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* [PATCH v2 0/3] Rework write error handling in pblk
@ 2018-04-24  5:45 Hans Holmberg
  2018-04-24  5:45 ` [PATCH v2 1/3] lightnvm: pblk: rework write error recovery path Hans Holmberg
                   ` (4 more replies)
  0 siblings, 5 replies; 11+ messages in thread
From: Hans Holmberg @ 2018-04-24  5:45 UTC (permalink / raw)
  To: Matias Bjorling; +Cc: linux-block, Javier Gonzales, linux-kernel, Hans Holmberg

From: Hans Holmberg <hans.holmberg@cnexlabs.com>

This patch series fixes the(currently incomplete) write error handling 
in pblk by:

 * queuing and re-submitting failed writes in the write buffer
 * evacuating valid data data in lines with write failures, so the
   chunk(s) with write failures can be reset to a known state by the fw

Lines with failures in smeta are put back on the free list.
Failed chunks will be reset on the next use.

If a write failes in emeta, the lba list is cached so the line can be 
garbage collected without scanning the out-of-band area.

Changes in V2:
- Added the recov_writes counter increase to the new path
- Moved lba list emeta reading during gc to a separate function
- Allocating the saved lba list with pblk_malloc instead of kmalloc
- Fixed formatting issues
- Removed dead code

Hans Holmberg (3):
  lightnvm: pblk: rework write error recovery path
  lightnvm: pblk: garbage collect lines with failed writes
  lightnvm: pblk: fix smeta write error path

 drivers/lightnvm/pblk-core.c     |  52 +++++++-
 drivers/lightnvm/pblk-gc.c       | 102 +++++++++------
 drivers/lightnvm/pblk-init.c     |  47 ++++---
 drivers/lightnvm/pblk-rb.c       |  39 ------
 drivers/lightnvm/pblk-recovery.c |  91 -------------
 drivers/lightnvm/pblk-rl.c       |  29 ++++-
 drivers/lightnvm/pblk-sysfs.c    |  15 ++-
 drivers/lightnvm/pblk-write.c    | 269 ++++++++++++++++++++++++++-------------
 drivers/lightnvm/pblk.h          |  36 ++++--
 9 files changed, 384 insertions(+), 296 deletions(-)

-- 
2.7.4

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2018-05-07 13:05 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-24  5:45 [PATCH v2 0/3] Rework write error handling in pblk Hans Holmberg
2018-04-24  5:45 ` [PATCH v2 1/3] lightnvm: pblk: rework write error recovery path Hans Holmberg
2018-04-30  9:13   ` Javier Gonzalez
2018-04-24  5:45 ` [PATCH v2 2/3] lightnvm: pblk: garbage collect lines with failed writes Hans Holmberg
2018-04-30  9:14   ` Javier Gonzalez
2018-04-30  9:19     ` Javier Gonzalez
2018-04-24  5:45 ` [PATCH v2 3/3] lightnvm: pblk: fix smeta write error path Hans Holmberg
2018-04-30  9:19   ` Javier Gonzalez
2018-04-28 19:31 ` [PATCH v2 0/3] Rework write error handling in pblk Matias Bjørling
2018-04-30  9:11   ` Javier Gonzalez
2018-05-07 13:05 ` Matias Bjørling

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