linux-kernel - [PATCH 0/3] Rework write error handling in pblk

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Message-Id: <1524155964-3743-1-git-send-email-hans.ml.holmberg@owltronix.com>
Date:   Thu, 19 Apr 2018 18:39:21 +0200
From:   Hans Holmberg <hans.ml.holmberg@...tronix.com>
To:     Matias Bjorling <mb@...htnvm.io>
Cc:     linux-block@...r.kernel.org, Javier Gonzales <javier@...xlabs.com>,
        linux-kernel@...r.kernel.org,
        Hans Holmberg <hans.holmberg@...xlabs.com>
Subject: [PATCH 0/3] Rework write error handling in pblk

From: Hans Holmberg <hans.holmberg@...xlabs.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.

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     |  50 +++++++-
 drivers/lightnvm/pblk-gc.c       |  79 ++++++++-----
 drivers/lightnvm/pblk-init.c     |  41 +++++--
 drivers/lightnvm/pblk-recovery.c |  91 ---------------
 drivers/lightnvm/pblk-rl.c       |  29 ++++-
 drivers/lightnvm/pblk-sysfs.c    |  15 ++-
 drivers/lightnvm/pblk-write.c    | 243 ++++++++++++++++++++++++++++-----------
 drivers/lightnvm/pblk.h          |  33 ++++--
 8 files changed, 362 insertions(+), 219 deletions(-)

-- 
2.7.4