From: Matthew Wilcox <willy@linux.intel.com>
To: Purush Gupta <purush.gupta@nutanix.com>
Cc: Chris Mason <clm@fb.com>, "Martin K. Petersen" <mkp@mkp.net>,
Theodore Ts'o <tytso@mit.edu>, Dave Chinner <david@fromorbit.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: Write atomicity guarantees
Date: Thu, 24 Apr 2014 14:25:13 -0400 [thread overview]
Message-ID: <20140424182513.GD5886@linux.intel.com> (raw)
In-Reply-To: <CAN7X1U=yjcxW16C8H9G5WWEOj1S5Wh0O26WpE5QrC38biRShtw@mail.gmail.com>
On Thu, Apr 24, 2014 at 11:10:09AM -0700, Purush Gupta wrote:
> That would require a new NVMe write command semantic with descriptors
> currently its not there.
Yes ... I don't want to start defining such a command on linux-fsdevel.
What I'm hearing is that there's no benefit to a device that can guarantee
to write multiple contiguous sectors in a non-torn manner over a device
that can write a single sector in a non-torn manner.
For any real benefit, filesystems need (and Linux needs to introduce
plumbing for) vectored atomic writes.
next prev parent reply other threads:[~2014-04-24 18:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-24 17:39 Write atomicity guarantees Matthew Wilcox
2014-04-24 18:03 ` Chris Mason
2014-04-24 18:23 ` Dan Williams
2014-04-24 18:50 ` Chris Mason
2014-04-24 19:27 ` Dave Chinner
[not found] ` <CAN7X1U=yjcxW16C8H9G5WWEOj1S5Wh0O26WpE5QrC38biRShtw@mail.gmail.com>
2014-04-24 18:25 ` Matthew Wilcox [this message]
2014-04-24 18:44 ` Chris Mason
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