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Subject[PATCH 00/20] LightNVM: pblk patches for 4.13
Date
Hi Matias,

Here you have the pblk patchset for this window.

Apart from small fixes for LightNVM core and pblk, there are three
relevant changes:

- Metadata for each line is no longer issued on a separate workqueue,
but instead, all I/Os are scheduled on the write thread. This allows
to have more control over LUN collisions. The result is that we can
use the full bandwidth of the device for user data. In the 4.12 pblk,
we use ~25% of the bandwidth for metadata.

- The rate-limiter and GC have been tuned to keep the GC writer busy.
Also, capacity per line is guaranteed for GC I/O as we reach
capacity.

- We have now a FTL state machine. This allows to fail gracefully to
user space in case of irrecoverable errors. This state machine will
be the base for the pblk's FTL log.

The patches apply into your for-4.13/core. You can also find them in:

https://github.com/OpenChannelSSD/linux.git pblk.for-4.13

Thanks,
Javier

Javier González (20):
lightnvm: re-convert ppa format on I/O failure
lightnvm: propagate right error code to target
lightnvm: pblk: spare double cpu_to_le64 calc.
lightnvm: pblk: add debug stat for read cache hits
lightnvm: pblk: expose max sec per write on sysfs
lightnvm: pblk: generalize erase path
lightnvm: pblk: rename read request pool
lightnvm: pblk: sched. metadata on write thread
lightnvm: pblk: delete redundant debug line stat
lightnvm: pblk: delete redundant buffer pointer
lightnvm: pblk: issue multiplane reads if possible
lightnvm: pblk: simplify meta. memory allocation
lightnvm: pblk: decouple bad block from line alloc
lightnvm: pblk: choose optimal victim GC line
lightnvm: pblk: set metadata list for all I/Os
lightnvm: pblk: cleanup unnecessary code
lightnvm: pblk: add lock assertions on helpers
lightnvm: pblk: redesign GC algorithm
lightnvm: pblk: set mempool and workqueue params.
lightnvm: pblk: fail gracefully on irrec. error

drivers/lightnvm/core.c | 8 +-
drivers/lightnvm/pblk-cache.c | 8 +-
drivers/lightnvm/pblk-core.c | 606 ++++++++++++++++++++++++++-------------
drivers/lightnvm/pblk-gc.c | 488 ++++++++++++++++++-------------
drivers/lightnvm/pblk-init.c | 358 ++++++++++++++---------
drivers/lightnvm/pblk-map.c | 73 +++--
drivers/lightnvm/pblk-rb.c | 79 +++--
drivers/lightnvm/pblk-read.c | 82 +++---
drivers/lightnvm/pblk-recovery.c | 130 +++++----
drivers/lightnvm/pblk-rl.c | 88 ++++--
drivers/lightnvm/pblk-sysfs.c | 114 ++++----
drivers/lightnvm/pblk-write.c | 350 +++++++++++++++++-----
drivers/lightnvm/pblk.h | 275 +++++++++++++-----
drivers/nvme/host/lightnvm.c | 2 +-
14 files changed, 1763 insertions(+), 898 deletions(-)

--
2.7.4

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