From: Christoph Hellwig <hch@infradead.org>
To: "Ted Ts'o" <tytso@mit.edu>, Dave Chinner <david@fromorbit.com>,
Andi Kleen <andi@firstfloor.org>,
Christoph Hellwig <hch@infradead.org>,
Daniel Ehrenberg <dehrenberg@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: Approaches to making io_submit not block
Date: Fri, 2 Sep 2011 09:10:57 -0400 [thread overview]
Message-ID: <20110902131057.GA7779@infradead.org> (raw)
In-Reply-To: <20110902130835.GB4110@thunk.org>
On Fri, Sep 02, 2011 at 09:08:35AM -0400, Ted Ts'o wrote:
> That may be true for hard drives, but PCIe attached flash can support
> millions of IOP's per second --- i.e., at least hundreds of IOP's in
> milliseconds. Yes, these devices are expensive, but so are the
> thousand-disk RAID arrays that some people attach via XFS. :-)
reading / writing to the devices is different from allocator calls.
You reall do not want to do an allocator call for each of these device.
next prev parent reply other threads:[~2011-09-02 13:11 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-29 17:33 Approaches to making io_submit not block Daniel Ehrenberg
2011-08-30 5:32 ` Christoph Hellwig
2011-08-30 21:51 ` Daniel Ehrenberg
2011-08-31 5:26 ` Christoph Hellwig
2011-08-31 17:08 ` Andi Kleen
2011-08-31 21:00 ` Daniel Ehrenberg
2011-08-31 21:15 ` Andi Kleen
2011-09-01 4:18 ` Dave Chinner
2011-09-01 4:39 ` Andi Kleen
2011-09-01 6:54 ` Dave Chinner
2011-09-02 13:08 ` Ted Ts'o
2011-09-02 13:10 ` Christoph Hellwig [this message]
2011-09-01 3:39 ` Dave Chinner
2011-09-01 4:20 ` Christoph Hellwig
2011-08-30 7:02 ` Andi Kleen
[not found] ` <CAAK6Zt0Sh1GdEOb-tNf2FGXJs=e1Jbcqew13R_GdTqrv6vW97w@mail.gmail.com>
[not found] ` <x49k49uk2ox.fsf@segfault.boston.devel.redhat.com>
[not found] ` <4E5D5817.6040704@kernel.dk>
2011-08-30 22:19 ` Daniel Ehrenberg
2011-08-30 22:32 ` Jens Axboe
2011-08-30 22:41 ` Andrew Morton
2011-08-30 22:45 ` Daniel Ehrenberg
2011-08-30 22:54 ` Andrew Morton
2011-08-30 23:03 ` Jeremy Allison
2011-08-30 23:11 ` Andrew Morton
2011-08-31 11:04 ` Ulrich Drepper
2011-08-31 16:59 ` Jeremy Allison
2011-09-01 11:14 ` Ulrich Drepper
2011-09-01 15:58 ` Jeremy Allison
2011-09-01 16:04 ` Christoph Hellwig
2011-09-01 16:15 ` Jeremy Allison
2011-09-01 16:23 ` Christoph Hellwig
2011-09-01 16:31 ` Jeremy Allison
2011-09-01 16:34 ` Christoph Hellwig
2011-09-01 16:34 ` Jeremy Allison
2011-09-01 16:45 ` Christoph Hellwig
2011-09-01 16:57 ` Jeremy Allison
2011-08-31 5:34 ` Christoph Hellwig
2011-08-31 6:04 ` guy keren
2011-08-31 23:16 ` Daniel Ehrenberg
2011-08-31 23:48 ` guy keren
2011-08-31 23:59 ` Daniel Ehrenberg
2011-08-31 15:45 ` Gleb Natapov
2011-08-31 16:02 ` Avi Kivity
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