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From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
To: dan.j.williams@intel.com, linux-nvdimm@lists.01.org
Cc: alexander.h.duyck@linux.intel.com, zwisler@kernel.org
Subject: [nvdimm PATCH 0/6] Label initialization time optimizations
Date: Wed, 10 Oct 2018 16:36:15 -0700	[thread overview]
Message-ID: <20181010233428.12228.26106.stgit@localhost.localdomain> (raw)

This patch set is intended to improve NVDIMM label read times by first
increasing the upper limit on the label read/write size, and then
reducing the number of reads by making use of the free label bitmap in
the index to determine what labels are actually populated and only read
those labels. In my testing on a system populated with 24 NVDIMM modules
I see the total label init time drop from about 24 seconds down to 2 to
3 seconds. 

In the process of coding this up I came across a few minor issues that
I felt should be addressed so I have added a few patches for those fixes
along the way.

---

Alexander Duyck (5):
      nvdimm: Sanity check labeloff
      nvdimm: Clarify comment in sizeof_namespace_index
      nvdimm: Remove empty if statement
      nvdimm: Split label init out from the logic for getting config data
      nvdimm: Use namespace index data to reduce number of label reads needed

Dan Williams (1):
      libnvdimm, dimm: Maximize label transfer size


 drivers/nvdimm/dimm.c      |    6 --
 drivers/nvdimm/dimm_devs.c |   60 +++++++------------
 drivers/nvdimm/label.c     |  142 ++++++++++++++++++++++++++++++++++++++++++--
 drivers/nvdimm/label.h     |    4 -
 drivers/nvdimm/nd.h        |    2 +
 5 files changed, 163 insertions(+), 51 deletions(-)

--
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             reply	other threads:[~2018-10-10 23:36 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-10 23:36 Alexander Duyck [this message]
2018-10-10 23:38 ` [nvdimm PATCH 1/6] libnvdimm, dimm: Maximize label transfer size Alexander Duyck
2018-10-10 23:38 ` [nvdimm PATCH 2/6] nvdimm: Sanity check labeloff Alexander Duyck
2018-10-10 23:38 ` [nvdimm PATCH 3/6] nvdimm: Clarify comment in sizeof_namespace_index Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 4/6] nvdimm: Remove empty if statement Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 5/6] nvdimm: Split label init out from the logic for getting config data Alexander Duyck
2018-10-10 23:39 ` [nvdimm PATCH 6/6] nvdimm: Use namespace index data to reduce number of label reads needed Alexander Duyck
2018-10-12  1:35   ` Dan Williams
2018-10-11  4:48 ` [nvdimm PATCH 0/6] Label initialization time optimizations Dan Williams
2018-10-12 15:36 ` Kani, Toshi

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