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From: Hans Holmberg <hans.ml.holmberg@owltronix.com>
To: Matias Bjorling <mb@lightnvm.io>
Cc: linux-block@vger.kernel.org,
	Javier Gonzales <javier@cnexlabs.com>,
	linux-kernel@vger.kernel.org,
	Hans Holmberg <hans.holmberg@cnexlabs.com>
Subject: [PATCH v2 0/3] Rework write error handling in pblk
Date: Tue, 24 Apr 2018 08:45:29 +0300	[thread overview]
Message-ID: <1524548732-4326-1-git-send-email-hans.ml.holmberg@owltronix.com> (raw)

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

             reply	other threads:[~2018-04-24  5:45 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-24  5:45 Hans Holmberg [this message]
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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