From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 2/3] Always use nonblocking mode for qemu_chr_open_fd.
Date: Thu, 24 Jul 2008 16:53:25 +0200 [thread overview]
Message-ID: <48889765.9080709@redhat.com> (raw)
In-Reply-To: <20080724150718.GA17248@shareable.org>
Jamie Lokier wrote:
> I'm surprised it works. You shouldn't be able to get any more
> information out of epoll() than poll() - they're supposed to be
> exactly equivalent informationally, except for details and performance.
I was thinking just the same ...
poll/epoll says the file handle is readable. It does that in two cases:
(1) there is data to read
(2) pty is unconnected and read() wants to give you an -EIO.
And I think you can't keep those two cases apart using only the
information given by poll/epoll ...
cheers,
Gerd
--
http://kraxel.fedorapeople.org/xenner/
next prev parent reply other threads:[~2008-07-24 14:53 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-18 13:24 [Qemu-devel] [PATCH 2/3] Always use nonblocking mode for qemu_chr_open_fd Ian Jackson
2008-07-23 1:26 ` Anthony Liguori
2008-07-23 8:24 ` Daniel P. Berrange
2008-07-23 11:48 ` Gerd Hoffmann
2008-07-23 12:15 ` Daniel P. Berrange
2008-07-23 12:52 ` Gerd Hoffmann
2008-07-23 12:59 ` Daniel P. Berrange
2008-07-23 14:24 ` Gerd Hoffmann
2008-07-23 15:24 ` Anthony Liguori
2008-07-23 15:31 ` Daniel P. Berrange
2008-07-23 15:32 ` Anthony Liguori
2008-07-23 16:17 ` Gerd Hoffmann
2008-07-23 16:33 ` Anthony Liguori
2008-07-23 19:08 ` Jamie Lokier
2008-07-24 7:24 ` Gerd Hoffmann
2008-07-24 7:54 ` Gerd Hoffmann
2008-07-24 8:31 ` Daniel P. Berrange
2008-07-24 9:24 ` Jamie Lokier
2008-07-24 9:33 ` Samuel Thibault
2008-07-24 11:18 ` Gerd Hoffmann
2008-07-23 16:11 ` Gerd Hoffmann
2008-07-23 16:31 ` Anthony Liguori
2008-07-24 8:35 ` Daniel P. Berrange
2008-07-24 14:23 ` Anthony Liguori
2008-07-24 15:07 ` Jamie Lokier
2008-07-24 14:53 ` Gerd Hoffmann [this message]
2008-07-23 16:44 ` Paul Brook
2008-07-24 17:37 ` Anthony Liguori
2008-07-25 7:15 ` Gerd Hoffmann
2008-07-25 16:17 ` Jamie Lokier
2008-07-28 8:49 ` Gerd Hoffmann
2008-07-28 11:59 ` Jamie Lokier
2008-07-28 12:20 ` Gerd Hoffmann
2017-02-01 12:33 ` David Woodhouse
2008-07-24 15:37 ` [Qemu-devel] " Anthony Liguori
2008-07-25 11:42 ` Gerd Hoffmann
2008-07-25 15:04 ` Anthony Liguori
2008-07-28 9:59 ` Gerd Hoffmann
2008-07-28 18:55 ` Anthony Liguori
2008-07-23 9:34 ` [Qemu-devel] " Kevin Wolf
2008-07-23 10:17 ` Ian Jackson
2008-07-23 11:43 ` Kevin Wolf
2008-07-23 12:04 ` Gerd Hoffmann
2008-07-23 12:18 ` Paul Brook
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