Linux-NFS Archive on lore.kernel.org
 help / color / Atom feed
From: "J. Bruce Fields" <bfields@redhat.com>
To: linux-nfs@vger.kernel.org
Cc: "J. Bruce Fields" <bfields@redhat.com>
Subject: [PATCH 0/2] tweak knfsd session slot table sizing
Date: Mon, 25 Sep 2017 09:21:42 -0400
Message-ID: <1506345704-9486-1-git-send-email-bfields@redhat.com> (raw)

From: "J. Bruce Fields" <bfields@redhat.com>

Current client and server defaults can limit NFSv4.1+ mounts to as few
as 4 per gigabytes of server RAM, and people have been running into the
limit on upgrading the protocol version from 4.0 to 4.1.

Bump the limit.  Also return smaller ca_maxrequests as the limit
approaches instead of waiting till we have to fail CREATE_SESSION
completely.

A few years ago Trond also posted some patches to dynamically resize
existing sessions as limits approach--I'll revisit those at some point
too.

The numbers chosen here are honestly still a little arbitrary, and we
may tweak them again if we see more problems.

--b.

J. Bruce Fields (2):
  nfsd: increase DRC cache limit
  nfsd: give out fewer session slots as limit approaches

 fs/nfsd/nfs4state.c | 5 +++++
 fs/nfsd/nfssvc.c    | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

-- 
2.13.5


             reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-25 13:21 J. Bruce Fields [this message]
2017-09-25 13:21 ` [PATCH 1/2] nfsd: increase DRC cache limit J. Bruce Fields
2017-09-25 13:21 ` [PATCH 2/2] nfsd: give out fewer session slots as limit approaches J. Bruce Fields
2019-09-19  1:08   ` NeilBrown
2019-09-19 16:22     ` J. Bruce Fields
2019-09-19 17:17       ` J. Bruce Fields
2019-09-19 18:41         ` bfields
2019-09-20  6:15           ` [PATCH 1/2] nfsd: handle drc over-allocation gracefully NeilBrown
2019-09-20  6:33             ` [PATCH 1/2 - vers2] " NeilBrown
2019-09-20  6:36               ` [PATCH - 2/2] nfsd: degraded slot-count more gracefully as allocation nears exhaustion NeilBrown
2019-09-20 16:28               ` [PATCH 1/2 - vers2] nfsd: handle drc over-allocation gracefully J. Bruce Fields

Reply instructions:

You may reply publically 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=1506345704-9486-1-git-send-email-bfields@redhat.com \
    --to=bfields@redhat.com \
    --cc=linux-nfs@vger.kernel.org \
    /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

Linux-NFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-nfs/0 linux-nfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-nfs linux-nfs/ https://lore.kernel.org/linux-nfs \
		linux-nfs@vger.kernel.org
	public-inbox-index linux-nfs

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-nfs


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git