From: Trond Myklebust <trondmy@primarydata.com>
To: "chuck.lever@oracle.com" <chuck.lever@oracle.com>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>
Subject: Re: i_lock contention during heavy I/O
Date: Mon, 17 Jul 2017 16:04:09 +0000 [thread overview]
Message-ID: <1500307447.4036.7.camel@primarydata.com> (raw)
In-Reply-To: <1500297979.4036.1.camel@primarydata.com>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 parent reply other threads:[~2017-07-17 16:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-17 9:22 i_lock contention during heavy I/O Chuck Lever
2017-07-17 13:26 ` Trond Myklebust
2017-07-17 16:04 ` Trond Myklebust [this message]
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=1500307447.4036.7.camel@primarydata.com \
--to=trondmy@primarydata.com \
--cc=chuck.lever@oracle.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.