nvdimm.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Dan Williams <dan.j.williams@intel.com>
To: alexander.h.duyck@linux.intel.com
Cc: zwisler@kernel.org, linux-nvdimm <linux-nvdimm@lists.01.org>
Subject: Re: [nvdimm PATCH 0/6] Label initialization time optimizations
Date: Wed, 10 Oct 2018 21:48:07 -0700	[thread overview]
Message-ID: <CAPcyv4iwQwEpNGqFS6KtQiW5F7Ab9N6K1XpYQh871CU=cX3ZUA@mail.gmail.com> (raw)
In-Reply-To: <20181010233428.12228.26106.stgit@localhost.localdomain>

On Wed, Oct 10, 2018 at 4:36 PM Alexander Duyck
<alexander.h.duyck@linux.intel.com> wrote:
>
> 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.

Thanks, this all looks good to me, the split looks good, and the
commentary in patch6 made it easy to review.

I quibble with "Remove empty if statement" because I find positive
logic easier to read than negative logic, but removing more lines than
it adds made me reserve that quibble for another time.
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm

  parent reply	other threads:[~2018-10-11  4:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-10 23:36 Alexander Duyck
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 ` Dan Williams [this message]
2018-10-12 15:36 ` [nvdimm PATCH 0/6] Label initialization time optimizations Kani, Toshi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAPcyv4iwQwEpNGqFS6KtQiW5F7Ab9N6K1XpYQh871CU=cX3ZUA@mail.gmail.com' \
    --to=dan.j.williams@intel.com \
    --cc=alexander.h.duyck@linux.intel.com \
    --cc=linux-nvdimm@lists.01.org \
    --cc=zwisler@kernel.org \
    --subject='Re: [nvdimm PATCH 0/6] Label initialization time optimizations' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).