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 13:18:13 +0200 [thread overview]
Message-ID: <488864F5.4040606@redhat.com> (raw)
In-Reply-To: <20080724093302.GA4755@implementation.uk.xensource.com>
Samuel Thibault wrote:
> Jamie Lokier, le Thu 24 Jul 2008 10:24:03 +0100, a écrit :
>> Gerd Hoffmann wrote:
>>> (2) Run ptys in non-blocking mode. Drawback: we risk loosing data
>>> in case the pty reader is slow (also when nobody is connected of
>>> course, but that is intentional ...).
>> (4) Run ptys in non-blocking mode, but use a small output buffer in
>> QEMU so nothing is lost. It's not that hard.
>
> Err, there's _already_ a small buffer in the kernel pty layer :)
Yep, one page (aka 4k on x86) in size. Of course we can buffer in qemu
too. That doesn't solve the fundamental issue though (unless we don't
limit the buffer size, which would be insane IMHO).
cheers,
Gerd
--
http://kraxel.fedorapeople.org/xenner/
next prev parent reply other threads:[~2008-07-24 11:18 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 [this message]
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
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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