device With bio-based IO path, sequential read/write, random read/write IOPS boost : -10%, -10%, 4.4%, 0.5% Latency improvement: -12%, -15%, 2.5%, 0.8% Asias He (2): virtio-blk: Add bio-based IO path for virtio-blk virtio-blk: Add REQ_FLUSH and REQ_FUA support to bio path drivers/block/virtio_blk.c | 301 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 264 insertions(+), 37 deletions(-) -- 1.7.11.2

...%, 12%, 10% 3) Normal SATA device With bio-based IO path, sequential read/write, random read/write IOPS boost : -10%, -10%, 4.4%, 0.5% Latency improvement: -12%, -15%, 2.5%, 0.8% Asias He (2): virtio-blk: Add bio-based IO path for virtio-blk virtio-blk: Add REQ_FLUSH and REQ_FUA support to bio path drivers/block/virtio_blk.c | 301 +++++++++++++++++++++++++++++++++++++++------ 1 file changed, 264 insertions(+), 37 deletions(-) -- 1.7.11.2

This is a resend of a previously sent patch-set. This patch-set deals with some of the style isues in blkvsc_drv.c. We also get rid most of the "dead code" in this file: 1) Get rid of most of the forward declarations in this file. The only remaining forward declarations are to deal with circular dependencies. 2) Get rid of most of the dead code in the file. Some of the

This is a resend of a previously sent patch-set. This patch-set deals with some of the style isues in blkvsc_drv.c. We also get rid most of the "dead code" in this file: 1) Get rid of most of the forward declarations in this file. The only remaining forward declarations are to deal with circular dependencies. 2) Get rid of most of the dead code in the file. Some of the

This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16% latency improvement for sequential read/write, random read/write respectively. Asias He (3): block: Introduce __blk_segment_map_sg() helper block: Add blk_bio_map_sg() helper virtio-blk: Add bio-based IO path for virtio-blk

This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows it gives, 28%, 24%, 21%, 16% IOPS boost and 32%, 17%, 21%, 16% latency improvement for sequential read/write, random read/write respectively. Asias He (3): block: Introduce __blk_segment_map_sg() helper block: Add blk_bio_map_sg() helper virtio-blk: Add bio-based IO path for virtio-blk

...sh(nd_region); + ret = nvdimm_flush(nd_region, bio); do_acct = nd_iostat_start(bio, &start); bio_for_each_segment(bvec, bio, iter) { @@ -216,7 +217,10 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio) nd_iostat_end(bio, start); if (bio->bi_opf & REQ_FUA) - nvdimm_flush(nd_region); + ret = nvdimm_flush(nd_region, bio); + + if (ret) + bio->bi_status = errno_to_blk_status(ret); bio_endio(bio); return BLK_QC_T_NONE; @@ -469,7 +473,6 @@ static int pmem_attach_disk(struct device *dev, } dax_write_cache(dax_dev, nvdimm_has_cache(nd_region...

This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows bio-based IO path gives the following performance improvement: 1) Ramdisk device With bio-based IO path, sequential read/write, random read/write IOPS boost : 28%, 24%, 21%, 16% Latency improvement: 32%, 17%, 21%, 16% 2) Fusion IO device With bio-based IO path, sequential

This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows bio-based IO path gives the following performance improvement: 1) Ramdisk device With bio-based IO path, sequential read/write, random read/write IOPS boost : 28%, 24%, 21%, 16% Latency improvement: 32%, 17%, 21%, 16% 2) Fusion IO device With bio-based IO path, sequential

...region); + ret = nvdimm_flush(nd_region, bio, true); do_acct = nd_iostat_start(bio, &start); bio_for_each_segment(bvec, bio, iter) { @@ -216,7 +217,10 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio) nd_iostat_end(bio, start); if (bio->bi_opf & REQ_FUA) - nvdimm_flush(nd_region); + ret = nvdimm_flush(nd_region, bio, true); + + if (ret) + bio->bi_status = errno_to_blk_status(ret); bio_endio(bio); return BLK_QC_T_NONE; @@ -463,13 +467,13 @@ static int pmem_attach_disk(struct device *dev, disk->bb = &pmem->bb; dax_dev = a...

More cleanup. In this patch-set we deal with the following issues: 1) While a Linux guest on Hyper-V can be assigned removable media devices (DVD, floppy etc), these devices are not handled by the Hyper-V block driver. So, we cleanup all the dead code dealing with removable media devices. 2) There were multiple functions to retrieve information about the device. Since much of

More cleanup. In this patch-set we deal with the following issues: 1) While a Linux guest on Hyper-V can be assigned removable media devices (DVD, floppy etc), these devices are not handled by the Hyper-V block driver. So, we cleanup all the dead code dealing with removable media devices. 2) There were multiple functions to retrieve information about the device. Since much of

The latest upstream merge changed struct block_device_operations: This merge got rid of blkvsc_media_changed and introduced the function blkvsc_check_events. This broke all the patches that were sent after the tree was closed the last time. This is a resend of this patch-set to account for this change in the kernel. More cleanup. In this patch-set we deal with the following issues: 1) While a

The latest upstream merge changed struct block_device_operations: This merge got rid of blkvsc_media_changed and introduced the function blkvsc_check_events. This broke all the patches that were sent after the tree was closed the last time. This is a resend of this patch-set to account for this change in the kernel. More cleanup. In this patch-set we deal with the following issues: 1) While a

This patch-set deals with some of the style isues in blkvsc_drv.c. We also get rid most of the "dead code" in this file: 1) Get rid of most of the forward declarations in this file. The only remaining forward declarations are to deal with circular dependencies. 2) Get rid of most of the dead code in the file. Some of the functions in this file are place holders - they